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Fujimura N, Ichihashi S, Shibata T, Matsumura H, Watanabe M, Morikage N, Kurimoto Y, Banno H, Uchiyama H, Obara H. Early Clinical Results From the Japanese Prospective Multicenter Study to Evaluate Zenith Alpha Abdominal Stent Graft for Abdominal Aortic Aneurysm (JUSTICE) Registry Demonstrate Acceptable Limb Patency at 12 Months. J Endovasc Ther 2024:15266028241248311. [PMID: 38654524 DOI: 10.1177/15266028241248311] [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] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
PURPOSE Recent reports of the Zenith Alpha abdominal endovascular graft (Zenith Alpha AAA, Cook, Inc., Bloomington, Indiana) have demonstrated an unexpectedly high incidence of limb graft occlusion (LGO). The purpose of this study was to prospectively evaluate the performance of the Zenith AAA in Japan, with a specific focus on LGO. MATERIALS AND METHODS All endovascular aneurysm repairs (EVARs) for abdominal aortic aneurysms performed using the Zenith Alpha AAA from July 2020 to October 2021 in 23 Japanese hospitals were prospectively evaluated. All computed tomographic images were analyzed in the core laboratory. Late complications were defined as any aneurysm-related events occurring >30 days after EVAR, including aneurysm sac enlargement of >5 mm and any reinterventions performed. Endoleaks without sac enlargement or reintervention were excluded as late complications. RESULTS During the study period, 147 EVARs were performed using the Zenith Alpha AAA. The mean patient age was 76.5±7.7 years, 84.4% of patients were male, and the mean aneurysm diameter was 52.4±9.2 mm. Instruction-for-use violations were observed in 76 patients (51.7%), primarily associated with a severely angulated proximal neck (>60°). There were six intraoperative complications and 62 additional intraoperative treatments reported, most of which involved preemptive coil embolization of the inferior mesenteric artery (37 cases). Technical success, defined as the absence of type 1 or 3 endoleaks on final angiography, was achieved in 99.3% of patients. At 12 months, there was only one case of type 1/3 endoleak (0.8%) and one aneurysm sac enlargement exceeding 5 mm (0.8%); however, a high incidence of type 2 endoleaks was observed in 35.2% of patients, and aneurysm sac regression exceeding 5 mm was achieved in 30.1% of patients. Nine late complications were observed, and the rate of freedom from late complications at 12 months was 93.5%, encompassing four LGOs and one limb graft stenosis (3.4%). CONCLUSIONS In contrast to recent reports, our Japanese multicenter prospective study demonstrated satisfactory early clinical results, including an acceptable LGO rate, for the low-profile Zenith Alpha AAA. Long-term follow-ups will be performed to confirm the persistence of these outcomes. CLINICAL IMPACT This study prospectively evaluated the performance of 147 Zenith Alpha AAAs used for endovascular aneurysm repair with core-lab adjudication focusing especially on limb graft occlusion (LGO). At 12 months, aneurysm sac regression exceeding 5 mm was achieved in 30.1% of patients, and there was only one type 1/3 endoleak, one aneurysm sac enlargement (>5 mm), and nine late complications including five LGOs (3.4%), resulting in rate of freedom from late complications at 93.5%. Satisfactory early clinical results, including an acceptable rate of LGO can be achieved, particularly with cautious usage of the Zenith Alpha Spiral-Z Endovascular Leg." 5mm), and nine late complications including five LGOs (3.4%), resulting in rate of freedom from late complications at 93.5%. Satisfactory early clinical results, including an acceptable rate of LGO can be achieved, particularly with cautious usage of the Zenith Alpha Spiral-Z Endovascular Leg.
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Affiliation(s)
- Naoki Fujimura
- Department of Vascular Surgery, Tokyo Saiseikai Central Hospital, Tokyo, Japan
| | | | - Tsuyoshi Shibata
- Department of Cardiovascular Surgery, Sapporo Medical University, Hokkaido, Japan
| | - Hitoshi Matsumura
- Department of Cardiovascular Surgery, School of Medicine, Fukuoka University, Fukuoka, Japan
| | - Michiko Watanabe
- Department of Cardiovascular Surgery, Chiba University, Chiba, Japan
| | - Noriyasu Morikage
- Department of Vascular Surgery, Yamaguchi University, Yamaguchi, Japan
| | - Yoshihiko Kurimoto
- Department of Cardiovascular Surgery, Teine Keijinkai Hospital, Hokkaido, Japan
| | - Hiroshi Banno
- Division of Vascular and Endovascular Surgery, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hidetoshi Uchiyama
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Ibaraki, Japan
| | - Hideaki Obara
- Department of Surgery, Keio University School of Medicine, Tokyo, Japan
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Fujimura N, Obara H, Matsubara K, Toya N, Isogai N, Ogino H, Fujii T, Kudo T, Kanaoka Y, Harada H, Uchiyama H, Guntani A, Shimogawara T, Watada S, Shibutani S, Ohki T. Long-Term Outcomes of a Japanese Prospective Multicenter Registry Using a Heparin-Bonded Expanded Polytetrafluoroethylene Graft for Above-the-Knee Femoropopliteal Bypasses. Circ J 2024:CJ-24-0135. [PMID: 38616124 DOI: 10.1253/circj.cj-24-0135] [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] [Indexed: 04/16/2024]
Abstract
BACKGROUND Despite the widespread use of PROPATEN®, a bioactive heparin-bonded expanded polytetrafluoroethylene graft, in bypass surgery, there are only a few reports of long-term results. We evaluated the long-term results of PROPATEN®use for above-knee femoropopliteal bypass (AKFPB).Methods and Results: After PROPATEN®-based AKFPB, patients were prospectively registered at 20 Japanese institutions between July 2014 and October 2017 to evaluate long-term results. During the median follow-up of 76 months (interquartile range 36-88 months) for 120 limbs (in 113 patients; mean [±SD] age 72.7±8.1 years; 66.7% male; ankle-brachial index [ABI] 0.45±0.27; lesion length 26.2±5.7 cm; chronic limb-threatening ischemia in 45 limbs), there were 8 major amputations; however, clinical improvement was sustained (mean [±SD] ABI 0.87±0.23) and the Rutherford classification grade improved in 105 (87.5%) limbs at the latest follow-up. At 8 years, the primary patency, freedom from target-lesion revascularization, secondary patency, survival, and amputation-free survival, as estimated by the Kaplan-Meier method, were 66.3±4.8%, 71.5±4.4%, 86.5±3.4%, 53.1±5.0%, and 47.4±5.3%, respectively. CONCLUSIONS This multicenter prospective registry-based analysis showed sustained excellent clinical improvement and secondary patency for up to 8 years following PROPATEN®-based AKFPB. PROPATEN®constitutes a durable and good revascularization option for complex superficial femoral artery lesions, especially when endovascular treatment is inappropriate or an adequate venous conduit is unavailable.
