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Hasegawa H, Kiyofuji S, Umekawa M, Shinya Y, Okamoto K, Shono N, Kondo K, Shin M, Saito N. Profiles of central nervous system surgical site infections in endoscopic transnasal surgery exposing the intradural space. J Hosp Infect 2024; 146:166-173. [PMID: 37516279 DOI: 10.1016/j.jhin.2023.06.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/26/2023] [Accepted: 06/28/2023] [Indexed: 07/31/2023]
Abstract
OBJECTIVE Despite its efficacy and minimal invasiveness, the clean-contaminated nature of endoscopic transnasal surgery (ETS) may be susceptible to central nervous system surgical site infections (CNS-SSIs), especially when involving intradural exposure. However, the profiles of ETS-associated CNS-SSIs are not fully elucidated. METHODS The institutional ETS cases performed between May 2017 and March 2023 were retrospectively analysed. The incidences of CNS-SSIs were calculated, and their risk factors examined. RESULTS The incidence of CNS-SSIs was 2.3% (7/305) in the entire cohort and 5.0% (7/140) in ETSs with intradural exposure. All the CNS-SSIs were meningitis and developed following ETS with intradural exposure. The incidences were 0%, 5.6% and 5.8% in ETSs with Esposito grade 1, 2 and 3 intraoperative cerebrospinal fluid leakage, respectively. Among the pre- and intra-operative factors, body mass index (unit odds ratio (OR), 0.62; 95% confidence interval (CI), 0.44-0.89; P<0.01), serum albumin (unit OR, 0.03; 95% CI, 0.0007-0.92; P=0.02), and American Society of Anesthesiologists physical status score (unit OR, 20.7; 95% CI, 1.65-259; P<0.01) were significantly associated with CNS-SSIs. Moreover, postoperative cerebrospinal fluid leakage was also significantly associated with CNS-SSIs (OR, 18.4; 95% CI, 3.55-95.0; P<0.01). CONCLUSIONS The incidence of ETS-associated CNS-SSIs is acceptably low. Intradural exposure was a prerequisite for CNS-SSIs. Malnutrition and poor comorbidity status should be recognized as important risks for CNS-SSIs in ETS.
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Affiliation(s)
- H Hasegawa
- Department of Neurosurgery, University of Tokyo, Tokyo, Japan.
| | - S Kiyofuji
- Department of Neurosurgery, University of Tokyo, Tokyo, Japan
| | - M Umekawa
- Department of Neurosurgery, University of Tokyo, Tokyo, Japan
| | - Y Shinya
- Department of Neurosurgery, University of Tokyo, Tokyo, Japan
| | - K Okamoto
- Department of Infectious Diseases, University of Tokyo, Tokyo, Japan
| | - N Shono
- Department of Neurosurgery, University of Tokyo, Tokyo, Japan
| | - K Kondo
- Department of Otorhinolaryngology, University of Tokyo, Tokyo, Japan
| | - M Shin
- Department of Neurosurgery, Teikyo University, Tokyo, Japan
| | - N Saito
- Department of Neurosurgery, University of Tokyo, Tokyo, Japan
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Mizogami M, Hasegawa H, Yamada Y, Wasa M, Ikeda K. Examination of changes in the breathing intolerance index to determine the respiratory support needs of very low birth weight infants. Pediatr Pulmonol 2024. [PMID: 38501335 DOI: 10.1002/ppul.26969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/06/2024] [Accepted: 03/07/2024] [Indexed: 03/20/2024]
Abstract
BACKGROUND The breathing intolerance index (BITI) is used to evaluate respiratory muscle tolerance. The higher the ratio of the inspiratory time to the total breathing time and the ratio of the tidal volume to the vital capacity, the more easily the respiratory muscles become fatigued. The BITI is high with chronic respiratory failure, and values of 0.15 or more indicate the need for assisted ventilation. OBJECTIVE This study aimed to examine the changes in the BITI of very low birth weight infants (VLBWIs) and determine whether it is possible to use the BITI as an objective indicator of the timing of noninvasive respiratory support (NRS) withdrawal. METHODS VLBWIs admitted to our neonatal intensive care unit between July 2020 and July 2022 under NRS at 36 weeks' postmenstrual age (PMA). If the BITI was less than 0.15, then we attempted to determine whether NRS could be withdrawn. RESULTS Sixteen infants with a median gestational age and birth weight of 30.9 weeks and 1249 g, respectively, were eligible. The median PMA at the time of the first examination was 36.6 weeks. The BITI of two VLBWIs was less than 0.15. For 11 of the other VLBWIs, the BITI decreased over time to less than 0.15 at 39 weeks' PMA. After confirming that the BITI was less than 0.15, weaning from NRS was attempted. Weaning from NRS was possible except one VLBWI. CONCLUSION The BITI can help evaluate respiratory tolerance and could be an objective indicator of the timing of NRS withdrawal.
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Affiliation(s)
- Masae Mizogami
- Department of Neonatology, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
| | - Hisaya Hasegawa
- Department of Neonatology, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
| | - Yosuke Yamada
- Department of Neonatology, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
| | - Masanori Wasa
- Department of Neonatology, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
| | - Kenta Ikeda
- Department of Neonatology, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
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Mori M, Yoshizaki K, Watabe S, Ishige M, Hinoki A, Kondo T, Taguchi T, Hasegawa H, Hatata T, Tanuma N, Kirino K, Hirakawa A, Naruto T, Imai M, Koike R, Hosoi K, Kusuda S. Safety, efficacy and pharmacokinetics of palivizumab in off-label neonates, infants, and young children at risk for serious respiratory syncytial virus infection: a multicenter phase II clinical trial. Lancet Reg Health West Pac 2023; 39:100847. [PMID: 37554997 PMCID: PMC10405310 DOI: 10.1016/j.lanwpc.2023.100847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/02/2023] [Accepted: 06/28/2023] [Indexed: 08/10/2023]
Abstract
BACKGROUND Pediatric patients with certain rare diseases are at increased risk of severe respiratory syncytial virus (RSV) infection. However, the prophylactic use of anti-RSV antibody (palivizumab) in these patients is not indicated at present in Japan. METHODS This first-in-the-world multicenter, uncontrolled, open-label, phase II clinical trial was carried out between 28 July 2019 and 24 September 2021 at seven medical institutions in Japan to investigate the efficacy, safety, and pharmacokinetics of palivizumab in 23 subjects recruited from among neonates, infants, or children aged 24 months or younger who had any of the following conditions: pulmonary hypoplasia, airway stenosis, congenital esophageal atresia, inherited metabolic disease, or neuromuscular disease. At least four continuous doses of palivizumab were administered intramuscularly at 15 mg/kg at intervals of 30 days. FINDINGS Twenty-three enrolled subjects completed the study. No subject required hospitalization for RSV. Adverse events (AE) did not notably differ from the event terms described in the latest interview form. Five severe AEs required unplanned hospitalization, but resolved without RSV infection. Therapeutically effective concentrations of palivizumab were maintained throughout the study period. INTERPRETATION Palivizumab might be well tolerated and effective in preventing serious respiratory symptoms and hospitalization due to severe RSV infection, indicating the prophylactic use in the pediatric patients included in this study. FUNDING Japan Agency for Medical Research and Development (AMED), grant numbers 19lk0201097h0001 (to MM), 20lk0201097h0002 (to MM), 21lk0201097h0003 (to MM), and 22lk0201097h0004 (to MM). AMED did not have any role in the execution of this study, analysis and interpretation of the data, or the decision to submit the results.
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Affiliation(s)
- Masaaki Mori
- Department of Pediatrics, Tokyo Medical and Dental University Medical Hospital, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
- Division of Rheumatology and Allergology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Kanako Yoshizaki
- Department of Pediatrics, Kurashiki Central Hospital, 1-1-1 Miwa, Kurashiki, Okayama 710-8602, Japan
| | - Shinichi Watabe
- Department of Pediatrics, Kurashiki Central Hospital, 1-1-1 Miwa, Kurashiki, Okayama 710-8602, Japan
| | - Mika Ishige
- Department of Pediatrics and Child Health, Nihon University School of Medicine, 1-6 Kanda Surugadai, Chiyoda-ku, Tokyo 101-8309, Japan
| | - Akinari Hinoki
- Department of Rare/Intractable Cancer Analysis Research, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Takuya Kondo
- Department of Pediatric Surgery, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Tomoaki Taguchi
- Department of Pediatric Surgery, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Hisaya Hasegawa
- Division of Neonatal Intensive Care, Tokyo Women’s Medical University, Adachi Medical Center, 4-33-1 Kohoku, Adachi-ku, Tokyo 123-8558, Japan
| | - Tomoko Hatata
- Department of Pediatric Surgery, Nagano Children’s Hospital, 3100 Toyoshina, Azumino, Nagano 399-8288, Japan
| | - Naoyuki Tanuma
- Department of Pediatrics, Tokyo Metropolitan Fuchu Medical Center for the Disabled, 2-9-2 Musashidai, Fuchu, Tokyo 183-8553, Japan
| | - Kosuke Kirino
- Department of Data Science, Clinical Research Center, National Center for Child Health and Development, 2-10-1 Ohkura, Setagaya-ku, Tokyo 157-0074, Japan
| | - Akihiro Hirakawa
- Department of Clinical Biostatistics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Takuya Naruto
- Clinical Research Institute, Kanagawa Children’s Medical Center, 2-138-4 Mutsukawa, Minami-ku, Yokohama 232-8555, Japan
| | - Minoru Imai
- Medical Innovation Promotion Center, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Ryuji Koike
- Medical Innovation Promotion Center, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan
- Clinical Research Center, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Kenichiro Hosoi
- Department of Pediatrics, Faculty of Medicine, Kyorin University, 6-20-2 Shinkawa, Mitaka, Tokyo 181-8611, Japan
| | - Satoshi Kusuda
- Department of Pediatrics, Faculty of Medicine, Kyorin University, 6-20-2 Shinkawa, Mitaka, Tokyo 181-8611, Japan
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Hasegawa H, Matsuda A, Morishita T, Madsen LB, Jensen F, Tolstikhin OI, Hishikawa A. Dissociative ionization and Coulomb explosion of CH 4 in two-color asymmetric intense laser fields. Phys Chem Chem Phys 2023; 25:25408-25419. [PMID: 37706318 DOI: 10.1039/d3cp02337k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
Directional fragment ejection from a tetrahedral molecule CH4 in linearly polarized two-color (ω and 2ω) asymmetric intense laser fields (50 fs, 1.4 × 1014 W cm-2, 800 nm and 400 nm) has been studied by three-dimensional ion coincidence momentum imaging. The H+ fragment produced from dissociative ionization, CH4 → H+ + CH3 + e-, is preferentially ejected on the larger amplitude side of the laser electric fields. Comparison with theoretical predictions by weak-field asymptotic theory shows that the observed asymmetry can be understood by the orientation selective tunneling ionization from the triply degenerated highest occupied molecular orbital (1t2) of CH4. A similar directional ejection of H+ was also observed for the low kinetic energy components of the two-body Coulomb explosion, CH4 → H+ + CH3+ + 2e-. On the other hand, the fragment ejection in the opposite direction were observed for the high energy component, as well as H2+ produced from the Coulomb explosion CH4 → H2+ + CH2+ + 2e-. Possible origins of the characteristic fragmentation are discussed.
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Affiliation(s)
- H Hasegawa
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi, 464-8602, Japan.
| | - A Matsuda
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi, 464-8602, Japan.
| | - T Morishita
- Institute for Advanced Science, The University of Electro-Communications, 1-5-1 Chofu-ga-oka, Chofu-shi, Tokyo 182-8585, Japan
| | - L B Madsen
- Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark
| | - F Jensen
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
| | - O I Tolstikhin
- Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia
| | - A Hishikawa
- Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi, 464-8602, Japan.
- Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi, 464-8602, Japan
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Hasegawa H, Denton RE, Dokgo K, Hwang K, Nakamura TKM, Burch JL. Ion-Scale Magnetic Flux Rope Generated From Electron-Scale Magnetopause Current Sheet: Magnetospheric Multiscale Observations. J Geophys Res Space Phys 2023; 128:e2022JA031092. [PMID: 38440152 PMCID: PMC10909477 DOI: 10.1029/2022ja031092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 03/05/2023] [Accepted: 03/08/2023] [Indexed: 03/06/2024]
Abstract
We present in-depth analysis of three southward-moving meso-scale (ion-to magnetohydrodynamic-scale) flux transfer events (FTEs) and subsequent crossing of a reconnecting magnetopause current sheet (MPCS), which were observed on 8 December 2015 by the Magnetospheric Multiscale spacecraft in the subsolar region under southward and duskward magnetosheath magnetic field conditions. We aim to understand the generation mechanism of ion-scale magnetic flux ropes (ISFRs) and to reveal causal relationship among magnetic field structures, electromagnetic energy conversion, and kinetic processes in magnetic reconnection layers. Results from magnetic field reconstruction methods are consistent with a flux rope with a length of about one ion inertial length growing from an electron-scale current sheet (ECS) in the MPCS, supporting the idea that ISFRs can be generated through secondary reconnection in an ECS. Grad-Shafranov reconstruction applied to the three FTEs shows that the FTEs had axial orientations similar to that of the ISFR. This suggests that these FTEs also formed through the same secondary reconnection process, rather than multiple X-line reconnection at spatially separated locations. Four-spacecraft observations of electron pitch-angle distributions and energy conversion rate j · E ' = j · E + v e × B suggest that the ISFR had three-dimensional magnetic topology and secondary reconnection was patchy or bursty. Previously reported positive and negative values of j · E ' , with magnitudes much larger than expected for typical MP reconnection, were seen in both magnetosheath and magnetospheric separatrix regions of the ISFR. Many of them coexisted with bi-directional electron beams and intense electric field fluctuations around the electron gyrofrequency, consistent with their origin in separatrix activities.
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Affiliation(s)
- H. Hasegawa
- Institute of Space and Astronautical ScienceJapan Aerospace Exploration AgencySagamiharaJapan
- Southwest Research InstituteSan AntonioTXUSA
| | - R. E. Denton
- Department of Physics and AstronomyDartmouth CollegeHanoverNHUSA
| | - K. Dokgo
- Southwest Research InstituteSan AntonioTXUSA
| | - K.‐J. Hwang
- Southwest Research InstituteSan AntonioTXUSA
| | | | - J. L. Burch
- Southwest Research InstituteSan AntonioTXUSA
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Okano DR, Hasegawa H, Okada H, Kawamoto E, Kurokawa S, Kakogawa J, Suzuki Y, Camann W, Nagasaka Y. Valley position for a primary ciliary dyskinesia (Kartagener's syndrome) parturient to optimize respiratory function during cesarean delivery. Int J Obstet Anesth 2023; 53:103619. [PMID: 36604283 DOI: 10.1016/j.ijoa.2022.103619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/01/2022] [Accepted: 12/08/2022] [Indexed: 12/23/2022]
Affiliation(s)
- D R Okano
- Department of Anesthesia, Indiana University School of Medicine, Indianapolis, IN, USA
| | - H Hasegawa
- Department of Anesthesiology, Tokyo Women's Medical University, Tokyo, Japan
| | - H Okada
- Department of Anesthesiology, Tokyo Women's Medical University, Tokyo, Japan; Department of Anesthesiology and Pain Medicine, Juntendo University Urayasu Hospital, Chiba, Japan
| | - E Kawamoto
- Department of Anesthesiology, Tokyo Women's Medical University, Tokyo, Japan
| | - S Kurokawa
- Department of Anesthesiology, Tokyo Women's Medical University, Tokyo, Japan
| | - J Kakogawa
- Department of Obstetrics, Tokyo Women's Medical University, Tokyo, Japan
| | - Y Suzuki
- Department of Anesthesia, National Center for Child Health and Development, Tokyo, Japan
| | - W Camann
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Y Nagasaka
- Department of Anesthesiology, Tokyo Women's Medical University, Tokyo, Japan.
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Wasa M, Hasegawa H, Kihara H, Yamada Y, Mizogami M, Kitamura R, Ikeda K. Surfactant therapy using a bronchofiberscope in respiratory distress syndrome. Pediatr Int 2023; 65:e15478. [PMID: 36656737 DOI: 10.1111/ped.15478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 12/30/2022] [Accepted: 01/12/2023] [Indexed: 01/20/2023]
Abstract
BACKGROUND Avoiding endotracheal intubation and using nasal continuous positive airway pressure as the initial treatment is recommended in infants with respiratory distress syndrome (RDS), and modes of lesser invasive surfactant administration have recently been reported. We report a pilot study assessing the feasibility of surfactant therapy using a bronchofiberscope (STUB) in RDS. METHODS Surfactant was administered to 31 preterm infants (gestational age range of 28 weeks 0 days to 36 weeks 6 days) diagnosed with RDS, through the working channel of the bronchofiberscope or endotracheal tubes. Patient characteristics, outcomes, adverse events, and comorbidities were assessed in the two groups. RESULTS Twelve infants received STUB. Two of the 12 infants (17%) needed subsequent intubation and additional surfactant administration. Nineteen infants received surfactant through endotracheal tubes. Four of the 19 infants (21%) required additional surfactants. There was no significant difference in the number of infants that needed additional surfactant (p = 1.00). Gestational age, birthweight, length of hospitalization, adverse events, such as desaturations and bradycardias, and comorbidities were similar between the two groups. Days of invasive ventilation were significantly shorter in the STUB group (p = 0.0002). CONCLUSION STUB was feasible in this small cohort and reduced the need for intubation to 17%, leading to fewer days of invasive ventilation, without increasing comorbidities and adverse events. To the best of our knowledge, this is the first study to administer surfactants using bronchofiberscopes.
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Affiliation(s)
- Masanori Wasa
- Department of Neonatology, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
| | - Hisaya Hasegawa
- Department of Neonatology, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
| | - Hirotaka Kihara
- Department of Pediatrics, Hiroshima City Hiroshima Citizens Hospital, Hiroshima, Japan
| | - Yosuke Yamada
- Department of Neonatology, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
| | - Masae Mizogami
- Department of Neonatology, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
| | - Rei Kitamura
- Department of Neonatology, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
| | - Kenta Ikeda
- Department of Neonatology, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
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8
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Maeda T, Suzuki T, Mizutani K, Hasegawa H, Sato Y. Refractory pneumothorax due to tracheal laceration in extremely preterm infant. Pediatr Int 2023; 65:e15698. [PMID: 38108197 DOI: 10.1111/ped.15698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/21/2023] [Accepted: 10/05/2023] [Indexed: 12/19/2023]
Affiliation(s)
- Takashi Maeda
- Division of Neonatology, Center for Maternal Neonatal Care, Nagoya University Hospital, Nagoya, Aichi, Japan
| | - Toshihiko Suzuki
- Division of Neonatology, Center for Maternal Neonatal Care, Nagoya University Hospital, Nagoya, Aichi, Japan
| | - Kensuke Mizutani
- Division of Neonatology, Center for Maternal Neonatal Care, Nagoya University Hospital, Nagoya, Aichi, Japan
| | - Hisaya Hasegawa
- Division of Neonatal Intensive Care, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Yoshiaki Sato
- Division of Neonatology, Center for Maternal Neonatal Care, Nagoya University Hospital, Nagoya, Aichi, Japan
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9
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Miyazawa T, Arahori H, Ohnishi S, Shoji H, Matsumoto A, Wada YS, Takahashi N, Takayanagi T, Toishi S, Nagaya K, Hasegawa H, Hayakawa M, Hida M, Fukuhara R, Yamada Y, Kawai M, Takashi K, Wada K, Morioka I, Mizuno K. Mortality and morbidity of extremely low birth weight infants in Japan, 2015. Pediatr Int 2023; 65:e15493. [PMID: 36740921 DOI: 10.1111/ped.15493] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/10/2023] [Accepted: 02/02/2023] [Indexed: 02/07/2023]
Abstract
BACKGROUND In Japan, the mortality rate of extremely low birth weight (ELBW) infants is notably low in comparison with other developed countries, but the prevalence of chronic lung disease (CLD) and retinopathy of prematurity (ROP) is relatively high. This study aimed to estimate the mortality and morbidity of ELBW infants born in 2015 who were admitted to neonatal intensive care units (NICUs) in Japan and to examine the factors that affected the short-term outcomes of these infants. We also compared the mortality of ELBW infants born in 2005, 2010, and 2015. METHODS We analyzed the mortality, morbidity, and factors related to short-term outcomes of ELBW infants, using data from 2782 infants born in 2015 and registered at NICUs in Japan. RESULTS The mortality rates during NICU stays were 17.0%, 12.0%, and 9.8% for ELBW infants born in 2005, 2010, and 2015, respectively. Among ELBW infants born in 2015, multiple logistic regression analysis showed that short gestational age and low birthweight Z-score contributed to the increased risk of death. Births by cesarean section and antenatal corticosteroid administration were significantly associated with a reduced risk of death. Among infants who survived, CLD was observed in 53.1% and ROP requiring treatment was observed in 30.4%. CONCLUSIONS Mortality in ELBW infants decreased significantly from 2005 to 2015. As CLD and ROP may affect quality of life and long-term outcomes of infants who survived, prevention strategies and management for these complications are critical issues in neonatal care in Japan.
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Affiliation(s)
- Tokuo Miyazawa
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics, Showa University School of Medicine, Tokyo, Japan
| | - Hitomi Arahori
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Satoshi Ohnishi
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Hromichi Shoji
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Atsushi Matsumoto
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics, Iwate Medical University School of Medicine, Iwate, Japan
| | - Yuka Sano Wada
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Neonatology, National Center for Child Health and Development, Tokyo, Japan
| | - Naoto Takahashi
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics, The University of Tokyo Hospital, Tokyo, Japan
| | - Toshimitsu Takayanagi
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics, National Hospital Organization, Saga National Hospital, Saga, Japan
| | - Satoshi Toishi
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Neonatology, Japanese Red Cross Narita Hospital, Chiba, Japan
| | - Ken Nagaya
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Division of Neonatology, Center for Maternity and Infant Care, Asahikawa Medical University Hospital, Hokkaido, Japan
| | - Hisaya Hasegawa
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Division of Neonatal Intensive Care, Tokyo Women's Medical University Adachi Medical Center, Tokyo, Japan
| | - Masahiro Hayakawa
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Division of Neonatology, Center for Maternal-Neonatal Care, Nagoya University Hospital, Nagoya, Japan
| | - Mariko Hida
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Rie Fukuhara
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Neonatology, Hiroshima Prefectural Hospital, Hiroshima, Japan
| | - Yasumasa Yamada
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Perinatal and Neonatal Medicine, Aichi Medical University Hospital, Aichi, Japan
| | - Masahiko Kawai
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kusaka Takashi
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Kazuko Wada
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Neonatology, Osaka Women's and Children's Hospital, Osaka, Japan
| | - Ichiro Morioka
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
| | - Katsumi Mizuno
- The Committee on Neonatal Medicine, Japan Pediatric Society, Tokyo, Japan
- Department of Pediatrics, Showa University School of Medicine, Tokyo, Japan
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Mikami H, Kimura G, Taniuchi M, Katsu A, Hasegawa H, Yanagi M, Endo Y, Takeda H, Akatsuka J, Toyama Y, Kondo Y. 154P Can urine cytology predict variants of bladder cancer? Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
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11
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Kaneko Y, Fukuda K, Irie T, Shimizu H, Tamura S, Kobari T, Hasegawa H, Nakajima T, Ishii H. Electrophysiological characteristics and catheter ablation of atypical fast-slow atrioventricular nodal reentrant tachycardia using an inferolateral left atrial slow pathway. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Understandings of subtypes of atypical atrioventricular nodal reentrant tachycardia (AVNRT) using variants of slow pathway (SP) are still growing. Inferolateral (inf-lat-) left atrial (LA) SP is a rare variant extending into an inf-lat-LA along the mitral annulus (MA).
Purpose
To characterize an unknown subtype of atypical fast-slow (F/S-) AVNRT using an inf-lat-LA-SP as a retrograde limb (inf-lat-LA-F/S-AVNRT).
Methods
This Japanese multicenter retrospective study enrolled 4 patients of inf-lat-LA-F/S-AVNRT that was characterized by the earliest site of atrial activation during tachycardia (EAA) between 3 and 6 o'clock along the MA. The diagnosis was made by an exclusion of AV reentrant tachycardia (AVRT) and atrial tachycardia (AT) according to the standard criteria and was confirmed by successful elimination of tachycardia and the inf-lat-LA-SP.
Results
Surface ECG during tachycardia revealed long RP appearance except one who had short RP due to a short conduction time across the inf-lat-LA-SP. During tachycardia, far-field LA activation preceding near-field activation of coronary sinus (CS) musculature was visible in the CS recording in 2. Retrograde conduction via the inf-lat-LA-SP with a decremental delay was consistently reproducible with ventricular stimulation in 2, 1 of whom had double atrial response, while it was always masked by the presence of a retrograde conduction via the fast pathway in 1 and a retrograde block at the lower common pathway in 1. An injection of a small dose of ATP transiently interrupted a retrograde conduction over the inf-lat-LA-SP, suggesting its ATP-sensitivity. Exclusion of AVRT was made by no resetting of tachycardia with left ventricular extrastimulus in 2 and VA dissociation during overdrive pacing of tachycardia in remaining 2. Exclusion of AT was made by V-A-V response after ventricular entrainment in 1 and termination without atrial capture by ventricular pacing in 2. Ablation of the right-sided SP was unsuccessful to eliminate the tachycardia, but ablation at or near the EAA by transseptal approach was successful to cure the tachycardia, associated with an elimination of a retrograde conduction over the inf-lat-LA-SP following a development of an accelerated junction rhythm in all. Low-frequency potentials preceding local atrial activation, consistent with a retrograde activation via the inf-lat-LA-SP were detected along the MA medial to the EAA in 1.
Conclusions
Differential diagnosis of tachycardia with the EAA in the inf-lat-LA and especially long RP appearance should include inf-lat-LA-F/S-AVNRT. Presumed arrhythmogenic substrate of the inf-lat-LA-SP seemed to be consistent with the remnant of embryogenic AV ring tissue in the electropharmacological and locational characteristics. Successful elimination of this AVNRT can be obtained by ablation of the inf-lat-LA-SP, but not of the right-sided SP.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- Y Kaneko
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
| | - K Fukuda
- International University of Health and Welfare Hospital, Department of Cardiology , Nasushiobara , Japan
| | - T Irie
- Saitama Sekishinkai Hospita, Department of Cardiology , Sayama , Japan
| | - H Shimizu
- Saiseikai Niigata Hospital, Department of Cardiology , Niigata , Japan
| | - S Tamura
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
| | - T Kobari
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
| | - H Hasegawa
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
| | - T Nakajima
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
| | - H Ishii
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
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12
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Boku S, Satake H, Ohta T, Mitani S, Kawakami K, Matsumoto T, Yamazaki E, Hasegawa H, Ikoma T, Uemura M, Yamaguchi T, Ishizuka Y, Kurokawa Y, Sakai D, Kawakami H, Shimokawa T, Tsujinaka T, Kato T, Satoh T, Kagawa Y. 440TiP TRESBIEN (OGSG 2101): Encorafenib, binimetinib and cetuximab for early relapse stage II/III BRAF V600E-mutated CRC. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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13
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Hasegawa H, Denton RE, Nakamura TKM, Genestreti KJ, Phan TD, Nakamura R, Hwang K, Ahmadi N, Shi QQ, Hesse M, Burch JL, Webster JM, Torbert RB, Giles BL, Gershman DJ, Russell CT, Strangeway RJ, Wei HY, Lindqvist P, Khotyaintsev YV, Ergun RE, Saito Y. Magnetic Field Annihilation in a Magnetotail Electron Diffusion Region With Electron-Scale Magnetic Island. J Geophys Res Space Phys 2022; 127:e2022JA030408. [PMID: 36248013 PMCID: PMC9541864 DOI: 10.1029/2022ja030408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 05/27/2022] [Accepted: 06/20/2022] [Indexed: 06/16/2023]
Abstract
We present observations in Earth's magnetotail by the Magnetospheric Multiscale spacecraft that are consistent with magnetic field annihilation, rather than magnetic topology change, causing fast magnetic-to-electron energy conversion in an electron-scale current sheet. Multi-spacecraft analysis for the magnetic field reconstruction shows that an electron-scale magnetic island was embedded in the observed electron diffusion region (EDR), suggesting an elongated shape of the EDR. Evidence for the annihilation was revealed in the form of the island growing at a rate much lower than expected for the standard X-type geometry of the EDR, which indicates that magnetic flux injected into the EDR was not ejected from the X-point or accumulated in the island, but was dissipated in the EDR. This energy conversion process is in contrast to that in the standard EDR of a reconnecting current sheet where the energy of antiparallel magnetic fields is mostly converted to electron bulk-flow energy. Fully kinetic simulation also demonstrates that an elongated EDR is subject to the formation of electron-scale magnetic islands in which fast but transient annihilation can occur. Consistent with the observations and simulation, theoretical analysis shows that fast magnetic diffusion can occur in an elongated EDR in the presence of nongyrotropic electron effects. We suggest that the annihilation in elongated EDRs may contribute to the dissipation of magnetic energy in a turbulent collisionless plasma.