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Affiliation(s)
- Naoki Fujimura
- Department of Vascular Surgery, Saiseikai Central Hospital
| | - Hideaki Obara
- Department of Surgery, Keio University School of Medicine
| | | | - Naoki Toya
- Department of Surgery, The Jikei University Kashiwa Hospital
| | - Naoko Isogai
- Department of Surgery, Shonan Kamakura General Hospital
| | | | - Taku Fujii
- Department of Surgery, Saitama Municipal Hospital
| | - Toshifumi Kudo
- Department of Surgery, Tokyo Medical and Dental University
| | - Yuji Kanaoka
- Department of Cardiovascular Surgery, Kawasaki Medical School
| | | | | | - Atsushi Guntani
- Department of Vascular Surgery, Saiseikai Yahata General Hospital
| | | | | | | | - Takao Ohki
- Division of Vascular Surgery, Department of Surgery, The Jikei University School of Medicine
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Yamamoto Y, Uchiyama H, Oonuki M. Extravascular Migration of a Stentgraft Into the Bladder: A Rare Complication After Endovascular Treatment of an Arterio-Ureteral Fistula. Vasc Endovascular Surg 2024; 58:90-94. [PMID: 37320969 DOI: 10.1177/15385744231183783] [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] [Indexed: 06/17/2023]
Abstract
Endovascular repair has gained acceptance for the treatment of arterio-ureteral fistula (AUF). However, data on associated postoperative complications are relatively scarce. We report the case of a 59-year-old woman with an external iliac artery (EIA)-ureteral fistula treated by endovascular stentgraft placement. Hematuria resolved after the procedure; however, occlusion of the left EIA and migration of the stentgraft into the bladder occurred 3 months postoperatively. Endovascular repair is a safe and effective method for the treatment of AUF, but it needs to be carefully followed. Extravascular migration of a stentgraft is a rare but possible complication.
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Affiliation(s)
- Yohei Yamamoto
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Ibaraki, Japan
| | - Hidetoshi Uchiyama
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Ibaraki, Japan
| | - Masahiro Oonuki
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Ibaraki, Japan
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Yamamoto Y, Uchiyama H, Oonuki M. Use of Recombinant Human Soluble Thrombomodulin in a Patient with Disseminated Intravascular Coagulation Associated with Abdominal Aortic Aneurysm: A Case Report. Ann Vasc Dis 2023; 16:210-213. [PMID: 37779649 PMCID: PMC10539116 DOI: 10.3400/avd.cr.23-00009] [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] [Received: 02/01/2023] [Accepted: 05/14/2023] [Indexed: 10/03/2023] Open
Abstract
We herein present a case involving an 86-year-old man with abdominal aortic aneurysm complicated by symptomatic disseminated intravascular coagulation (DIC). The patient received preoperative treatment for DIC using recombinant human soluble thrombomodulin (rTM) followed by open surgical repair of the aneurysm. The patient's coagulopathy cleared quickly after the start of rTM, and the intraoperative and postoperative course went smoothly. The patient was followed without anticoagulant medication, and there was no recurrence of DIC during 14 months of follow-up. The preoperative administration of rTM can be a useful choice to assist safe treatment of aortic aneurysm complicated by aneurysm-related DIC.
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Affiliation(s)
- Yohei Yamamoto
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Hidetoshi Uchiyama
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Masahiro Oonuki
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
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Yamamoto Y, Uchiyama H. How to Treat a Distal Splenic Artery Aneurysm: Open Aneurysmorrhaphy as the Treatment of Choice. Eur J Vasc Endovasc Surg 2023; 66:260. [PMID: 37327968 DOI: 10.1016/j.ejvs.2023.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/17/2023] [Accepted: 06/06/2023] [Indexed: 06/18/2023]
Affiliation(s)
- Yohei Yamamoto
- Division of Vascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan; Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura-shi, Ibaraki, Japan.
| | - Hidetoshi Uchiyama
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura-shi, Ibaraki, Japan
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Yamamoto Y, Uchiyama H, Oonuki M. Outcomes of Femoral Endarterectomy with Superficial Tributary Vein Patch Angioplasty. Ann Vasc Surg 2023; 90:197-203. [PMID: 36473670 DOI: 10.1016/j.avsg.2022.10.026] [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] [Received: 07/31/2022] [Revised: 10/18/2022] [Accepted: 10/26/2022] [Indexed: 12/12/2022]
Abstract
BACKGROUND Surgical endarterectomy is still considered the gold standard for the treatment of common femoral artery (CFA) occlusive disease. The present study evaluated the outcomes of CFA endarterectomy with patch angioplasty using the superficial tributary vein (STV) of the great saphenous vein. METHODS This was a single-center, retrospective study. We reviewed our institutional data of consecutive patients who received elective CFA endarterectomy between January 2014 and December 2021. RESULTS During the study period, CFA endarterectomy with STV patch angioplasty was performed in 49 limbs in 42 patients, including 33 limbs (67.3%) treated by hybrid procedure combining CFA endarterectomy with endovascular treatment. Technical success was achieved in 100% of subjects. The median ankle brachial pressure index improved from 0.57 (0.43-0.67) preoperatively to 0.96 (0.77-0.99) postoperatively (P < 0.001). The 30-day mortality rate was 2.0% (n = 1). The overall 30-day complication rate was 6.1% (n = 3) and the local complication rate was 2.0% (n = 1). No aneurysmal dilatation or rupture of an STV patch was observed at a median follow-up of 22 months. The 1-year and 2-year primary patency rates were 97.4% and 97.4%, respectively. CONCLUSIONS The efficacy and patency of CFA endarterectomy with STV patch angioplasty were similar to those of conventional CFA endarterectomy. STV patch angioplasty is a durable procedure and may improve the outcomes of CFA endarterectomy through a reduction in the risk of postoperative local complications by avoiding the use of a prosthetic patch and by preserving the main great saphenous vein.
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Affiliation(s)
- Yohei Yamamoto
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Ibaraki, Japan.
| | - Hidetoshi Uchiyama
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Ibaraki, Japan
| | - Masahiro Oonuki
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Ibaraki, Japan
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Ichihashi S, Takahara M, Yamaoka T, Hara M, Kobayashi T, Tamai H, Nagatomi S, Igari K, Endo M, Uchiyama H, Bolstad F, Iwakoshi S, Fujimura N, Ohki T, Kichikawa K. Drug Eluting Versus Covered Stent for Femoropopliteal Artery Lesions: Results of the ULTIMATE Study. J Vasc Surg 2022. [DOI: 10.1016/j.jvs.2022.10.018] [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: 11/19/2022]
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Yamamoto Y, Uchiyama H, Oonuki M. Total Arch Debranching Thoracic Endovascular Aortic Repair Using Femoral Artery Inflow. Int Heart J 2022; 63:995-998. [PMID: 36104236 DOI: 10.1536/ihj.22-153] [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] [Indexed: 11/18/2022]
Abstract
Some patients with aortic arch aneurysm are ineligible for open repair because of excessive perioperative risk, and others may not be suited for total endovascular repair due to anatomic constraints. We herein report a case of aortic arch aneurysm in a 94-year-old woman. The patient underwent hybrid aortic arch repair consisting of total arch debranching using bilateral femoral artery inflow and thoracic endovascular aortic repair. The patient was discharged without complications and is in good condition with dependent ambulation at 14 months of follow-up. Although a careful selection of cases is highly recommended, the use of the femoral artery inflow for arch debranching is considered to be a viable rescue option for high-risk patients.
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Affiliation(s)
- Yohei Yamamoto
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital
| | | | - Masahiro Oonuki
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital
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Ichihashi S, Takahara M, Yamaoka T, Hara M, Kobayashi T, Tamai H, Nagatomi S, Igari K, Endo M, Uchiyama H, Bolstad F, Iwakoshi S, Fujimura N, Ohki T, Kichikawa K. Drug eluting versus covered stent for femoropopliteal artery lesions: Results of the ULTIMATE study. Eur J Vasc Endovasc Surg 2022; 64:359-366. [DOI: 10.1016/j.ejvs.2022.05.046] [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] [Received: 06/14/2021] [Revised: 05/06/2022] [Accepted: 05/30/2022] [Indexed: 12/24/2022]
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10
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Yamamoto Y, Uchiyama H, Oonuki M. Effects of Suprarenal Aortic Cross-Clamping and Adjunctive Renal Reconstruction on Outcomes of Open Abdominal Aortic Aneurysm Repair. Ann Thorac Cardiovasc Surg 2022; 28:278-285. [PMID: 35387925 PMCID: PMC9433884 DOI: 10.5761/atcs.oa.21-00258] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
PURPOSE To analyze our contemporary experience in open abdominal aortic aneurysm (AAA) repair. We focused on the effects of suprarenal (SR) aortic cross-clamping and adjunctive renal reconstruction (RR) on postoperative outcomes. METHODS We retrospectively reviewed our institutional data of 141 consecutive patients who received elective open AAA repair between January 2014 and December 2020. RESULTS Seventy-five procedures were performed with SR aortic cross-clamping, 20 of which required an adjunctive RR. Patients in the SR group had a higher incidence of postoperative acute kidney injury (AKI) (18.7% vs. 7.6%, P = 0.045). There were no significant between-group differences in other major complications. The 30-day mortality rate in the infrarenal (IR) and SR groups was 0% and 1.3%, respectively. After a median follow-up of 33 months, the rates of chronic renal decline in the IR (18.2%) and SR (21.3%) groups were similar. All reconstructed renal arteries were patent without reintervention. The 5-year overall survival rate in the IR and SR groups was 88.8% and 83.2%, respectively. CONCLUSIONS SR aortic cross-clamping was associated with postoperative AKI but neither SR aortic cross-clamping nor RR affected the long-term renal function or mortality. Open repair remains an essential option for patients with AAA, especially those with complex anatomy.
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Affiliation(s)
- Yohei Yamamoto
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Hidetoshi Uchiyama
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Masahiro Oonuki
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
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Hirooka K, Anju K, Moriyama Y, Araki Y, Bhunchet E, Kinoshita R, Yamamoto Y, Uchiyama H, Oonuki M, Tanaka H. Calciphylaxis After Aortic Valve Replacement in a Patient with End-Stage Renal Disease. Ann Vasc Dis 2021; 14:376-379. [PMID: 35082944 PMCID: PMC8752931 DOI: 10.3400/avd.cr.21-00040] [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] [Received: 03/19/2021] [Accepted: 08/10/2021] [Indexed: 11/13/2022] Open
Abstract
In this study, we report a case of a patient on dialysis who presented necrotic lesions on the legs and penile ulceration 7 years after a mechanical aortic valve replacement. The diagnosis of calciphylaxis was not confirmed even after skin biopsy, and multidisciplinary management was not initiated until the patient was admitted with septic shock. Cardiovascular surgeons should be aware of warfarin-induced calciphylaxis, whose pathophysiology differs from that of atherosclerosis. Considering poor long-term survival of dialysis patients, mechanical valves should be reserved only for those patients whose estimated survival is longer than the time taken for a biological valve to deteriorate.
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Affiliation(s)
- Kazunobu Hirooka
- Department of Cardiac and Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Keisuke Anju
- Department of Dermatology, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Yoshihiro Moriyama
- Department of Dermatology, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Yuichi Araki
- Department of Emergency, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Ekapot Bhunchet
- Department of Pathology, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Ryoji Kinoshita
- Department of Cardiac and Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Yohei Yamamoto
- Department of Cardiac and Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Hidetoshi Uchiyama
- Department of Cardiac and Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Masahiro Oonuki
- Department of Cardiac and Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
| | - Hiroyuki Tanaka
- Department of Cardiac and Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Ibaraki, Japan
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Inui M, Kajihara Y, Hosokawa S, Chiba A, Nakajima Y, Matsuda K, Stellhorn JR, Hagiya T, Ishikawa D, Uchiyama H, Tsutsui S, Baron AQR. Low energy excitation in liquid Sb and liquid Bi observed in inelastic x-ray scattering spectra. J Phys Condens Matter 2021; 33:475101. [PMID: 34438373 DOI: 10.1088/1361-648x/ac216c] [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] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 08/26/2021] [Indexed: 06/13/2023]
Abstract
The dynamic structure factorS(Q,E), whereQandEare momentum and energy transfer, respectively, has been measured for liquid Sb, using inelastic x-ray scattering. A modified damped harmonic oscillator model function was applied to analyseS(Q,E) of liquid Sb and also to that of liquid Bi by Inuiet al(2015Phys. Rev.B92, 054206). The obtained excitation energy was in fairly good agreement with that predicted byab initiomolecular dynamics simulations on these liquid semi-metals. The excitation energy of the longitudinal acoustic mode in liquid Sb and liquid Bi exhibits flat-toppedQdependence whereas the lower excitation energy below the longitudinal acoustic excitation showsQ-gap behaviour. From the viscosity estimated from theQ-gap experimentally obtained, it is inferred that the lower energy excitation arises from the transverse acoustic excitation in the liquids.