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Affiliation(s)
- H. Hasegawa
- Institute of Space and Astronautical ScienceJapan Aerospace Exploration AgencySagamiharaJapan
| | - R. E. Denton
- Department of Physics and AstronomyDartmouth CollegeHanoverNHUSA
| | - T. K. M. Nakamura
- Space Research InstituteAustrian Academy of SciencesGrazAustria
- Institute of PhysicsUniversity of GrazGrazAustria
| | | | - T. D. Phan
- Space Sciences LaboratoryUniversity of CaliforniaBerkeleyCAUSA
| | - R. Nakamura
- Space Research InstituteAustrian Academy of SciencesGrazAustria
| | - K.‐J. Hwang
- Southwest Research InstituteSan AntonioTXUSA
| | - N. Ahmadi
- Laboratory for Atmospheric and Space PhysicsUniversity of ColoradoBoulderCOUSA
| | - Q. Q. Shi
- Shandong Provincial Key Laboratory of Optical Astronomy and Solar‐Terrestrial EnvironmentInstitute of Space SciencesShandong UniversityWeihaiChina
| | - M. Hesse
- NASA Ames Research CenterMoffett FieldCAUSA
| | - J. L. Burch
- Southwest Research InstituteSan AntonioTXUSA
| | | | - R. B. Torbert
- Institute of PhysicsUniversity of GrazGrazAustria
- Physics DepartmentUniversity of New HampshireDurhamNHUSA
| | - B. L. Giles
- NASA Goddard Space Flight CenterGreenbeltMDUSA
| | | | - C. T. Russell
- Department of Earth, Planetary, and Space SciencesUniversity of CaliforniaLos AngelesCAUSA
| | - R. J. Strangeway
- Department of Earth, Planetary, and Space SciencesUniversity of CaliforniaLos AngelesCAUSA
| | - H. Y. Wei
- Department of Earth, Planetary, and Space SciencesUniversity of CaliforniaLos AngelesCAUSA
| | | | | | - R. E. Ergun
- Department of Astrophysical and Planetary SciencesUniversity of ColoradoBoulderCOUSA
| | - Y. Saito
- Institute of Space and Astronautical ScienceJapan Aerospace Exploration AgencySagamiharaJapan
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14
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Hasegawa H, Tsukada Y, Wakabayashi M, Nomura S, Sasaki T, Nishizawa Y, Ikeda K, Takeshita N, Teramura K, Ito M. Impact of near-infrared fluorescence imaging with indocyanine green on structural sequelae of anastomotic leakage after laparoscopic intersphincteric resection of malignant rectal tumors. Tech Coloproctol 2022; 26:561-570. [DOI: 10.1007/s10151-022-02631-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 05/02/2022] [Indexed: 12/16/2022]
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15
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Fujise H, Uemura M, Hasegawa H, Ikeya D, Matsuda A, Morishita T, Madsen LB, Jensen F, Tolstikhin OI, Hishikawa A. Helicity-dependent dissociative tunneling ionization of CF 4 in multicycle circularly polarized intense laser fields. Phys Chem Chem Phys 2022; 24:8962-8969. [PMID: 35380001 DOI: 10.1039/d1cp05858d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dissociative tunneling ionization of tetrafluoromethane (CF4) in circularly polarized ultrashort intense laser fields (35 fs, 0.8 × 1014 W cm-2, 1035 nm), CF4 → CF4+ + e- → CF3+ + F + e-, has been studied by three-dimensional electron-ion coincidence momentum imaging. The photoelectron angular distribution in the recoil frame revealed that the dissociative tunneling ionization occurs efficiently when the laser electric field points from F to C. The obtained results are qualitatively consistent with the theoretical predictions by the weak-field asymptotic theory (WFAT) for tunneling ionization from the highest and next-highest occupied molecular orbitals, HOMO (1t1), and HOMO-1 (4t2), respectively. On the other hand, the angular distribution shows clear dependences on the polarization helicity, indicating that the breaking of the C-F bonds is sensitive to the helicity of the multicycle circularly polarized laser fields.
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Affiliation(s)
- H Fujise
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan.
| | - M Uemura
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan.
| | - H Hasegawa
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan.
| | - D Ikeya
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan.
| | - A Matsuda
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan.
| | - T Morishita
- Institute for Advanced Science, The University of Electro-Communications, 1-5-1 Chofu-ga-oka, Chofu-shi, Tokyo 182-8585, Japan
| | - L B Madsen
- Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark
| | - F Jensen
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
| | - O I Tolstikhin
- Moscow Institute of Physics and Technology, Dolgoprudny 141700, Russia
| | - A Hishikawa
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan. .,Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan
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16
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Ito K, Nakamura T, Hatanaka D, Hasegawa H. A neonatal case of an elongated soft palate. Fukushima J Med Sci 2022; 68:179-181. [PMID: 36047169 PMCID: PMC9840887 DOI: 10.5387/fms.2022-19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The development of stridor and periodic desaturation in a 2-day-old neonate born at term lead to the suspicion of upper airway obstruction. The patient underwent flexible fiberoptic laryngo-tracheo-bronchoscopy and was diagnosed as having an elongated soft palate and secondary mild pharyngomalacia. Early intervention with high PEEP therapy using nasal CPAP led to improvement in the patient condition.
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Affiliation(s)
- Kana Ito
- Department of Neonatology, Japanese Red Cross Musashino Hospital
,
Department of Pediatrics, National Defense Medical College Hospital
| | | | - Daisuke Hatanaka
- Department of Neonatology, Japanese Red Cross Musashino Hospital
| | - Hisaya Hasegawa
- Department of Neonatology, Tokyo Women’s Medical University, Adachi Medical Center
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17
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Yamada Y, Hasegawa H, Ochi T, Yamataka A, Ueda N. Diaphragm pacing for congenital central hypoventilation syndrome: A novel case of pacing implanted into the diaphragm. Pediatr Int 2022; 64:e14915. [PMID: 34921697 DOI: 10.1111/ped.14915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 06/07/2021] [Accepted: 07/07/2021] [Indexed: 11/30/2022]
Affiliation(s)
- Yosuke Yamada
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Hisaya Hasegawa
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Takanori Ochi
- Department of Pediatric General and Urogenital Surgery, Juntendo University School of Medicine, Tokyo, Japan
| | - Atsuyuki Yamataka
- Department of Pediatric General and Urogenital Surgery, Juntendo University School of Medicine, Tokyo, Japan
| | - Naohisa Ueda
- Department of Neurology, Yokohama City University Medical Center, Yokohama, Japan
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18
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Hatanaka D, Nakamura T, Kusakari M, Takahashi H, Hasegawa H. A case of necrotizing tracheobronchitis successfully treated with immunoglobulin. Pediatr Int 2021; 63:1538-1540. [PMID: 34477264 DOI: 10.1111/ped.14670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 01/07/2021] [Accepted: 02/08/2021] [Indexed: 11/29/2022]
Affiliation(s)
- Daisuke Hatanaka
- Department of Neonatology, Japanese Red Cross Musashino Hospital, Tokyo, Japan
| | - Toshihiko Nakamura
- Department of Neonatology, Japanese Red Cross Musashino Hospital, Tokyo, Japan
| | - Michiko Kusakari
- Department of Neonatology, Japanese Red Cross Musashino Hospital, Tokyo, Japan
| | - Hidehiro Takahashi
- Department of Neonatology, Japanese Red Cross Musashino Hospital, Tokyo, Japan
| | - Hisaya Hasegawa
- Division of Neonatal Intensive Care, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
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19
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Wasa M, Hasegawa H, Yamada Y, Mizogami M, Kitamura R. Pharyngomalacia diagnosed by laryngo-tracheo-bronchoscopy in the neonatal intensive care unit. Pediatr Int 2021; 63:1478-1482. [PMID: 33788356 DOI: 10.1111/ped.14714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 03/23/2021] [Accepted: 03/30/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Flexible fiber-optic laryngo-tracheo-bronchoscopy has become widely performed in infants and neonates since the introduction of thin flexible fiberscopes. Laryngomalacia is the most common airway disease in infants causing stridor. Pharyngomalacia, termed pharyngeal occlusion during inspiration, was the second most common airway disease found in our hospital in patients that underwent laryngo-tracheo-bronchoscopy, but the incidence, patient characteristics, and natural course have not been reported in large numbers in Japan. METHODS A retrospective review was performed of medical records on patients admitted to our neonatal intensive care unit during the neonatal period diagnosed with pharyngomalacia between April 2009 and November 2018. Patient characteristics, concurrent airway diseases, comorbidities, and treatment were reviewed. RESULTS Forty-eight patients were diagnosed with pharyngomalacia. The median gestational age was 37.1 weeks, and the median birthweight was 2,552 g. Patients were diagnosed at a median age of 29 days, and cure was achieved at a median age of 4 months. Twenty-eight patients had concurrent airway diseases, laryngomalacia being the most common. Continuous positive airway pressure or high flow nasal cannula was used in 34 patients. CONCLUSIONS In patients with pharyngomalacia, half were born preterm, and more than half had concurrent airway diseases. The onset and diagnosis were made within the first month of life in more than half of the patients, and resolution was seen mostly within the first 6 months of life. Whenever a patient is suspected of having an airway disease, the pharyngeal space should be carefully observed to diagnose pharyngomalacia.
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Affiliation(s)
- Masanori Wasa
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Hisaya Hasegawa
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Yosuke Yamada
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Masae Mizogami
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Rei Kitamura
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
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20
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Mizogami M, Hasegawa H, Yamada Y, Kitamura R, Wasa M. Videoendoscopic evaluation of swallowing using normal saline in NICU infants. Pediatr Int 2021; 63:1472-1477. [PMID: 33709424 DOI: 10.1111/ped.14694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 03/03/2021] [Accepted: 03/10/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND Videoendoscopic evaluation (VE) of swallowing involves inserting a small flexible endoscope transnasally to allow direct observation of pharyngeal and laryngeal structures and swallowing functions. In our neonatal intensive care unit (NICU) VE is performed in infants suspected of severe swallowing dysfunction, using normal saline (NS) with the aim of minimizing the detrimental effect of aspiration on respiration caused by VE. This retrospective study was conducted to evaluate the usefulness of VE using NS in NICU infants. METHODS We enrolled 28 infants who demonstrated clinical signs of swallowing dysfunction or who were ready to start oral feeding. Swallowing evaluations were completed using flexible fiberoptic laryngobronchoscopy (FLB). While observing the pharyngeal and laryngeal cavity with FLB, NS was gradually increased by 1 mL and injected up to a maximum of 3 mL, and the swallowing reflex, tracheal aspiration, and pharyngeal residue were observed. RESULTS Median gestational age was 37 weeks 6 days, median birthweight 2,539 g, and median age at first examination was 107.5 days. Abnormalities in VE were observed in 20 cases, most of which were upper airway lesions. Most of these upper airway abnormalities were pharyngeal lesions. In two pharyngeal lesion cases, swallowing function improved using positive airway pressure. CONCLUSIONS Infants with pharyngeal lesions demonstrated abnormal VE findings. Furthermore, positive airway pressure improved swallowing in some cases, suggesting that narrowing of the pharyngeal cavity may affect swallowing function. In addition, results suggest that VE using NS is a safe and useful method for evaluating swallowing function and determining countermeasures in NICU infants.
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Affiliation(s)
- Masae Mizogami
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Hisaya Hasegawa
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Yosuke Yamada
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Rei Kitamura
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Masanori Wasa
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
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21
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Hasegawa H, Nakamura TKM, Denton RE. Reconstruction of the Electron Diffusion Region With Inertia and Compressibility Effects. J Geophys Res Space Phys 2021; 126:e2021JA029841. [PMID: 35864949 PMCID: PMC9286637 DOI: 10.1029/2021ja029841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 06/15/2023]
Abstract
A method based on electron magnetohydrodynamics (EMHD) for the reconstruction of steady, two-dimensional plasma and magnetic field structures from data taken by a single spacecraft, first developed by Sonnerup et al. (2016), https://doi.org/10.1002/2016ja022430, is extended to accommodate inhomogeneity of the electron density and temperature, electron inertia effects, and guide magnetic field in and around the electron diffusion region (EDR), the central part of the magnetic reconnection region. The new method assumes that the electron density and temperature are constant along, but may vary across, the magnetic field lines. We present two models for the reconstruction of electron streamlines, one of which is not constrained by any specific formula for the electron pressure tensor term in the generalized Ohm's law that is responsible for electron unmagnetization in the EDR, and the other is a modification of the original model to include the inertia and compressibility effects. Benchmark tests using data from fully kinetic simulations show that our new method is applicable to both antiparallel and guide-field (component) reconnection, and the electron velocity field can be better reconstructed by including the inertia effects. The new EMHD reconstruction technique has been applied to an EDR of magnetotail reconnection encountered by the Magnetospheric Multiscale spacecraft on 11 July 2017, reported by Torbert et al. (2018), https://doi.org/10.1126/science.aat2998 and reconstructed with the original inertia-less version by Hasegawa et al. (2019), https://doi.org/10.1029/2018ja026051, which demonstrates that the new method better performs in recovering the electric field and electron streamlines than the original version.
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Affiliation(s)
- H. Hasegawa
- Institute of Space and Astronautical ScienceJapan Aerospace Exploration AgencySagamiharaJapan
| | | | - R. E. Denton
- Department of Physics and AstronomyDartmouth CollegeHanoverNHUSA
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22
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Hasegawa H, Iwahashi M, Kurokawa Y, Yanaoka T. A comparison of mixed-method cooling effects between different body surface area-to-body mass ratio groups in the heat. J Sci Med Sport 2021. [DOI: 10.1016/j.jsams.2021.09.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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Kaneko Y, Nakajima T, Tamura S, Hasegawa H, Kobari T, Nagashima K. Fast-slow atrioventricular nodal reentrant tachycardia phenotype mimicking the slow-slow type. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Fast-slow (F/S-) atrioventricular (AV) nodal reentrant tachycardia (AVNRT) is characterized by a short atrio-His (AH) interval and the earliest site of atrial activation (EAA) in the proximal coronary sinus (EAA-CS), while slow-slow (S/S-) AVNRT presents a long AH interval and EAA-CS. Those intracardiac appearances are initial indicators for making a diagnosis.
Purpose
To identify an unknown phenotype of F/S-AVNRT.
Methods
Among 46 consecutive patients with F/S-AVNRT, 6 patients (1 man, age 59±9) had an apparent but not typical (pseudo-) S/S-AVNRT during an electrophysiologic study. In 2 patients, pseudo-S/S-AVNRT was clinically documented.
Results
In all 6 patients, the diagnosis of F/S-AVNRT was made by an exclusion of atrial tachycardia with findings of 1) a V-A-V response following ventricular entrainment or 2) termination without atrial capture by ventricular pacing, and an exclusion of AV reentrant tachycardia with a ventriculoatrial dissociation during an initial (so-called QRS transition) zone of ventricular entrainment. An initial A-A-V activation sequence on atrial induction of F/S-AVNRT observed in 1 patient and Wenckebach-type AV block during ongoing F/S-AVNRT developing in 3 patients suggested the presence of the lower common pathway (LCP). Like the typical S/S-AVNRT, pseudo-S/S-AVNRT was induced with atrial stimulation after a jump in the AH interval or double ventricular response. However, in all patients, the pseudo-S/S-AVNRT transited to F/S-AVNRT following AV block in a single cycle and/or pseudo-S/S-AVNRT transited from spontaneously or triggered by atrial contractions. Importantly, on these transitions, the atrial cycle length (CL) and EAA-CS remained unchanged, that is, the atrial CL of S/S-AVNRT was almost identical to that of F/S-AVNRT, suggesting that the essential circuit of both tachycardias was identical. Actually, both tachycardias were cured by ablation at a single site in the traditional slow pathway (SP). Collectively, the pseudo-S/S-AVNRT was diagnosed as another phenotype of F/S-AVNRT accompanied by sustained antegrade conduction via another bystander (likely the left-sided or superior) SP breaking through the His bundle owing to the repetitive antegrade block at the LCP occurring by linking phenomenon, thus representing a long AH interval during the ongoing F/S-AVNRT. When the antegrade conduction is blocked at the bystander SP during the pseudo-S/S-AVNRT, releasing the linking phenomenon, the subsequent antegrade conduction reach the His-bundle via the fast pathway, thus returning to F/S-AVNRT.
Conclusions
An unknown, but not rare F/S-AVNRT phenotype exists that apparently mimics the typical S/S-AVNRT and is also an unknown subtype of apparent S/S-AVNRT. The presence of this pseudo-S/S-AVNRT suggests the limitation of classifying types of AVNRT based on AH and HA intervals during tachycardia. Understandings of this phenotype can advance a diagnosis of atypical AVNRT with multiple phenotypes.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- Y Kaneko
- Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - T Nakajima
- Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - S Tamura
- Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - H Hasegawa
- Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - T Kobari
- Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - K Nagashima
- Nihon University School of Medicine, Division of Cardiology, Department of Medicine, Tokyo, Japan
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24
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Takeda Y, Kin T, Sekine T, Hasegawa H, Suzuki Y, Uchikawa H, Koike T, Kiyofuji S, Shinya Y, Kawashima M, Saito N. Hemodynamic Analysis of Cerebral AVMs with 3D Phase-Contrast MR Imaging. AJNR Am J Neuroradiol 2021; 42:2138-2145. [PMID: 34620595 DOI: 10.3174/ajnr.a7314] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 07/28/2021] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The hemodynamics associated with cerebral AVMs have a significant impact on their clinical presentation. This study aimed to evaluate the hemodynamic features of AVMs using 3D phase-contrast MR imaging with dual velocity-encodings. MATERIALS AND METHODS Thirty-two patients with supratentorial AVMs who had not received any previous treatment and had undergone 3D phase-contrast MR imaging were included in this study. The nidus diameter and volume were measured for classification of AVMs (small, medium, or large). Flow parameters measured included apparent AVM inflow, AVM inflow index, apparent AVM outflow, AVM outflow index, and the apparent AVM inflow-to-outflow ratio. Correlation coefficients between the nidus volume and each flow were calculated. The flow parameters between small and other AVMs as well as between nonhemorrhagic and hemorrhagic AVMs were compared. RESULTS Patients were divided into hemorrhagic (n = 8) and nonhemorrhagic (n = 24) groups. The correlation coefficient between the nidus volume and the apparent AVM inflow and outflow was .83. The apparent AVM inflow and outflow in small AVMs were significantly smaller than in medium AVMs (P < .001 for both groups). The apparent AVM inflow-to-outflow ratio was significantly larger in the hemorrhagic AVMs than in the nonhemorrhagic AVMs (P = .02). CONCLUSIONS The apparent AVM inflow-to-outflow ratio was the only significant parameter that differed between nonhemorrhagic and hemorrhagic AVMs, suggesting that a poor drainage system may increase AVM pressure, potentially causing cerebral hemorrhage.
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Affiliation(s)
- Y Takeda
- From the Department of Neurosurgery (Y.T., T.K., H.H., H.U., T.K., S.K., Y. Shinya, M.K., N.S.)
| | - T Kin
- From the Department of Neurosurgery (Y.T., T.K., H.H., H.U., T.K., S.K., Y. Shinya, M.K., N.S.)
| | - T Sekine
- Department of Radiology (T.S.), Nippon Medical School Musashi-kosugi Hospital, Kanagawa, Japan
| | - H Hasegawa
- From the Department of Neurosurgery (Y.T., T.K., H.H., H.U., T.K., S.K., Y. Shinya, M.K., N.S.)
| | - Y Suzuki
- Radiology (Y.Suzuki), The University of Tokyo, Tokyo, Japan
| | - H Uchikawa
- From the Department of Neurosurgery (Y.T., T.K., H.H., H.U., T.K., S.K., Y. Shinya, M.K., N.S.)
| | - T Koike
- From the Department of Neurosurgery (Y.T., T.K., H.H., H.U., T.K., S.K., Y. Shinya, M.K., N.S.)
| | - S Kiyofuji
- From the Department of Neurosurgery (Y.T., T.K., H.H., H.U., T.K., S.K., Y. Shinya, M.K., N.S.)
| | - Y Shinya
- From the Department of Neurosurgery (Y.T., T.K., H.H., H.U., T.K., S.K., Y. Shinya, M.K., N.S.)
| | - M Kawashima
- From the Department of Neurosurgery (Y.T., T.K., H.H., H.U., T.K., S.K., Y. Shinya, M.K., N.S.)
| | - N Saito
- From the Department of Neurosurgery (Y.T., T.K., H.H., H.U., T.K., S.K., Y. Shinya, M.K., N.S.)
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25
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Ozawa T, Miura N, Hasegawa H, Uemura T, Nakamoto Y, Tsujio M, Takeuchi T, Shiraishi M. Characteristics and outcome of suspected cerebrovascular disease in dogs: 66 cases (2009-2016). J Small Anim Pract 2021; 63:45-51. [PMID: 34585398 DOI: 10.1111/jsap.13422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 05/27/2021] [Accepted: 08/17/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To characterise the clinical signs of suspected cerebrovascular disease in dogs. MATERIALS AND METHODS Medical records of one hospital were searched from November 2009 to December 2016 for dogs that suffered of cerebrovascular disease. We diagnosed cerebrovascular disease based on acute onset, clinical signs and magnetic resonance imaging findings. The medical history, clinical signs, concurrent disease, area of infarction, cerebrospinal fluid results, month at onset and outcome were investigated in the cerebrovascular disease group and in a control group (dogs with brain disorders other than cerebrovascular disease). RESULTS A total of 122 CVD cases were extracted from the 5312 patients that visited during the study period. Of these 122 cases, 66 (1.2%) matched the subject selection criteria of our study and were included in the analysis. Forebrain infarction was observed in 51 of 66 cases, of which 24 (47.1%) suffered from seizures. The number of dogs diagnosed with cerebrovascular disease was disproportionately high in August (nine of 59 cases) and December (13 of 59 cases). In the outcome survey, deterioration was observed in 11 of 55 cases. CLINICAL SIGNIFICANCE Seizure is an important clinical sign of cerebrovascular disease in dogs. There was a significant seasonal variation in the number of dogs diagnosed with cerebrovascular disease in Japan. Clinical features observed in this report differ from those of previous reports and highlight the need for additional research in this area.
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Affiliation(s)
- T Ozawa
- KyotoAR Veterinary Neurology Center, Kyoto, 613-0036, Japan.,The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi, 753-8515, Japan
| | - N Miura
- Veterinary Teaching Hospital, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, 890-0065, Japan
| | - H Hasegawa
- KyotoAR Veterinary Neurology Center, Kyoto, 613-0036, Japan
| | - T Uemura
- KyotoAR Veterinary Neurology Center, Kyoto, 613-0036, Japan
| | | | - M Tsujio
- Laboratory of Veterinary Anatomy, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, 890-0065, Japan
| | - T Takeuchi
- Department of Veterinary Laboratory Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori, 680-8553, Japan
| | - M Shiraishi
- Department of Veterinary Physiology, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima, 890-0065, Japan
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26
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Matsuyama T, Endo H, Yamamoto H, Takemasa I, Uehara K, Hanai T, Miyata H, Kimura T, Hasegawa H, Kakeji Y, Inomata M, Kitagawa Y, Kinugasa Y. Outcomes of robot-assisted versus conventional laparoscopic low anterior resection in patients with rectal cancer: propensity-matched analysis of the National Clinical Database in Japan. BJS Open 2021; 5:6374226. [PMID: 34553225 PMCID: PMC8458638 DOI: 10.1093/bjsopen/zrab083] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 08/02/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Robot-assisted laparoscopic surgery has several advantages over conventional laparoscopy. However, population-based comparative studies for low anterior resection are limited. This article aimed to compare peri-operative results of robot-assisted low anterior resection (RALAR) and laparoscopy. METHODS This retrospective cohort study used data from patients treated with RALAR or conventional laparoscopic low anterior resection (CLLAR) between October 2018 and December 2019, as recorded in the Japanese National Clinical Database, a data set registering clinical information, perioperative outcomes, and mortality. Of note, the registry does not include information on the tumour location (centimetres from the anal verge) and diverting stoma creation. Perioperative outcomes, including rate of conversion to open surgery, were compared between RALAR and CLLAR groups. Confounding factors were adjusted for using propensity score matching. RESULTS Of 21 415 patients treated during the study interval, 20 220 were reviewed. Two homogeneous groups of 2843 patients were created by propensity score matching. The conversion rate to open surgery was significantly lower in the RALAR group than in the CLLAR group (0.7 versus 2.0 per cent; P < 0.001). The RALAR group had a longer operating time (median: 352 versus 283 min; P < 0.001), less intraoperative blood loss (15 versus 20 ml; P < 0.001), a lower in-hospital mortality rate (0.1 versus 0.5 per cent; P = 0.007), and a shorter postoperative hospital stay (median: 13 versus 14 days; P < 0.001) compared with the CLLAR group. The CLLAR group had a lower rate of readmission within 30 days (2.4 versus 3.3 per cent; P = 0.045). CONCLUSION These data highlight the reduced conversion rate, in-hospital mortality rate, intraoperative blood loss, and length of postoperative hospital stay for rectal cancer surgery in patients treated using robot-assisted laparoscopic surgery compared with laparoscopic low anterior resection.