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Affiliation(s)
- M Inui
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8521, Japan
| | - Y Kajihara
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8521, Japan
| | - S Hosokawa
- Department of Physics, Kumamoto University, Kumamoto 860-8555, Japan
| | - A Chiba
- Department of Physics, Keio University, Yokohama 223-8522, Japan
| | - Y Nakajima
- Department of Physics, Kumamoto University, Kumamoto 860-8555, Japan
| | - K Matsuda
- Department of Physics, Kumamoto University, Kumamoto 860-8555, Japan
| | - J R Stellhorn
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8521, Japan
| | - T Hagiya
- Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - D Ishikawa
- Japan Synchrotron Radiation Research Institute (JASRI), Sayo-cho, Hyogo 679-5198, Japan
| | - H Uchiyama
- Japan Synchrotron Radiation Research Institute (JASRI), Sayo-cho, Hyogo 679-5198, Japan
| | - S Tsutsui
- Japan Synchrotron Radiation Research Institute (JASRI), Sayo-cho, Hyogo 679-5198, Japan
| | - A Q R Baron
- Japan Synchrotron Radiation Research Institute (JASRI), Sayo-cho, Hyogo 679-5198, Japan
- Materials Dynamics Laboratory, RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
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13
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Fujimura N, Imazuru T, Matsumura H, Shibata T, Furuyama T, Kaneko K, Uchiyama H, Morikage N, Uchida T, Teshima E, Yamaoka T, Masuhara H, Ueda H, Arakawa M, Norimatsu T, Obara H, Onitsuka S. Two-Year Results of a Multicenter Prospective Observational Study of the Zenith Spiral-Z Limb Deployed in the External Iliac Artery During Endovascular Aneurysm Repair. Circ J 2020; 84:1764-1770. [DOI: 10.1253/circj.cj-20-0195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Naoki Fujimura
- Division of Vascular Surgery, Saiseikai Central Hospital
| | - Tomohiro Imazuru
- Department of Cardiovascular Surgery, Teikyo University Hospital
| | - Hitoshi Matsumura
- Department of Cardiovascular Surgery, Fukuoka University School of Medicine
| | - Tsuyoshi Shibata
- Department of Cardiovascular Surgery, Hakodate Municipal Hospital
| | - Tadashi Furuyama
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University
| | - Kenjiro Kaneko
- Department of Vascular Surgery, Shin-yurigaoka General Hospital
| | | | | | | | - Eiichi Teshima
- Department of Cardiovascular Surgery, Fukuoka Wajiro Hospital
| | | | - Hiroshi Masuhara
- Department of Cardiovascular Surgery, Toho University Omori Medical Center
| | - Hideki Ueda
- Department of Cardiovascular Surgery, Chiba University
| | - Mamoru Arakawa
- Department of Cardiovascular Surgery, Nerima Mitsugaoka Hospital
| | - Togo Norimatsu
- Department of Vascular Surgery, Sakakibara Memorial Hospital
| | - Hideaki Obara
- Department of Surgery, Keio University School of Medicine
| | - Seiji Onitsuka
- Department of Surgery, Kurume University School of Medicine
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Yamamoto Y, Uchiyama H, Oonuki M. Endovascular coil embolization of a large tibioperoneal trunk pseudoaneurysm. J Vasc Surg Cases Innov Tech 2020; 6:365-368. [PMID: 33367189 PMCID: PMC7748989 DOI: 10.1016/j.jvscit.2020.04.009] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 04/30/2020] [Indexed: 11/24/2022]
Abstract
Infrapopliteal artery aneurysms are rare, and tibioperoneal trunk aneurysms are even rarer. We herein report an unusual case of large tibioperoneal trunk pseudoaneurysm. The patient underwent successful endovascular exclusion of the pseudoaneurysm by coil embolization with stent assistance. The clinical features and management of tibioperoneal trunk aneurysms are also discussed in this article.
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Affiliation(s)
- Yohei Yamamoto
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Ibaraki, Japan
| | - Hidetoshi Uchiyama
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Ibaraki, Japan
| | - Masahiro Oonuki
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Ibaraki, Japan
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15
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Inui M, Kajihara Y, Tsuchiya Y, Hosokawa S, Matsuda K, Uchiyama H, Tsutsui S, Baron AQR. Peculiar temperature dependence of dynamical sound speed in liquid Se 50Te 50 by inelastic x-ray scattering. J Phys Condens Matter 2020; 32:214003. [PMID: 31958784 DOI: 10.1088/1361-648x/ab6d8e] [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] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Inelastic x-ray scattering (IXS) measurements were carried out on liquid Se50Te50 at temperatures up to 1323 K to investigate how the atomic dynamics changes with temperature through the semiconductor-metal transition. The acoustic mode was clearly observed in the dynamic structure factor and its energy was determined using a damped harmonic oscillator model. The dynamical sound speed obtained by IXS for [Formula: see text] nm-1 was found to behave similarly to the temperature dependence of ultrasonic sound velocity with a minimum near the semiconductor metal transition. The results can be explained by taking liquid Se50Te50 to be an inhomogeneous liquid consisting of metallic and semiconducting domains whose size is approximately 3 nm. The relaxation time obtained from frequency dependence of the dynamical sound speed was on a picosecond time scale.
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Affiliation(s)
- M Inui
- Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 7319-8521, Japan
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16
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Shibutani S, Obara H, Matsubara K, Toya N, Isogai N, Ogino H, Watada S, Asami A, Kudo T, Kanaoka Y, Fujimura N, Harada H, Uchiyama H, Sato Y, Ohki T. Midterm Results of a Japanese Prospective Multicenter Registry of Heparin-Bonded Expanded Polytetrafluoroethylene Grafts for Above-the-Knee Femoropopliteal Bypass. Circ J 2020; 84:501-508. [PMID: 32062636 DOI: 10.1253/circj.cj-19-0908] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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] [Indexed: 11/09/2022]
Abstract
BACKGROUND This study prospectively analyzed the midterm results of above-the-knee femoropopliteal bypass (AKb) using bioactive heparin-bonded expanded polytetrafluoroethylene (HB-ePTFE) graft in patients with femoropopliteal occlusive disease.Methods and Results:This prospective, multicenter, non-randomized study reviewed limbs undergoing AKb with HB-ePTFE graft for femoropopliteal lesion in 20 Japanese institutions between July 2014 and October 2017. Primary efficacy endpoints were primary, primary assisted, and secondary graft patency. Safety endpoints included any major adverse limb event and perioperative mortality. During the study period, 120 limbs of 113 patients (mean age, 72.7 years) underwent AKb with HB-ePTFE grafts. A total of 45 patients (37.5%) had critical limb ischemia and 17 (15.0%) were on hemodialysis (HD). Median duration of follow-up was 16 months (range, 1-36 months). Estimated 1- and 2-year primary, primary assisted, and secondary graft patency rates were 89.4% and 82.7%, 89.4% and 87.2%, and 94.7% and 92.5%, respectively. On univariate analysis of 2-year primary graft patency, having 3 run-off vessels, cuffed distal anastomoses, no coronary artery disease, and no chronic kidney disease requiring HD were significantly associated with favorable patency. CONCLUSIONS AKb using HB-ePTFE grafts achieved favorable 2-year graft patency. AKb using HB-ePTFE grafts may therefore be an acceptable, highly effective treatment option for femoropopliteal artery lesions.