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Affiliation(s)
- T Matsuyama
- Department of Gastrointestinal Surgery, Tokyo Medical and Dental University Graduate School of Medicine, Tokyo, Japan
| | - H Endo
- Department of Healthcare Quality Assessment, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - H Yamamoto
- Department of Healthcare Quality Assessment, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - I Takemasa
- Department of Surgery, Surgical Oncology and Science, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - K Uehara
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Aichi, Japan
| | - T Hanai
- Department of Surgery, Fujita Health University School of Medicine, Aichi, Japan
| | - H Miyata
- Department of Healthcare Quality Assessment, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - T Kimura
- Project Management Subcommittee, Japanese Society of Gastroenterological Surgery, Tokyo, Japan
| | - H Hasegawa
- Project Management Subcommittee, Japanese Society of Gastroenterological Surgery, Tokyo, Japan
| | - Y Kakeji
- Database Committee, Japanese Society of Gastroenterological Surgery, Tokyo, Japan
| | - M Inomata
- Department of Gastroenterological and Paediatric Surgery, Oita University Faculty of Medicine, Oita, Japan
| | - Y Kitagawa
- Japanese Society of Gastroenterological Surgery, Tokyo, Japan
| | - Y Kinugasa
- Department of Gastrointestinal Surgery, Tokyo Medical and Dental University Graduate School of Medicine, Tokyo, Japan
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27
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Yamada Y, Henmi N, Hasegawa H, Tsuruta S, Tokumasu S, Suganami Y, Wasa M. Ventilatory response to CO 2 with Read's rebreathing method in normal infants. Pediatr Pulmonol 2021; 56:2259-2264. [PMID: 33751855 DOI: 10.1002/ppul.25365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 11/09/2022]
Abstract
BACKGROUND Methods of evaluating the ventilatory response to CO2 (VRCO2 ) of the respiratory center include the steady-state and the rebreathing method. Although the rebreathing method can evaluate the ventilatory response continuously to gradually increasing CO2 , the rebreathing method has been rarely performed in infants. The aim of this study was to investigate whether we could perform the VRCO2 with the rebreathing method in normal infants. METHODS The subjects were 80 normal infants. The gestational age was 39.9 (39.3-40.3) weeks, and the birth body weight was 3142 (2851-3451) grams. We performed the VRCO2 with Read's rebreathing method, measuring the increase in minute volume (MV) in response to the increase in EtCO2 by rebreathing a closed circuit. The value of VRCO2 was calculated as follow: VRCO2 (ml/min/mmHg/kg) = ΔMV/ΔEtCO2 /body weight. RESULTS We performed the examination without adverse events. The age in days at examination was 3 (2-4), and the examination time was 150 ± 38 s. The maximum EtCO2 was 51.1 (50.5-51.9) mmHg. The value of VRCO2 was 34.6 (29.3-42.8). The intraclass correlation coefficient of the VRCO2 of cases with multiple measurements was 0.79. CONCLUSION This study suggests that the rebreathing method can evaluate the ventilatory response to high blood CO2 in a short examination time. We conclude that the rebreathing method is useful even in infants. In the future, we plan to measure the VRCO2 of preterm infants, and evaluate the respiratory center of infants in more detail.
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Affiliation(s)
- Yosuke Yamada
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Nobuhide Henmi
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Hisaya Hasegawa
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Shio Tsuruta
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Satoko Tokumasu
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Yusuke Suganami
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Masanori Wasa
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
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28
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Seishima R, Miyata H, Okabayashi K, Hasegawa H, Tsuruta M, Shigeta K, Monno M, Yamashita Y, Inomata M, Wakabayashi G, Kakeji Y, Kitagawa Y, Watanabe M. Safety and feasibility of laparoscopic surgery for elderly rectal cancer patients in Japan: a nationwide study. BJS Open 2021; 5:6220252. [PMID: 33839748 PMCID: PMC8038266 DOI: 10.1093/bjsopen/zrab007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 01/14/2021] [Indexed: 11/30/2022] Open
Abstract
Background This study aimed to analyse the perioperative results from a national dataset of rectal cancer resections in elderly patients. Methods The clinical records of patients undergoing rectal cancer surgery between 2012 and 2014 were retrieved from the Japanese National Clinical Database and analysed retrospectively. Patients were categorized according to age and those 80 years or older were defined as elderly. Subgroups were also defined according to the surgical approach (laparoscopy versus open surgery). The short-term outcomes, including mortality, anastomotic leak, surgical site infections and medical complications were compared between subgroups. Results Of 56 175 patients undergoing rectal cancer surgery, some 6717 patients were elderly and laparoscopy was performed in 46.8 per cent of the sample. When comparing laparoscopy and open surgery in elderly patients, the operative mortality rate (1.5 versus 2.8 per cent; P < 0.001), the incidence of anastomotic leakage (5.2 versus 6.5 per cent; P = 0.026), surgical site infections (6.0 versus 8.0 per cent; P = 0.001), pneumonia (1.4 versus 2.5 per cent; P = 0.001), renal failure (0.7 versus 1.3 per cent; P = 0.016) and cardiac events (0.3 versus 0.8 per cent; P = 0.008) were lower for laparoscopy than for open surgery. The overall complication rate in elderly patients (19.5 per cent) was comparable to that in the younger group (P = 0.07). However, incidence of systemic complications was significantly higher in elderly than in younger patients (all P < 0.001). Conclusion Laparoscopy was safe and feasible in elderly patients compared with open surgery. However, the rates of systemic complications were significantly higher than in younger patients.
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Affiliation(s)
- R Seishima
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - H Miyata
- Department of Health Policy and Management, Keio University School of Medicine, Tokyo, Japan
| | - K Okabayashi
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - H Hasegawa
- Department of Surgery, Tokyo Dental College Ichikawa General Hospital, Ichikawa, Japan
| | - M Tsuruta
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - K Shigeta
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - M Monno
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Y Yamashita
- Department of Gastroenterological Surgery, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - M Inomata
- Department of Gastroenterological and Pediatric Surgery, Faculty of Medicine, Oita University, Yufu, Japan
| | - G Wakabayashi
- Department of Surgery, Ageo Central General Hospital, Ageo, Japan
| | - Y Kakeji
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan.,Database Committee, The Japanese Society of Gastroenterological Surgery
| | - Y Kitagawa
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan.,The Japanese Society of Gastroenterological Surgery
| | - M Watanabe
- Department of Surgery, Kitasato University Kitasato Institute Hospital, Sagamihara, Japan
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29
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Sugita Y, Nakamura T, Sawada R, Takiguchi G, Urakawa N, Hasegawa H, Yamamoto M, Kanaji S, Matsuda Y, Yamashita K, Matsuda T, Oshikiri T, Suzuki S, Kakeji Y. Safety and feasibility of minimally invasive esophagectomy for elderly esophageal cancer patients. Dis Esophagus 2021; 34:5902470. [PMID: 32895704 DOI: 10.1093/dote/doaa083] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 06/27/2020] [Accepted: 07/23/2020] [Indexed: 12/11/2022]
Abstract
The number of elderly patients with esophageal cancer has increased in recent years. The use of thoracoscopic esophagectomy has also increased, and its minimal invasiveness is believed to contribute to postoperative outcomes. However, the short- and long-term outcomes in elderly patients remain unclear. This study aimed to elucidate the safety and feasibility of minimally invasive esophagectomy in elderly patients. This retrospective study included 207 patients who underwent radical thoracoscopic esophagectomy for thoracic esophageal squamous cell carcinoma at Kobe University Hospital between 2005 and 2014. Patients were divided into non-elderly (<75 years) and elderly (≥75 years) groups. A propensity score matching analysis was performed for sex and clinical T and N stage, with a total of 29 matched pairs. General preoperative data, surgical procedures, intraoperative data, postoperative complications, in-hospital death, cancer-specific survival, and overall survival were compared between groups. The elderly group was characterized by lower preoperative serum albumin levels and higher American Society of Anesthesiologists grade. Intraoperative data and postoperative complications did not differ between the groups. The in-hospital death rate was 4% in the elderly group, which did not significantly differ from the non-elderly group. Cancer-specific survival was similar between the two groups. Although overall survival tended to be poor in the elderly group, it was not significantly worse than that of the non-elderly group. In conclusion, the short- and long-term outcomes of minimally invasive esophagectomy in elderly versus non-elderly patients were acceptable. Minimally invasive esophagectomy is a safe and feasible modality for elderly patients with appropriate indications.
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Affiliation(s)
- Y Sugita
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - T Nakamura
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - R Sawada
- Colorectal Surgery Department, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - G Takiguchi
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - N Urakawa
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - H Hasegawa
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - M Yamamoto
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - S Kanaji
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Y Matsuda
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - K Yamashita
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - T Matsuda
- Division of Minimally Invasive Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - T Oshikiri
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - S Suzuki
- Division of Community Medicine and Medical Network, Department of Social Community Medicine and Health Science, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Y Kakeji
- Division of Gastrointestinal Surgery, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
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30
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Mori M, Watabe S, Taguchi T, Hasegawa H, Ishige M, Tanuma N, Hirakawa A, Koike R, Kusuda S. Study protocol: a multicenter, uncontrolled, open-label study of palivizumab in neonates, infants, and preschool children at high risk of severe respiratory syncytial virus infection. BMC Pediatr 2021; 21:106. [PMID: 33653291 PMCID: PMC7923811 DOI: 10.1186/s12887-021-02567-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 02/24/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The prophylactic use of anti-respiratory syncytial virus (RSV) antibody (palivizumab) for severe RSV infection is not approved in Japan in specified groups of infants with neuromuscular diseases or other rare diseases associated with reduced ventilation competence or difficulty in expectoration, which increase the risk of exacerbation of severe RSV infection. The objective of this study is to investigate the efficacy, safety, and pharmacokinetics of palivizumab in pediatric patients with those rare diseases for which palivizumab is not indicated at present. METHODS/DESIGN This study is a multicenter, uncontrolled, open-label study planned to be carried out between July 1, 2019 and June 30, 2022 at 7 medical institutions in Japan. The study population will be recruited from among neonates, infants, or children aged 24 months or younger with a condition falling under any of the following 5 disease groups: pulmonary hypoplasia, airway stenosis, congenital esophageal atresia, inherited metabolic disease, or neuromuscular disease. The planned sample size is 18 subjects, including at least 3 subjects per disease group. Throughout the RSV season, at least 4 continuous doses of palivizumab will be administered intramuscularly at 15 mg/kg at intervals of 30 days. The efficacy and safety of palivizumab will be comprehensively evaluated based on the incidence of RSV-related hospitalization, and serum palivizumab concentration, serum anti-palivizumab antibody concentration, and the occurrence of adverse events/reactions after the start of palivizumab treatment. DISCUSSION This study will evaluate the efficacy and safety of palivizumab in pediatric patients with rare diseases which place them at high risk of severe RSV infection, but which fall outside the current indications for palivizumab prophylaxis. The generated data will have implications for the regulatory approval of prophylactic palivizumab treatment in this patient group. TRIAL REGISTRATION This study has been prospectively registered in Japic Clinical Trials Information, which is managed and administered by the Japan Pharmaceutical Information Center (registration number: JapicCTI-194946 , registration date: September 10, 2019).
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Affiliation(s)
- Masaaki Mori
- Department of Pediatrics, Tokyo Medical and Dental University Medical Hospital, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan.
| | - Shinichi Watabe
- Department of Pediatrics, Kurashiki Central Hospital, 1-1-1 Miwa, Kurashiki, Okayama, 710-8602, Japan
| | - Tomoaki Taguchi
- Department of Pediatric Surgery, Kyushu University Hospital, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.,present affiliation: Fukuoka College of Health Science, 2-15-1 Tamura, Sawara-ku, Fukuoka, 814-0193, Japan
| | - Hisaya Hasegawa
- Division of Neonatal Intensive Care, Tokyo Women's Medical University Medical Center East, 2-1-10 Nishiogu, Arakawa-ku, Tokyo, 116-8567, Japan
| | - Mika Ishige
- Department of Pediatrics and Child Health, Nihon University School of Medicine, 1-6 Kanda Surugadai, Chiyoda-ku, Tokyo, 101-8309, Japan
| | - Naoyuki Tanuma
- Department of Pediatrics, Tokyo Metropolitan Fuchu Medical Center for the Disabled, 2-9-2 Musashidai, Fuchu, Tokyo, 183-8553, Japan
| | - Akihiro Hirakawa
- Clinical Research Center, Tokyo Medical and Dental University Medical Hospital, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Ryuji Koike
- Clinical Research Center, Tokyo Medical and Dental University Medical Hospital, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Satoshi Kusuda
- Department of Pediatrics, Faculty of Medicine, Kyorin University, 6-20-2 Shinkawa, Mitaka, Tokyo, 181-8611, Japan
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31
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Yamada Y, Hasegawa H, Henmi N, Tsuruta S, Wasa M, Kihara H, Kodera T, Kouyama T, Kumazawa K. Evaluation of respiratory center function in congenital central hypoventilation syndrome by monitoring electrical activity of the diaphragm. Pediatr Int 2021; 63:168-171. [PMID: 32573869 DOI: 10.1111/ped.14359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/08/2020] [Accepted: 06/17/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND A definitive diagnosis of congenital central hypoventilation syndrome (CCHS) is made by genetic testing. However, there are only a few examinations that warrant genetic testing. Electrical activity of the diaphragm (Edi) reflects neural respiratory drive from respiratory center to diaphragm. We evaluated the function of the respiratory center in CCHS by Edi monitoring. METHODS Monitoring of Edi was performed in six CCHS cases without mechanical ventilation. The monitoring time was 30 consecutive minutes from wakefulness to sleep. The TcPCO2 or EtCO2 and SpO2 were recorded simultaneously. RESULTS The Edi peak during wakefulness was 14.0 (10.3-21.0) µV and the Edi peak during sleep was 6.7 (3.8-8.0) µV. The Edi peak during sleep was significantly lower than the Edi peak during wakefulness, and patients were in a state of hypoventilation. Although TcPCO2 or EtCO2 increased due to hypoventilation, an increase in the Edi peak that reflects central respiratory drive was not observed. ΔEdi/ΔCO2 was -0.06μV/mmHg. Maximum EtCO2 or TcPco2 was 51 mmHg, and the average SpO2 was 91.5% during monitoring. CONCLUSIONS We confirmed that Edi monitoring could evaluate the function of the respiratory center and reproduce the hypoventilation of CCHS. The present study suggested that Edi monitoring is a useful examination in deciding whether to perform genetic testing or not and it may lead to an early diagnosis of CCHS.