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Affiliation(s)
| | - Hideaki Obara
- Department of Surgery, Keio University School of Medicine
| | | | - Naoki Toya
- Department of Surgery, The Jikei University Kashiwa Hospital
| | - Naoko Isogai
- Department of Surgery, Shonan Kamakura General Hospital
| | | | | | | | - Toshifumi Kudo
- Department of Surgery, Tokyo Medical and Dental University
| | - Yuji Kanaoka
- Department of Surgery, The Jikei University School of Medicine
| | - Naoki Fujimura
- Division of Vascular Surgery, Saiseikai Central Hospital
| | | | | | - Yasunori Sato
- Department of Preventive Medicine and Public Health, Keio University School of Medicine
| | - Takao Ohki
- Department of Surgery, The Jikei University School of Medicine
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17
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Kishino M, Nishida K, Kimura K, Takahashi M, Nakaminato S, Kume H, Uchiyama H, Kudo T, Kawada S, Mori K, Tateishi U. Paravesical space arteriovenous malformation as a specific subgroup of pelvic vascular anomaly: a case series and review of literature. Jpn J Radiol 2020; 38:434-439. [PMID: 32043235 DOI: 10.1007/s11604-020-00924-6] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 01/25/2020] [Indexed: 11/27/2022]
Abstract
Treatment of pelvic arteriovenous malformations (AVMs) is frequently challenging because of the complex structures and anatomical diversity among cases. We present a case series of six patients with pelvic AVMs. All patients had a similar anatomical structure consisting of multiple feeders from the unilateral internal iliac artery, collecting into a dilated venous sac in the unilateral paravesical space and draining into a single outflow, eventually joining the pre-prostatic vein or internal iliac vein. Five among these patients were successfully treated by catheter-directed embolo-sclerotherapy. In addition to our six cases, we identified six previous case reports of pelvic AVM with similar anatomical characteristics. Herein, we summarize the clinical and anatomical features of these 12 paravesical AVM cases. In all cases, the patients were men; the AVM was predominantly located at the right paravesical space and demonstrated good therapeutic effect of catheter-directed embolosclerotherapy. These paravesical AVMs may constitute a new subgroup of pelvic vascular anomalies with the same etiology that are treatable by adequate catheter intervention.
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Affiliation(s)
- Mitsuhiro Kishino
- Department of Diagnostic Radiology and Nuclear Medicine, Graduate School of Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan.
| | - Kenji Nishida
- Department of Diagnostic Radiology and Nuclear Medicine, Graduate School of Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Koichiro Kimura
- Department of Diagnostic Radiology and Nuclear Medicine, Graduate School of Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Marie Takahashi
- Department of Diagnostic Radiology and Nuclear Medicine, Graduate School of Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Shuichiro Nakaminato
- Department of Diagnostic Radiology and Nuclear Medicine, Graduate School of Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
| | - Hiroko Kume
- Department of Vascular Surgery, Moriya Keiyu Hospital, Moriya, Japan
| | - Hidetoshi Uchiyama
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, Japan
| | - Toshifumi Kudo
- Department of Vascular Surgery, Graduate School of Medicine, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shuichi Kawada
- Department of Diagnostic Radiology, Tsuchiura Kyodo General Hospital, Tsuchiura, Japan
| | - Kouichi Mori
- Department of Diagnostic Radiology, Tsuchiura Kyodo General Hospital, Tsuchiura, Japan
| | - Ukihide Tateishi
- Department of Diagnostic Radiology and Nuclear Medicine, Graduate School of Medicine, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-8519, Japan
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18
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Yamamoto Y, Uchiyama H, Onuki M. An Unusual Variational Anatomy of the Medial Circumflex Femoral Artery: A Case Report of a Post-catheterization Femoral Arteriovenous Fistula. Cureus 2020; 12:e6734. [PMID: 32133257 PMCID: PMC7034769 DOI: 10.7759/cureus.6734] [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: 11/28/2022] Open
Abstract
The medial circumflex femoral artery (MCFA) typically presents as a major branch of the profunda femoris artery or it can also directly originate from the common femoral artery. Many anatomical variations of the MCFA have been described due to their clinical significance. We herein report a case of an unusual anatomical variation of the MCFA crossing anterior to the femoral vein that led to iatrogenic arteriovenous fistula formation after cardiac catheterization. The identification of such rare vascular anatomical variations is of great importance when attempting femoral arterial or venous puncture in order to minimize unnecessary complications.
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Affiliation(s)
- Yohei Yamamoto
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, JPN
| | - Hidetoshi Uchiyama
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, JPN
| | - Masahiro Onuki
- Department of Vascular Surgery, Tsuchiura Kyodo General Hospital, Tsuchiura, JPN
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19
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Murayama H, Sato Y, Kurihara R, Kasahara S, Mizukami Y, Kasahara Y, Uchiyama H, Yamamoto A, Moon EG, Cai J, Freyermuth J, Greven M, Shibauchi T, Matsuda Y. Diagonal nematicity in the pseudogap phase of HgBa 2CuO 4+δ. Nat Commun 2019; 10:3282. [PMID: 31337758 PMCID: PMC6650423 DOI: 10.1038/s41467-019-11200-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [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: 05/01/2018] [Accepted: 06/27/2019] [Indexed: 11/09/2022] Open
Abstract
The pseudogap phenomenon in the cuprates is arguably the most mysterious puzzle in the field of high-temperature superconductivity. The tetragonal cuprate HgBa2CuO4+δ, with only one CuO2 layer per primitive cell, is an ideal system to tackle this puzzle. Here, we measure the magnetic susceptibility anisotropy within the CuO2 plane with exceptionally high-precision magnetic torque experiments. Our key finding is that a distinct two-fold in-plane anisotropy sets in below the pseudogap temperature T*, which provides thermodynamic evidence for a nematic phase transition with broken four-fold symmetry. Surprisingly, the nematic director orients along the diagonal direction of the CuO2 square lattice, in sharp contrast to the bond nematicity along the Cu-O-Cu direction. Another remarkable feature is that the enhancement of the diagonal nematicity with decreasing temperature is suppressed around the temperature at which short-range charge-density-wave formation occurs. Our result suggests a competing relationship between diagonal nematic and charge-density-wave order in HgBa2CuO4+δ.