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Affiliation(s)
- Yosuke Yamada
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Hisaya Hasegawa
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Nobuhide Henmi
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Shio Tsuruta
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Masanori Wasa
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Hirotaka Kihara
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Takayuki Kodera
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Toshinari Kouyama
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
| | - Kensuke Kumazawa
- Department of Neonatology, Tokyo Women's Medical University Medical Center East, Tokyo, Japan
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32
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Ota K, Kaku N, Uno N, Sakamoto K, Morinaga Y, Hasegawa H, Miyazaki T, Izumikawa K, Mukae H, Yanagihara K. The effectiveness of meropenem and amikacin combination therapy against Carbapenemase-producing Klebsiella pneumoniae pneumonia mouse model. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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33
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Hasegawa H, Kono T, Sakane K, Matsuoka T, Soyama A, Murakami S, Hoshiga M. Increased oxygen uptake and utilization in the peripheral muscles, rather than cardiac function reserve, may be determinants of increased peak VO2 by cardiac rehabilitation in heart failure. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Peak oxygen consumption (peak VO2) is a major prognostic parameter in heart failure (HF). Previous studies have shown a relationship between peak VO2 and impaired oxygen uptake and utilization in the peripheral muscles. The purpose of this study was to clarify the determinant of increased peak VO2 by cardiac rehabilitation (CR) in patients with HF.
Methods
We performed echocardiography during upright ramp bicycle cardiopulmonary exercise test in 30 HF patients (61±1 years of age, 80% male) before and 6 months after CR. HR reserve was determined as the change in HR from rest to peak exercise, expressed as a percentage of the predicted maximal HR reserve. Elastance index (EAI) and LV end-systolic elastance index (ELVI) were derived as the ratio of end-systolic pressure to stroke volume index and end-systolic volume index, respectively. End-systolic pressure was estimated from the equation 0.9 × brachial systolic blood pressure. Ventriculo-arterial coupling (VAC) was calculated as the quotient of EAI and ELVI. The ratio of LDEDVI to E/e' mean was used to evaluate LV diastolic compliance. Systemic vascular resistance index was calculated as mean arterial pressure divided by echocardiography calculated cardiac index and multiplied by 80. The arterial venous oxygen content difference (C (A-V) O2 gradient) was calculated by using the Fick equation as: VO2/echocardiography calculated cardiac output.
Results
Peak VO2 and C (A-V) O2 gradient were increased by CR. However, heart rate reserve, systolic reserve, VAC, diastolic reserve and vasodilation reserve were unchanged by CR (Table 1).
Conclusions
Increased oxygen uptake and utilization in the peripheral muscles, rather than cardiac function reserve, may be determinants of increased peak VO2 by CR in HF.
Table 1
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | - T Kono
- Soseikai General Hospital, Cardiology, Kyoto, Japan
| | - K Sakane
- Osaka Medical College, Takatsuki, Japan
| | - T Matsuoka
- Soseikai General Hospital, Cardiology, Kyoto, Japan
| | - A Soyama
- Soseikai General Hospital, Cardiology, Kyoto, Japan
| | - S Murakami
- Soseikai General Hospital, Cardiology, Kyoto, Japan
| | - M Hoshiga
- Osaka Medical College, Takatsuki, Japan
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Nakamura TKM, Plaschke F, Hasegawa H, Liu Y, Hwang K, Blasl KA, Nakamura R. Decay of Kelvin-Helmholtz Vortices at the Earth's Magnetopause Under Pure Southward IMF Conditions. Geophys Res Lett 2020; 47:e2020GL087574. [PMID: 32999512 PMCID: PMC7507125 DOI: 10.1029/2020gl087574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 05/20/2020] [Accepted: 06/05/2020] [Indexed: 06/11/2023]
Abstract
At the Earth's low-latitude magnetopause, clear signatures of the Kelvin-Helmholtz (KH) waves have been frequently observed during periods of the northward interplanetary magnetic field (IMF), whereas these signatures have been much less frequently observed during the southward IMF. Here, we performed the first 3-D fully kinetic simulation of the magnetopause KH instability under the southward IMF condition. The simulation demonstrates that fast magnetic reconnection is induced at multiple locations along the vortex edge in an early nonlinear growth phase of the instability. The reconnection outflow jets significantly disrupt the flow of the nonlinear KH vortex, while the disrupted turbulent flow strongly bends and twists the reconnected field lines. The resulting coupling of the complex field and flow patterns within the magnetopause boundary layer leads to a quick decay of the vortex structure, which may explain the difference in the observation probability of KH waves between northward and southward IMF conditions.
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Affiliation(s)
| | - F. Plaschke
- Space Research InstituteAustrian Academy of SciencesGrazAustria
| | - H. Hasegawa
- Institute of Space and Astronautical ScienceJapan Aerospace Exploration AgencySagamiharaJapan
| | - Y.‐H. Liu
- Department of Physics and AstronomyDartmouth CollegeHanoverNHUSA
| | - K.‐J. Hwang
- Southwest Research InstituteSan AntonioTXUSA
| | - K. A. Blasl
- Space Research InstituteAustrian Academy of SciencesGrazAustria
- Institute of PhysicsUniversity of GrazGrazAustria
| | - R. Nakamura
- Space Research InstituteAustrian Academy of SciencesGrazAustria
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35
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Takeda H, Kimura G, Nozaki S, Shibasaki M, Hasegawa H, Nodotsuka N, Amakawa R, Minaguchi S, Mikami H, Yanagi M, Akatsuka J, Endo Y, Hayashi T, Kondo Y. Early therapeutic intervention improves radiation induced hemorrhagic cystitis and proctitis when treated with hyperbaric oxygen therapy. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33308-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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36
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Fukui S, Ichinose K, Sada KE, Miyamoto J, Harigai M, Amano K, Atsumi T, Takasaki Y, Dobashi H, Arimura Y, Hasegawa H, Yuzawa Y, Yamagata K, Tsuboi N, Maruyama S, Matsuo S, Makino H, Maeda T, Kawakami A. Complement profile in microscopic polyangiitis and granulomatosis with polyangiitis: analysis using sera from a nationwide prospective cohort study. Scand J Rheumatol 2020; 49:301-311. [PMID: 32286129 DOI: 10.1080/03009742.2019.1695927] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVE The complement cascade, especially the alternative pathway of complement, has been shown in basic research to be associated with anti-neutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis (AAV). We aimed to elucidate relationships between serum complement components and clinical characteristics in AAV. METHOD In a nationwide prospective cohort study (RemIT-JAV-RPGN), we measured the serum levels of C1q, C2, C3, C3b/iC3b, C4, C4b, C5, C5a, C9, factor B, factor D, factor H, factor I, mannose-binding lectin, and properdin in 52 patients with microscopic polyangiitis (MPA) and 39 patients with granulomatosis with polyangiitis (GPA). RESULTS The properdin level of MPA and GPA was significantly lower than that of healthy donors. The properdin level was negatively correlated with the Birmingham Vasculitis Activity Score (BVAS) (ρ = -0.2148, p = 0.0409). The factor D level at 6 months was significantly positively correlated with the Vasculitis Damage Index (VDI) at 6, 12, and 24 months (ρ = 0.4207, 0.4132, and 0.3115, respectively). Patients with a higher ratio of C5a to C5 had higher neutrophil percentage and serum immunoglobulin G levels, and significantly lower creatinine levels. Cluster analysis divided the MPA and GPA patients into three subgroups. A principal component (PC) analysis aggregated 15 types of complements into alternative pathway-related PC 1 and complement classical pathway and common pathway-related PC 2. CONCLUSIONS The serum levels of properdin and factor D were correlated with the BVAS and the VDI in MPA and GPA, respectively. Our analyses suggested the pathological heterogeneity of MPA and GPA from the aspect of complement components.
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Affiliation(s)
- S Fukui
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, Japan.,Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, Japan
| | - K Ichinose
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, Japan
| | - K-E Sada
- Department of Nephrology, Rheumatology, Endocrinology and Metabolism, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , Okayama, Japan
| | - J Miyamoto
- Nagasaki University Hospital Clinical Research Center , Nagasaki, Japan
| | - M Harigai
- Division of Epidemiology and Pharmacoepidemiology of Rheumatic Diseases, Department of Rheumatology, School of Medicine, Tokyo Women's Medical University , Tokyo, Japan
| | - K Amano
- Department of Rheumatology and Clinical Immunology, Saitama Medical Center, Saitama Medical University , Kawagoe, Japan
| | - T Atsumi
- Department of Rheumatology, Endocrinology and Nephrology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University , Sapporo, Japan
| | - Y Takasaki
- Department of Rheumatology, Graduate School of Medicine, Juntendo University , Tokyo, Japan
| | - H Dobashi
- Division of Endocrinology and Metabolism, Haematology, Rheumatology and Respiratory Medicine, Department of Internal Medicine, Faculty of Medicine, Kagawa University , Miki-cho, Japan
| | - Y Arimura
- Nephrology and Rheumatology, First Department of Internal Medicine, Kyorin University School of Medicine , Tokyo, Japan
| | - H Hasegawa
- Department of Hematology, Clinical Immunology and Infectious Diseases, Ehime University Graduate School of Medicine , Toon, Japan
| | - Y Yuzawa
- Department of Nephrology, Fujita Health University School of Medicine , Toyoake, Japan
| | - K Yamagata
- Department of Nephrology, Faculty of Medicine, University of Tsukuba , Tsukuba, Japan
| | - N Tsuboi
- Department of Nephrology, Internal Medicine, Nagoya University Graduate School of Medicine , Nagoya, Japan
| | - S Maruyama
- Department of Nephrology, Internal Medicine, Nagoya University Graduate School of Medicine , Nagoya, Japan
| | - S Matsuo
- Department of Nephrology, Internal Medicine, Nagoya University Graduate School of Medicine , Nagoya, Japan
| | - H Makino
- Okayama University , Okayama, Japan
| | - T Maeda
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, Japan.,Department of General Medicine, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, Japan
| | - A Kawakami
- Department of Immunology and Rheumatology, Nagasaki University Graduate School of Biomedical Sciences , Nagasaki, Japan
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37
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Matsui S, Okabayashi K, Hasegawa H, Tsuruta M, Shigeta K, Ishida T, Yamada T, Kondo T, Yamauchi S, Sugihara K, Kitagawa Y. Effect of high ligation on survival of patients undergoing surgery for primary colorectal cancer and synchronous liver metastases. BJS Open 2020; 4:508-515. [PMID: 32243733 PMCID: PMC7260402 DOI: 10.1002/bjs5.50274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/29/2020] [Accepted: 02/03/2020] [Indexed: 11/25/2022] Open
Abstract
Background Although R0 surgery is recommended for stage IV colorectal cancer, the degree of required lymphadenectomy has not been established. The aim of this study was to investigate the prognostic impact of high ligation (HL) of the feeding artery and the number of retrieved lymph nodes after R0 surgery for colorectal cancer and synchronous colorectal cancer liver metastasis (CRLM). Methods This was a multi‐institutional retrospective analysis of patients with colorectal cancer and synchronous CRLM who had R0 surgery between January 1997 and December 2007. Clinical and pathological features were compared in patients who underwent HL and those who had a low ligation (LL). Kaplan–Meier analysis was performed to estimate the effect of HL on overall survival (OS). The impact of several risk factors on survival was analysed using the Cox proportional hazards model. Results Of 549 patients, 409 (74·5 per cent) had HL. Median follow‐up was 51·4 months. HL significantly improved the 5‐year OS rate (58·2 per cent versus 49·3 per cent for LL; P = 0·017). Multivariable analysis revealed HL to be a significant prognostic factor compared with LL (5‐year mortality: hazard ratio (HR) 0·68, 95 per cent c.i. 0·51 to 0·90; P = 0·007). In subgroup analysis, the positive effect of HL on OS was greatest in patients with lymph node metastasis. Conclusion HL of the feeding artery was associated with improved OS in patients with colorectal cancer and synchronous CRLM after R0 surgery.
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Affiliation(s)
- S Matsui
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - K Okabayashi
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - H Hasegawa
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan.,Department of Surgery, Tokyo Dental College Ichikawa General Hospital, Chiba, Japan
| | - M Tsuruta
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - K Shigeta
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - T Ishida
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - T Yamada
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - T Kondo
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
| | - S Yamauchi
- Department of Surgical Oncology, Tokyo Medical and Dental University, Tokyo, Japan
| | - K Sugihara
- Department of Surgical Oncology, Tokyo Medical and Dental University, Tokyo, Japan
| | - Y Kitagawa
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
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38
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Hwang K, Dokgo K, Choi E, Burch JL, Sibeck DG, Giles BL, Hasegawa H, Fu HS, Liu Y, Wang Z, Nakamura TKM, Ma X, Fear RC, Khotyaintsev Y, Graham DB, Shi QQ, Escoubet CP, Gershman DJ, Paterson WR, Pollock CJ, Ergun RE, Torbert RB, Dorelli JC, Avanov L, Russell CT, Strangeway RJ. Magnetic Reconnection Inside a Flux Rope Induced by Kelvin-Helmholtz Vortices. J Geophys Res Space Phys 2020; 125:e2019JA027665. [PMID: 32714734 PMCID: PMC7375157 DOI: 10.1029/2019ja027665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 01/29/2020] [Accepted: 03/03/2020] [Indexed: 06/11/2023]
Abstract
On 5 May 2017, MMS observed a crater-type flux rope on the dawnside tailward magnetopause with fluctuations. The boundary-normal analysis shows that the fluctuations can be attributed to nonlinear Kelvin-Helmholtz (KH) waves. Reconnection signatures such as flow reversals and Joule dissipation were identified at the leading and trailing edges of the flux rope. In particular, strong northward electron jets observed at the trailing edge indicated midlatitude reconnection associated with the 3-D structure of the KH vortex. The scale size of the flux rope, together with reconnection signatures, strongly supports the interpretation that the flux rope was generated locally by KH vortex-induced reconnection. The center of the flux rope also displayed signatures of guide-field reconnection (out-of-plane electron jets, parallel electron heating, and Joule dissipation). These signatures indicate that an interface between two interlinked flux tubes was undergoing interaction, causing a local magnetic depression, resulting in an M-shaped crater flux rope, as supported by reconstruction.
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Affiliation(s)
- K.‐J. Hwang
- Southwest Research InstituteSan AntonioTXUSA
| | - K. Dokgo
- Southwest Research InstituteSan AntonioTXUSA
| | - E. Choi
- Southwest Research InstituteSan AntonioTXUSA
| | - J. L. Burch
- Southwest Research InstituteSan AntonioTXUSA
| | | | - B. L. Giles
- NASA Goddard Space Flight CenterGreenbeltMDUSA
| | - H. Hasegawa
- Institute of Space and Astronautical ScienceJapan Aerospace Exploration AgencySagamiharaJapan
| | - H. S. Fu
- School of Science and EnvironmentBeihang UniversityBeijingChina
| | - Y. Liu
- School of Science and EnvironmentBeihang UniversityBeijingChina
| | - Z. Wang
- School of Science and EnvironmentBeihang UniversityBeijingChina
| | | | - X. Ma
- Physical Sciences DepartmentEmbry‐Riddle Aeronautical UniversityDaytona BeachFLUSA
| | - R. C. Fear
- School of Physics and AstronomyUniversity of SouthamptonSouthamptonUK
| | | | | | - Q. Q. Shi
- School of Earth and Space SciencesPeking UniversityPekingChina
| | - C. P. Escoubet
- European Space Research and Technology CentreNoordwijkthe Netherlands
| | | | | | | | - R. E. Ergun
- Laboratory for Atmospheric and Space PhysicsUniversity of Colorado at BoulderBoulderCOUSA
| | - R. B. Torbert
- Space Science CenterUniversity of New HampshireDurhamNHUSA
| | | | - L. Avanov
- NASA Goddard Space Flight CenterGreenbeltMDUSA
- The Goddard Planetary Heliophysics InstituteUniversity of Maryland, Baltimore CountyBaltimoreMDUSA
| | - C. T. Russell
- Institute of Geophysics and Planetary PhysicsUniversity of California, Los AngelesLos AngelesCAUSA
| | - R. J. Strangeway
- Institute of Geophysics and Planetary PhysicsUniversity of California, Los AngelesLos AngelesCAUSA
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Hasegawa H, Kaneko T, Kanno C, Endo M, Yamazaki M, Kitabatake T, Monma T, Takeishi E, Sato E, Kano M. Preoperative intra-arterial chemotherapy with docetaxel, cisplatin, and peplomycin combined with intravenous chemotherapy using 5-fluorouracil for oral squamous cell carcinoma. Int J Oral Maxillofac Surg 2020; 49:984-992. [PMID: 32070653 DOI: 10.1016/j.ijom.2020.01.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 11/30/2019] [Accepted: 01/20/2020] [Indexed: 11/29/2022]
Abstract
The objectives of this study were to evaluate survival in 141 patients with stage II-IV oral squamous cell carcinoma (OSCC) treated with preoperative intra-arterial chemotherapy with docetaxel, cisplatin, and peplomycin combined with intravenous chemotherapy using 5-fluorouracil (IADCPIVF) via the superficial temporal artery, and to clarify the prognostic factors. The study population included 59 patients with stage II OSCC, 34 with stage III, and 48 with stage IV. After IADCPIVF, 139 patients underwent surgery; minimally invasive surgeries (MIS) including excisional biopsy were performed on 96 patients with a remarkably good response to IADCPIVF. The primary tumour response rate was 99.3% (complete response rate 56.7%, good partial response rate 17.0%, fair partial response rate 25.5%). Additionally, there were no serious adverse events associated with IADCPIVF. The 5-year overall survival rate was 74.6% (stage II 83.6%, stage III 72.7%, stage IV 64.8%). In the multivariate analysis of survival, T classification and clinical tumour response were significant prognostic factors. Eight (8.3%) of the patients who received MIS had primary recurrence and six were salvaged. In conclusion, IADCPIVF is safe and efficacious for treating OSCC, and MIS could reduce the extent of primary tumour resection in the case of a remarkably good response.
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Affiliation(s)
- H Hasegawa
- Department of Dentistry and Oral Surgery, Fukushima Medical University, School of Medicine, Fukushima, Japan.
| | - T Kaneko
- Department of Dentistry and Oral Surgery, Fukushima Medical University, School of Medicine, Fukushima, Japan
| | - C Kanno
- Department of Dentistry and Oral Surgery, Fukushima Medical University, School of Medicine, Fukushima, Japan
| | - M Endo
- Department of Dentistry and Oral Surgery, Fukushima Medical University, School of Medicine, Fukushima, Japan
| | - M Yamazaki
- Department of Dentistry and Oral Surgery, Fukushima Medical University, School of Medicine, Fukushima, Japan
| | - T Kitabatake
- Department of Dentistry and Oral Surgery, Fukushima Medical University, School of Medicine, Fukushima, Japan
| | - T Monma
- Department of Dentistry and Oral Surgery, Fukushima Medical University, School of Medicine, Fukushima, Japan
| | - E Takeishi
- Department of Dentistry and Oral Surgery, Tsuruoka Municipal Shonai Hospital, Tsuruoka, Japan
| | - E Sato
- Department of Dentistry, Kashima Hospital, Ibaraki, Japan
| | - M Kano
- Department of Head and Neck, Facial Surgery, Ohara General Hospital, Fukushima, Japan
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Mase A, Kogi Y, Maruyama T, Tokuzawa T, Sakai F, Kunugita M, Koike T, Hasegawa H. Non-contact and real-time measurement of heart rate and heart rate variability using microwave reflectometry. Rev Sci Instrum 2020; 91:014704. [PMID: 32012645 DOI: 10.1063/1.5128959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 12/29/2019] [Indexed: 06/10/2023]
Abstract
In this paper, we present noncontact and noninvasive vital signal detection using a microwave reflectometer. Elimination of noise components due to random movement of human subjects has been the biggest issue for microwave measurement. Appropriate filtering, amplitude control of the reflectometer signal, and cross correlation among multiple reflectometers together with new algorithms have enabled motion artifact elimination, signal peak detection, and data processing for various parameters related to heart rate (HR) and heart rate variability (HRV). We focus here on the real time measurements of instantaneous HR and HRV for practical use. The evaluation by microwave reflectometry is completely noninvasive and feasible even through clothing, which is extremely effective for health maintenance in daily life as well as for preventing sudden death related to, for example, coronary heart disease and ventricular arrhythmia.
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Affiliation(s)
- A Mase
- Global Innovation Center, Kyushu University, Kasuga 816-8580, Japan
| | - Y Kogi
- Department of Information Electronics, Fukuoka Institute of Technology, Fukuoka 811-0295, Japan
| | - T Maruyama
- Faculty of Art and Science, Kyushu University, Fukuoka 819-0395, Japan
| | - T Tokuzawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - F Sakai
- Sakura Tech Co., Yokohama 222-0033, Japan
| | - M Kunugita
- Tokai Rika, Co. Ltd., Oguchi 480-0195, Japan
| | - T Koike
- Tokai Rika, Co. Ltd., Oguchi 480-0195, Japan
| | - H Hasegawa
- Tokai Rika, Co. Ltd., Oguchi 480-0195, Japan
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41
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Kang J, Tsai CC, Hasegawa H, Morris-Paterson T, Higgins S, Crum W, Gnoni V, Green D, Gunasinghe C, Nesbitt A, Williams S, Milosevic M, Ashkan K, Goadsby P, Leschziner G, Harridge S, Rosenzweig I. The effect of hyper-buoyancy floatation (HBF), a model of simulated microgravity, on sleep and cognitive function in humans. Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.1091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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42
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Nakamura Y, Okamoto W, Kato T, Hasegawa H, Kato K, Iwasa S, Esaki T, Komatsu Y, Masuishi T, Nishina T, Nomura S, Fukui M, Matsuda S, Sato A, Fujii S, Odegaard J, Olsen S, Yoshino T. TRIUMPH: Primary efficacy of a phase II trial of trastuzumab (T) and pertuzumab (P) in patients (pts) with metastatic colorectal cancer (mCRC) with HER2 (ERBB2) amplification (amp) in tumour tissue or circulating tumour DNA (ctDNA): A GOZILA sub-study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz246.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Akata N, Hasegawa H, Sugihara S, Tanaka M, Furukawa M, Kurita N, Kovács T, Shiroma Y, Kakiuchi H. TRITIUM, HYDROGEN AND OXYGEN ISOTOPE COMPOSITIONS IN MONTHLY PRECIPITATION SAMPLES COLLECTED AT TOKI, JAPAN. Radiat Prot Dosimetry 2019; 184:338-341. [PMID: 31329995 DOI: 10.1093/rpd/ncz062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Indexed: 06/10/2023]
Abstract
Monthly precipitation samples have been collected at Toki, Japan, from November 2013 to March 2017. In this report, selected data were analysed to identify the regional hydrogen and oxygen isotope compositions. Tritium (3H) concentration in the precipitation ranged from 0.10 to 0.61 Bq L-1 and higher 3H concentrations were observed in spring rather than in other seasons. This range was similar to values reported in Chiba City, Japan. 3H concentration and the ratio d-excess, and δD values were roughly clustered according to each separate season. These regional hydrogen and oxygen isotope compositions will be used for environmental assessments of effects of the deuterium plasma experiments of the large fusion test device.
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Affiliation(s)
- N Akata
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu, Japan
| | - H Hasegawa
- Institute for Environmental Sciences, 1-7 Ienomae, Obuchi, Rokkasho, Aomori, Japan
| | - S Sugihara
- Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Japan
| | - M Tanaka
- National Institute for Fusion Science, 322-6 Oroshi, Toki, Gifu, Japan
| | - M Furukawa
- University of Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa, Japan
| | - N Kurita
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, Japan
| | - T Kovács
- University of Pannonia, 10 Egyetem Str, Veszprém, Hungary
| | - Y Shiroma
- Hirosaki University, 66-1 Honcho, Hirosaki, Aomori, Japan
| | - H Kakiuchi
- Institute for Environmental Sciences, 1-7 Ienomae, Obuchi, Rokkasho, Aomori, Japan
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44
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Hasegawa H, Taniguchi H, Kato T, Fujii S, Ebi H, Shiozawa M, Yuki S, Masuishi T, Kato K, Izawa N, Moriwaki T, Kagawa Y, Sakamoto Y, Okamoto W, Nakamura Y, Yamazaki K, Yoshino T. Prognostic and predictive impact on FMS-like tyrosine kinase 3 (FLT3) amplification in patients with metastatic colorectal cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz246.113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Hwang K, Choi E, Dokgo K, Burch JL, Sibeck DG, Giles BL, Goldstein ML, Paterson WR, Pollock CJ, Shi QQ, Fu H, Hasegawa H, Gershman DJ, Khotyaintsev Y, Torbert RB, Ergun RE, Dorelli JC, Avanov L, Russell CT, Strangeway RJ. Electron Vorticity Indicative of the Electron Diffusion Region of Magnetic Reconnection. Geophys Res Lett 2019; 46:6287-6296. [PMID: 31598018 PMCID: PMC6774273 DOI: 10.1029/2019gl082710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/08/2019] [Accepted: 05/28/2019] [Indexed: 06/10/2023]
Abstract
While vorticity defined as the curl of the velocity has been broadly used in fluid and plasma physics, this quantity has been underutilized in space physics due to low time resolution observations. We report Magnetospheric Multiscale (MMS) observations of enhanced electron vorticity in the vicinity of the electron diffusion region of magnetic reconnection. On 11 July 2017 MMS traversed the magnetotail current sheet, observing tailward-to-earthward outflow reversal, current-carrying electron jets in the direction along the electron meandering motion or out-of-plane direction, agyrotropic electron distribution functions, and dissipative signatures. At the edge of the electron jets, the electron vorticity increased with magnitudes greater than the electron gyrofrequency. The out-of-plane velocity shear along distance from the current sheet leads to the enhanced vorticity. This, in turn, contributes to the magnetic field perturbations observed by MMS. These observations indicate that electron vorticity can act as a proxy for delineating the electron diffusion region of magnetic reconnection.