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Affiliation(s)
- H Murayama
- Department of Physics, Kyoto University, Kyoto, 606-8502, Japan
| | - Y Sato
- Department of Physics, Kyoto University, Kyoto, 606-8502, Japan
| | - R Kurihara
- Department of Physics, Kyoto University, Kyoto, 606-8502, Japan
| | - S Kasahara
- Department of Physics, Kyoto University, Kyoto, 606-8502, Japan
| | - Y Mizukami
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - Y Kasahara
- Department of Physics, Kyoto University, Kyoto, 606-8502, Japan
| | - H Uchiyama
- Materials Dynamics Laboratory, RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo, 679-5148, Japan.,Research and Utilization Division, Japan Synchrotron Radiation Research Institute (SPring-8/JASRI), 1-1-1 Kouto, Sayo, Hyogo, 679-5198, Japan
| | - A Yamamoto
- Graduate School of Engineering and Science, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo, 135-8584, Japan
| | - E-G Moon
- Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea
| | - J Cai
- School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, 55455, USA.,Physics Department, University of Maryland, College Park, MD, 20742-4111, USA
| | - J Freyermuth
- School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, 55455, USA.,Department of Physics, The Ohio State University, Columbus, OH, 43210-1117, USA
| | - M Greven
- School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, 55455, USA
| | - T Shibauchi
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - Y Matsuda
- Department of Physics, Kyoto University, Kyoto, 606-8502, Japan.
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20
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Inui M, Suekuni K, Kajihara Y, Hosokawa S, Takabatake T, Nakajima Y, Matsuda K, Ohara K, Uchiyama H, Tsutsui S. Static and dynamic structures of liquid Ba 8Ga 16Sn 30: a melt of the thermoelectric clathrate compounds. J Phys Condens Matter 2018; 30:455101. [PMID: 30251705 DOI: 10.1088/1361-648x/aae3f3] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
X-ray diffraction and inelastic x-ray scattering measurements of liquid Ba8Ga16Sn30 have been carried out to investigate local structure and atomic dynamics in the liquid. The pair distribution function shows shorter and longer interatomic distances in the first coordination shell. The dynamic structure factor exhibits the inelastic excitations on both sides of the quasielastic central peak. The inelastic excitations disperse with increasing the momentum transfer, suggesting the longitudinal acoustic mode. We found a low energy excitation in addition to the longitudinal acoustic excitation in the dynamic structure factor and it reminds us a strong relationship with a rattling motion of a guest (Ba) atom in the solid state. The temperature dependence of the pair distribution function and the longitudinal acoustic excitation energy is very weak in a range from 600 to 900 °C. The result suggests that Ba and other atoms in the melt are located around minimum positions of the effective pair potential approximated as a harmonic one.
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Affiliation(s)
- M Inui
- Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 7319-8521, Japan
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21
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Uchiyama H, Oshima Y, Patterson R, Iwamoto S, Shiomi J, Shimamura K. Phonon Lifetime Observation in Epitaxial ScN Film with Inelastic X-Ray Scattering Spectroscopy. Phys Rev Lett 2018; 120:235901. [PMID: 29932681 DOI: 10.1103/physrevlett.120.235901] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 03/21/2018] [Indexed: 06/08/2023]
Abstract
Phonon-phonon scattering dominates the thermal properties in nonmetallic materials, and it directly influences device performance in applications. The understanding of the scattering has been progressing using computational approaches, and the direct and systematic observation of phonon modes that include momentum dependences is desirable. We report experimental data on the phonon dispersion curves and lifetimes in an epitaxially grown ScN film using inelastic x-ray scattering measurements. The momentum dependence of the optical phonon lifetimes is estimated from the spectral width, and the highest-energy phonon mode around the zone center is found to possess a short lifetime of 0.21 ps. A comparison with first-principles calculations shows that our observed phonon lifetimes are quantitatively explained by three-body phonon-phonon interactions.
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Affiliation(s)
- H Uchiyama
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Koto, Sayo, Hyogo 679-5198, Japan
| | - Y Oshima
- Optical Single Crystals Group, Environment and Energy Materials Research Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - R Patterson
- School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney 2052, Australia
| | - S Iwamoto
- Department of Mechanical Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
| | - J Shiomi
- Department of Mechanical Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
| | - K Shimamura
- Optical Single Crystals Group, Environment and Energy Materials Research Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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22
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Hayashi Y, Brun MA, Machida K, Lee S, Murata A, Omori S, Uchiyama H, Inoue Y, Kudo T, Toyofuku T, Nagasawa M, Uchimura I, Nakamura T, Muneta T. Simultaneous assessment of blood coagulation and hematocrit levels in dielectric blood coagulometry. Biorheology 2018; 54:25-35. [PMID: 28800301 PMCID: PMC5676769 DOI: 10.3233/bir-16118] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 01/15/2023]
Abstract
BACKGROUND In a whole blood coagulation test, the concentration of any in vitro diagnostic agent in plasma is dependent on the hematocrit level but its impact on the test result is unknown. OBJECTIVE The aim of this work was to clarify the effects of reagent concentration, particularly Ca2+, and to find a method for hematocrit estimation compatible with the coagulation test. METHODS Whole blood coagulation tests by dielectric blood coagulometry (DBCM) and rotational thromboelastometry were performed with various concentrations of Ca2+ or on samples with different hematocrit levels. DBCM data from a previous clinical study of patients who underwent total knee arthroplasty were re-analyzed. RESULTS Clear Ca2+ concentration and hematocrit level dependences of the characteristic times of blood coagulation were observed. Rouleau formation made hematocrit estimation difficult in DBCM, but use of permittivity at around 3 MHz made it possible. The re-analyzed clinical data showed a good correlation between permittivity at 3 MHz and hematocrit level (R2=0.83). CONCLUSIONS Changes in the hematocrit level may affect whole blood coagulation tests. DBCM has the potential to overcome this effect with some automated correction using results from simultaneous evaluations of the hematocrit level and blood coagulability.
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Affiliation(s)
- Yoshihito Hayashi
- LE Development Department, R&D Division, Medical Business Unit, Imaging Products & Solutions Sector, Sony Corporation, Tokyo, Japan
| | - Marc-Aurèle Brun
- Life Science Department, Biomedical R&D Division, RDS Platform, Sony Corporation, Tokyo, Japan
| | - Kenzo Machida
- LE Development Department, R&D Division, Medical Business Unit, Imaging Products & Solutions Sector, Sony Corporation, Tokyo, Japan
| | - Seungmin Lee
- LE Development Department, R&D Division, Medical Business Unit, Imaging Products & Solutions Sector, Sony Corporation, Tokyo, Japan
| | - Aya Murata
- LE Development Department, R&D Division, Medical Business Unit, Imaging Products & Solutions Sector, Sony Corporation, Tokyo, Japan
| | - Shinji Omori
- LE Development Department, R&D Division, Medical Business Unit, Imaging Products & Solutions Sector, Sony Corporation, Tokyo, Japan
| | - Hidetoshi Uchiyama
- Department of Surgical Specialities, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Yoshinori Inoue
- Department of Surgical Specialities, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Toshifumi Kudo
- Department of Surgical Specialities, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Takahiro Toyofuku
- Department of Surgical Specialities, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Masayuki Nagasawa
- Department of Pediatrics, Tokyo Medical and Dental University, Tokyo, Japan.,Department of Pediatrics, Musashino Red Cross Hospital, Musashino-city, Tokyo, Japan
| | - Isao Uchimura
- Department of Endocrinology and Metabolism, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tomomasa Nakamura
- Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan
| | - Takeshi Muneta
- Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan
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23
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Ugajin A, Uchiyama H, Miyata T, Sasaki T, Yajima S, Ono M. Identification and initial characterization of novel neural immediate early genes possibly differentially contributing to foraging-related learning and memory processes in the honeybee. Insect Mol Biol 2018; 27:154-165. [PMID: 29096051 DOI: 10.1111/imb.12355] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Despite possessing a limited number of neurones compared to vertebrates, honeybees show remarkable learning and memory performance, an example being 'dance communication'. In this phenomenon, foraging honeybees learn the location of a newly discovered food source and transmit the information to nestmates by symbolic abdomen vibrating behaviour, leading to navigation of nestmates to the new food source. As an initial step toward understanding the detailed molecular mechanisms underlying the sophisticated learning and memory performance of the honeybee, we focused on the neural immediate early genes (IEGs), which are specific genes quickly transcribed after neural activity without de novo protein synthesis. Although these have been reported to play an essential role in learning and memory processes in vertebrates, far fewer studies have been performed in insects in this regard. From RNA-sequencing analysis and subsequent assays, we identified three genes, Src homology 3 (SH3) domain binding kinase, family with sequence similarity 46 and GB47136, as novel neural IEGs in the honeybee. Foragers and/or orientating bees, which fly around their hives to memorize the positional information, showed induced expression of these IEGs in the mushroom body, a higher-order centre essential for learning and memory, indicating a possible role for the novel IEGs in foraging-related learning and memory processes in the honeybee.
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Affiliation(s)
- A Ugajin
- Laboratory of Applied Entomology and Zoology, Graduate School of Agriculture, Tamagawa University, Machida, Tokyo, Japan
| | - H Uchiyama
- NODAI Genome Research Center, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - T Miyata
- Department of Agri-Production Sciences, College of Agriculture, Tamagawa University, Machida, Tokyo, Japan
| | - T Sasaki
- Honeybee Science Research Center, Tamagawa University, Machida, Tokyo, Japan
| | - S Yajima
- NODAI Genome Research Center, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
- Department of Bioscience, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - M Ono
- Laboratory of Applied Entomology and Zoology, Graduate School of Agriculture, Tamagawa University, Machida, Tokyo, Japan
- Honeybee Science Research Center, Tamagawa University, Machida, Tokyo, Japan
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24
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Motomura T, Yoshizumi T, Wang H, Nagatsu A, Itoh S, Harada N, Harimoto N, Ikegami T, Uchiyama H, Soejima Y, Maehara Y. Duct-to-duct Biliary Reconstruction in Living-donor Liver Transplantation for Primary Sclerosing Cholangitis: Report of a Case. Transplant Proc 2017; 49:1196-1198. [PMID: 28583556 DOI: 10.1016/j.transproceed.2017.03.069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Although Roux-en Y hepaticojejunostomy was previously recommended for the biliary reconstruction in liver transplantation for primary sclerosing cholangitis (PSC), some recent reports showed no difference in the graft survival between Roux-en Y and duct-to-duct anastomosis in deceased-donor liver transplantation. On the other hand, considering the risk of recurrence and the short length of the bile duct of the graft, duct-to-duct biliary anastomosis has never been reported in a patient undergoing living-donor liver transplantation (LDLT) for PSC. A 45 year-old male underwent LDLT using a left-lobe graft donated from his brother. Cholangiography showed no lesion in his common bile duct and duct-to-duct anastomosis was chosen for him. Fifteen months later, he suffered cholangitis due to PSC recurrence and endoscopic retrograde cholangiography was performed. The stents were inserted into his B2 and B3, and he remains well. Because of the ability to easily manage biliary complication, duct-to-duct biliary reconstruction may become the first choice in LDLT for PSC without common bile duct lesions.
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Affiliation(s)
- T Motomura
- Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - T Yoshizumi
- Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
| | - H Wang
- Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - A Nagatsu
- Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - S Itoh
- Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - N Harada
- Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - N Harimoto
- Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - T Ikegami
- Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - H Uchiyama
- Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Y Soejima
- Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Y Maehara
- Department of Surgery and Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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25
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Ishibashi O, Sakuragi K, Fukutomi Y, Kawakami Y, Kamata Y, Sakurai M, Nakayama S, Uchiyama H, Kobayashi H, Kojima H, Inui T. Lip b 1 is a novel allergenic protein isolated from the booklouse, Liposcelis bostrychophila. Allergy 2017; 72:918-926. [PMID: 27873335 DOI: 10.1111/all.13091] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/18/2016] [Indexed: 11/26/2022]
Abstract
BACKGROUND Booklice, belonging to the order Psocoptera, are small household insect pests that are distributed worldwide. Liposcelis bostrychophila, a common home-inhabiting species of booklouse, infests old books, sheets of paper, and stored food. Recent entomological and serological studies demonstrated that L. bostrychophila accounted for the majority of detectable insects in house dust and could be a potent inducer of respiratory allergy. Our recent proteomic analysis identified a potent allergenic protein from L. bostrychophila, designated Lip b 1, and determined its partial amino acid sequences. METHODS Cloning of cDNAs for Lip b 1 was performed by large-scale transcriptome analysis (RNA-seq) and subsequent reverse transcription polymerase chain reaction. The full-length amino acid sequences deduced from Lip b 1 cDNAs were bioinformatically analyzed. The recombinant proteins of glutathione S-transferase (GST)-fused Lip b 1 were analyzed by Western blot and enzyme-linked immunosorbent assay. RESULTS Lip b 1 cDNAs encoding two types of 254-amino acid proteins were cloned. The clones shared 87% identity, and the deduced molecular weights and isoelectric points were consistent with those determined in our previous study. The two types of Lip b 1 proteins in the GST-fused form were similarly reactive with sera from allergic patients sensitized with L. bostrychophila. CONCLUSIONS Lip b 1 is a novel protein possibly causing booklouse allergy.