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Affiliation(s)
- K.‐J. Hwang
- Southwest Research InstituteSan AntonioTXUSA
| | - E. Choi
- Southwest Research InstituteSan AntonioTXUSA
| | - K. Dokgo
- Southwest Research InstituteSan AntonioTXUSA
| | - J. L. Burch
- Southwest Research InstituteSan AntonioTXUSA
| | | | - B. L. Giles
- NASA Goddard Space Flight CenterGreenbeltMDUSA
| | - M. L. Goldstein
- The Goddard Planetary Heliophysics InstituteUniversity of MarylandBaltimoreMDUSA
| | | | | | - Q. Q. Shi
- School of Earth and Space SciencesPeking UniversityPekingChina
| | - H. Fu
- School of Science and EnvironmentBeihang UniversityBeijingChina
| | - H. Hasegawa
- Institute of Space and Astronautical ScienceJapan Aerospace Exploration AgencySagamiharaJapan
| | | | | | - R. B. Torbert
- Space Science CenterUniversity of New HampshireDurhamNHUSA
| | - R. E. Ergun
- Laboratory for Atmospheric and Space PhysicsUniversity of Colorado BoulderBoulderCOUSA
| | | | - L. Avanov
- NASA Goddard Space Flight CenterGreenbeltMDUSA
- The Goddard Planetary Heliophysics InstituteUniversity of MarylandBaltimoreMDUSA
| | - C. T. Russell
- Institute of Geophysics and Planetary PhysicsUniversity of CaliforniaLos AngelesCAUSA
| | - R. J. Strangeway
- Institute of Geophysics and Planetary PhysicsUniversity of CaliforniaLos AngelesCAUSA
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Ellenbogen JR, Narbad V, Hasegawa H, Selway R. P32 Targeting accuracy of the neuromate robot in DBS implantation for paediatric dystonia. J Neurol Psychiatry 2019. [DOI: 10.1136/jnnp-2019-abn.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
ObjectivesTo quantify the accuracy of DBS electrode implantation for movement disorder in paediatric patients utilising the neuroinspire™ software and neuromate® robot.DesignRetrospective, single-centre, cohort study.SubjectsFifteen patients with dystonia (67% female; median age 11 years, range 8–18 years) underwent intervention since May 2017.MethodsDBS procedures were planned on the neuroinspire™ software and electrodes were implanted using the Renishaw neuromate® robot and Renishaw guide tubes and secured with a dog-bone plate under general anaesthetic. Post-operative CT imaging with the intra-operative O-arm was fused to pre-operative imaging. Planned entry and target coordinates were compared to actual entry and final target coordinates in order to obtain absolute and directional errors in x (medial-lateral), y (anterior-posterior) and z (dorsal-ventral) planes. Euclidean error was calculated for each electrode. Wilcoxon signed-rank test was used to analyse error.ResultsBilateral GPi were targeted and Medtronic DBS systems were implanted for each patient (n=30). Overall median Euclidean error for electrode implantation was 2.13 mm (range, 0.71–4.85; p<0.001). No discrepancy between left- and right-sided electrodes was seen (p=0.346). Absolute errors in x (med 1.25 mm, range 0.10–4.10), y (med 0.80 mm, range 0–2.70) and z (med 1.45 mm, range 0–3.90) planes were individually significant (p<0.001). On overall anterior displacement of leads was observed (med 0.55+0.85 mm, p=0.001) but there was no significant directional bias in x (p=0.219) or z (p=0.077) planes.ConclusionsWe observed an improvement in the discrepancy seen between planned and actual lead location compared to a previously reported series using the Leksell frame in a similar cohort. Addressing possible compounding factors such as drilling techniques and electrode fixation should increase accuracy further. The neuromate® Robot is a reliable and accurate alternative to the Leksell frame.
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Oviedova A, Ellenbogen J, Hasegawa H, Kaminska M, Perides S, Lumsden D, Lin J, Ashkan K, Selway R. FM2-7 Paediatric robot-assisted DBS surgery: electrode problems and revision techniques. J Neurol Neurosurg Psychiatry 2019. [DOI: 10.1136/jnnp-2019-abn.79] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
ObjectivesWe review our cases of hardware problems requiring revision surgery and consider the technical aspects of revising the electrodes, including a frameless technique using the Renishaw Guide tubes.DesignRetrospective Review.SubjectsChildren (≤18 years old) who presented with hardware problems following implantation of a DBS for dystonia at King’s College Hospital between May 2005 and April 2018.MethodsInformation was obtained from a prospectively kept database.ResultsOf 166 paediatric patients with DBS, 25 patients had hardware problems, and of these 21 (13%) patients had specifically electrode problems requiring replacement/revision of one or more electrodes. 7 patients had high impedances requiring revision, without obvious lead migration of fracture. 7 patients had lead migration and a further 7 patients had a lead fracture with or without lead migration. 15 patients had original DBS insertion with the Leksell Stereotactic System utilising the Medtronic Stimlock for lead fixation. 6 patients had DBS inserted with the Renishaw Sterotactic Robot and utilised the Renishaw Guide Tubes, in these patients who required lead replacement it was possible to revise the electrode without using stereotactic apparatus. As the guide tubes are implanted in the correct trajectory it is possible to measure the distance required to advance/implant the lead within this to target without the need for full stereotactic reimplantation.ConclusionsElectrode dysfunction is relatively common in children with DBS and a systematic approach is required to identify the cause. When an electrode requires repositioning or replacement, the procedure can be performed in the conventional manner with a stereotactic frame, or freehand without a frame if a Renishaw Guide tube is used at time of first insertion.
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Masuda N, Yamashita T, Saji S, Araki K, Ito Y, Takano T, Takahashi M, Tsurutani J, Koizumi K, Kitada M, Kojima Y, Sagara Y, Tada H, Iwasa T, Kadoya T, Iwatani T, Hasegawa H, Morita S, Ohno S. Abstract OT2-07-05: A phase III trial to compare eribulin mesylate + trastuzumab (H) + pertuzumab (P) with paclitaxel or docetaxel + HP for HER2-positive advanced or metastatic breast cancer (JBCRG-M06/ EMERALD). Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-ot2-07-05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Docetaxel + Trastuzumab (H) + Pertuzumab (P) provided progression-free survival (PFS) and overall survival (OS) benefits in HER2-positive advanced or metastatic breast cancer (AMBC) in the CLEOPATRA study as a first-line therapy. However, long-term administration of docetaxel at a dose of 75 mg/m2 every 3 weeks in AMBC patients (pts) is difficult due to the toxicities. Eribulin mesylate (E) is a well-tolerated microtubule inhibitor, and we have reported the efficacy and safety of EHP regimen as first- and second-line therapy for AMBC in a multicenter, phase II study (JBCRG-M03/UMIN000012232). In this M06 study, we address the clinical question as to which is the better chemotherapy partner for HP as first line regimen, in terms of efficacy, toxicity and QOL.
Methods: JBCRG-M06 is a multicenter open-label randomized phase III study for HER2-positive AMBC pts who have received no prior chemotherapy except for the HER2- Antibody-Drug Conjugate (ADC). Pts will be randomized 1:1 to E (1.4mg/m2 on day 1 and 8) + H (8 mg/kg loading dose followed by 6 mg/kg) +P (840 mg loading dose followed by 420 mg) q3wks or standard taxanes (docetaxel 75mg/m2 on day1 or paclitaxel 80mg/m2 on day 1, 8 and 15) + HP q3wks. Stratification factors for randomization are; presence of visceral metastases, number of prior taxanes on perioperative adjuvant treatment, and treatment with prior anti-HER2-ADC. Primary endpoint is PFS and secondary endpoints include overall response rate, duration of response, OS, patient-reported outcomes (PRO) relating to QOL and peripheral neuropathy, new-metastases free survival, and safety. Translational research to search for biomarker for individual precision therapy will be performed. Main eligibility criteria are as follows: pts with HER2-positive AMBC, female aged 20-70 years old, ECOG PS of 0-1, LVEF ≥ 50% at baseline and adequate organ function. Pts who had progressive MBC within 6 months after the end of primary adjuvant systemic chemotherapy are excluded. The sample size was calculated by type1 error (2-sided) of 0.05 and 80% power to estimate the noninferiority margin 1.33 with an expected median PFS of 14.2 months. The target number of pts is 480 recruited over the duration of 3-years. The first patient in was achieved on August 2017. (ClinicalTrials.gov Identifier:NCT03264547).
Citation Format: Masuda N, Yamashita T, Saji S, Araki K, Ito Y, Takano T, Takahashi M, Tsurutani J, Koizumi K, Kitada M, Kojima Y, Sagara Y, Tada H, Iwasa T, Kadoya T, Iwatani T, Hasegawa H, Morita S, Ohno S. A phase III trial to compare eribulin mesylate + trastuzumab (H) + pertuzumab (P) with paclitaxel or docetaxel + HP for HER2-positive advanced or metastatic breast cancer (JBCRG-M06/ EMERALD) [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr OT2-07-05.
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Affiliation(s)
- N Masuda
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - T Yamashita
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - S Saji
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - K Araki
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - Y Ito
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - T Takano
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - M Takahashi
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - J Tsurutani
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - K Koizumi
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - M Kitada
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - Y Kojima
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - Y Sagara
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - H Tada
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - T Iwasa
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - T Kadoya
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - T Iwatani
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - H Hasegawa
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - S Morita
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
| | - S Ohno
- NHO Osaka National Hospital, Osaka, Japan; Kanagawa Cancer Center, Yokohama, Japan; Fukushima Medical University Hospital, Fukushima, Japan; Hyogo College of Medicine, Nishinomiya, Japan; The Cancer Institute Hospital of JFCR, Tokyo, Japan; Toranomon Hospital, Tokyo, Japan; NHO Hokkaido Cancer Center, Sapporo, Japan; Kindai University Hospital, Osaka-Sayama, Japan; Seirei Hamamatsu General Hospital, Hamamatsu, Japan; Asahikawa Medical University Hospital, Asahikawa, Japan; St. Marianna University School of Medicine Hospital, Kawasaki, Japan; Sagara Hospital, Kagoshima, Japan; Tohoku University Hospital, Sendai, Japan; Hiroshima University Hospital, Hiroshima, Japan; Eisai Co., Ltd., Tokyo, Japan; Graduate School of Medicine Kyoto University, Kyoto, Japan
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Yoshida H, Hasegawa H, Katsuta N, Maruyama I, Sirono S, Minami M, Asahara Y, Nishimoto S, Yamaguchi Y, Ichinnorov N, Metcalfe R. Fe-oxide concretions formed by interacting carbonate and acidic waters on Earth and Mars. Sci Adv 2018; 4:eaau0872. [PMID: 30525103 PMCID: PMC6281427 DOI: 10.1126/sciadv.aau0872] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 10/31/2018] [Indexed: 06/09/2023]
Abstract
Spherical Fe-oxide concretions on Earth, especially in Utah, USA, have been investigated as an analog of hematite spherules found in Meridiani Planum on Mars to support interpretations of water-rock interactions in early Mars. Although several formation mechanisms have been proposed for the Fe-oxide concretions on Earth, it is still unclear whether these mechanisms are viable because a precise formation process and precursor of the concretions are missing. This paper presents evidence that Fe-oxide concretions in Utah and newly found Fe-oxide concretions in Mongolia had spherical calcite concretions as precursors. Different formation stages of calcite and Fe-oxide concretions observed, both in Utah and Mongolia, indicate that calcite concretions initially formed within eolian sandstone strata and were dissolved by infiltrating Fe-rich acidic waters to form spherical FeO(OH) crusts due to pH buffering. The similarity between these Fe-oxide concretions on Earth and the hematite spherule occurrences in Meridiani Planum, combined with evidence of acid sulfate water influences on Mars, suggest that the hematite spherules also formed from dissolution of preexisting carbonate spherules possibly formed under a dense carbon dioxide early martian atmosphere.
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Affiliation(s)
- H. Yoshida
- Material Research Section, Nagoya University, University Museum, Nagoya, Japan
| | - H. Hasegawa
- Material Research Section, Nagoya University, University Museum, Nagoya, Japan
- Faculty of Science and Technology, Kochi University, Kochi, Japan
| | - N. Katsuta
- Faculty of Education, Gifu University, Gifu, Japan
| | - I. Maruyama
- Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan
| | - S. Sirono
- Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan
| | - M. Minami
- Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan
| | - Y. Asahara
- Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan
| | | | - Y. Yamaguchi
- Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan
| | - N. Ichinnorov
- Institute of Paleontology and Geology, Mongolian Academy of Science, Mongolia
| | - R. Metcalfe
- Quintessa Limited, The Hub, Henley-on-Thames, Oxfordshire, UK
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Kitamura N, Kitahara M, Shoji M, Miyoshi Y, Hasegawa H, Nakamura S, Katoh Y, Saito Y, Yokota S, Gershman DJ, Vinas AF, Giles BL, Moore TE, Paterson WR, Pollock CJ, Russell CT, Strangeway RJ, Fuselier SA, Burch JL. Direct measurements of two-way wave-particle energy transfer in a collisionless space plasma. Science 2018; 361:1000-1003. [PMID: 30190400 DOI: 10.1126/science.aap8730] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 07/04/2018] [Indexed: 11/02/2022]
Abstract
Particle acceleration by plasma waves and spontaneous wave generation are fundamental energy and momentum exchange processes in collisionless plasmas. Such wave-particle interactions occur ubiquitously in space. We present ultrafast measurements in Earth's magnetosphere by the Magnetospheric Multiscale spacecraft that enabled quantitative evaluation of energy transfer in interactions associated with electromagnetic ion cyclotron waves. The observed ion distributions are not symmetric around the magnetic field direction but are in phase with the plasma wave fields. The wave-ion phase relations demonstrate that a cyclotron resonance transferred energy from hot protons to waves, which in turn nonresonantly accelerated cold He+ to energies up to ~2 kilo-electron volts. These observations provide direct quantitative evidence for collisionless energy transfer in plasmas between distinct particle populations via wave-particle interactions.
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Affiliation(s)
- N Kitamura
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan. .,Department of Earth and Planetary Science, Graduate School of Science, the University of Tokyo, Tokyo, Japan
| | - M Kitahara
- Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Japan
| | - M Shoji
- Institute for Space-Earth Environmental Research (ISEE), Nagoya University, Nagoya, Japan
| | - Y Miyoshi
- Institute for Space-Earth Environmental Research (ISEE), Nagoya University, Nagoya, Japan
| | - H Hasegawa
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - S Nakamura
- Research Institute for Sustainable Humanosphere (RISH), Kyoto University, Uji, Japan
| | - Y Katoh
- Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Japan
| | - Y Saito
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
| | - S Yokota
- Department of Earth and Space Science, Graduate School of Science, Osaka University, Toyonaka, Japan
| | - D J Gershman
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - A F Vinas
- NASA Goddard Space Flight Center, Greenbelt, MD, USA.,Department of Physics, American University, Washington, DC, USA
| | - B L Giles
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - T E Moore
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | - W R Paterson
- NASA Goddard Space Flight Center, Greenbelt, MD, USA
| | | | - C T Russell
- Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA, USA
| | - R J Strangeway
- Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA, USA
| | - S A Fuselier
- Southwest Research Institute, San Antonio, TX, USA.,University of Texas at San Antonio, San Antonio, TX, USA
| | - J L Burch
- Southwest Research Institute, San Antonio, TX, USA
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