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Affiliation(s)
- O. Ishibashi
- Department of Applied Life Sciences; Graduate School of Life and Environmental Sciences; Osaka Prefecture University; Sakai Japan
| | - K. Sakuragi
- Department of Applied Life Sciences; Graduate School of Life and Environmental Sciences; Osaka Prefecture University; Sakai Japan
| | - Y. Fukutomi
- Clinical Research Center for Allergy and Rheumatology; Sagamihara National Hospital; Sagamihara Japan
| | - Y. Kawakami
- Laboratory of Environmental Science; FCG Research Institute Incorporation; Tokyo Japan
| | - Y. Kamata
- Department of Veterinary Medicine; Iwate University; Morioka Japan
| | - M. Sakurai
- Department of Applied Life Sciences; Graduate School of Life and Environmental Sciences; Osaka Prefecture University; Sakai Japan
| | - S. Nakayama
- Department of Applied Life Sciences; Graduate School of Life and Environmental Sciences; Osaka Prefecture University; Sakai Japan
| | - H. Uchiyama
- NODAI Genome Research Center; Tokyo University of Agriculture; Tokyo Japan
| | - H. Kobayashi
- NODAI Genome Research Center; Tokyo University of Agriculture; Tokyo Japan
| | - H. Kojima
- Department of Agriculture; Tokyo University of Agriculture; Atsugi Japan
| | - T. Inui
- Department of Applied Life Sciences; Graduate School of Life and Environmental Sciences; Osaka Prefecture University; Sakai Japan
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Soejima Y, Yoshizumi T, Ikegami T, Harimoto N, Harada N, Ito S, Motomura T, Uchiyama H, Maehara Y. In Situ Procurement of a Recipient's Portal Vein for a Right Lobe Liver Graft With Multiple Venous Orifices: A Case Report. Transplant Proc 2017; 49:172-174. [PMID: 28104129 DOI: 10.1016/j.transproceed.2016.10.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 09/27/2016] [Accepted: 10/27/2016] [Indexed: 11/28/2022]
Abstract
Reconstruction of multiple venous orifices of a right lobe graft is a time-consuming and troublesome procedure in right lobe living-donor liver transplantation. In the current study, we present a new venous reconstruction technique for a right lobe graft with multiple and complex hepatic vein (HV) orifices, in which procurement of the recipient's left portal vein was performed in situ to keep the anhepatic period to a minimum. All of the HV orifices were reconstructed together at the back table, while maintaining patency of the recipient's systemic and splanchnic circulation. A homologous vein graft and veno-venous bypass were not necessary. All HVs were patent during the follow-up and the patient was free from complications. In conclusion, the present technique is readily available for reconstruction of complex and multiple HV tributaries, while avoiding a long anhepatic time and the use of veno-venous bypass.
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Affiliation(s)
- Y Soejima
- Department of Surgery and Science, Kyushu University, Fukuoka, Japan.
| | - T Yoshizumi
- Department of Surgery and Science, Kyushu University, Fukuoka, Japan
| | - T Ikegami
- Department of Surgery and Science, Kyushu University, Fukuoka, Japan
| | - N Harimoto
- Department of Surgery and Science, Kyushu University, Fukuoka, Japan
| | - N Harada
- Department of Surgery and Science, Kyushu University, Fukuoka, Japan
| | - S Ito
- Department of Surgery and Science, Kyushu University, Fukuoka, Japan
| | - T Motomura
- Department of Surgery and Science, Kyushu University, Fukuoka, Japan
| | - H Uchiyama
- Department of Surgery and Science, Kyushu University, Fukuoka, Japan
| | - Y Maehara
- Department of Surgery and Science, Kyushu University, Fukuoka, Japan
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27
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Uchiyama H, Isobe K, Kozuka H. Preparation of porous CuO films from Cu(NO3)2 aqueous solutions containing poly(vinylpyrrolidone) and their photocathodic properties. RSC Adv 2017. [DOI: 10.1039/c6ra26590a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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] Open
Abstract
We prepared porous CuO photocathode films by dip coating from Cu(NO3)2 aqueous solutions containing poly(vinylpyrrolidone). The porous structure led to an efficient photocathodic reaction under the UV and visible light illumination.
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Affiliation(s)
- H. Uchiyama
- Department of Chemistry and Materials Engineering
- Kansai University
- Suita
- Japan
| | - K. Isobe
- Department of Chemistry and Materials Engineering
- Kansai University
- Suita
- Japan
| | - H. Kozuka
- Department of Chemistry and Materials Engineering
- Kansai University
- Suita
- Japan
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28
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Uchiyama H, Inoue Y, Uchimura I, Nakamura T, Kudo T, Muneta T, Kawano T. Prediction of Venous Thromboembolism after Total Knee Arthroplasty Using Dielectric Blood Coagulometry. Ann Vasc Surg 2016; 38:286-292. [PMID: 27522973 DOI: 10.1016/j.avsg.2016.05.099] [Citation(s) in RCA: 4] [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] [Received: 01/16/2016] [Revised: 04/11/2016] [Accepted: 05/18/2016] [Indexed: 10/21/2022]
Abstract
BACKGROUND Venous thromboembolism (VTE) including deep vein thrombosis (DVT) and pulmonary embolism (PE) frequently occurs in patients undergoing total knee arthroplasty (TKA). This study aimed to evaluate the efficacy of dielectric blood coagulometry (DBCM) as a new technique for predicting postoperative VTE. METHODS Thirty patients undergoing TKA were enrolled. DVT was diagnosed by ultrasonography preoperatively and on the fourth or fifth postoperative day. Enhanced computed tomography was performed to detect PE on the fourth postoperative day. The day after surgery, a blood sample was measured by DBCM. All patients received fondaparinux or low-molecular-weight heparin for postoperative thromboprophylaxis. RESULTS Eighteen of the 30 patients had DVT postoperatively, and 10 had asymptomatic PE. Seven patients had both DVT and PE. The patterns of permittivity as a function of time and frequency from the DBCM measurement were different between patients with and without VTE. The sensitivity and specificity of the parameter constructed from a set of permittivities at the frequencies of 2.5 kHz, 1 MHz, and 10 MHz were 90% and 78%, respectively. CONCLUSIONS DBCM was effective and efficient for predicting VTE after TKA.
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Affiliation(s)
- Hidetoshi Uchiyama
- Department of Esophageal and General Surgery, Tokyo Medical and Dental University Graduate School, Tokyo, Japan.
| | - Yoshinori Inoue
- Department of Esophageal and General Surgery, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Isao Uchimura
- Department of Endocrinology and Metabolism, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Tomomasa Nakamura
- Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan
| | - Toshifumi Kudo
- Department of Esophageal and General Surgery, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Takeshi Muneta
- Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, Tokyo, Japan
| | - Tatsuyuki Kawano
- Department of Esophageal and General Surgery, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
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29
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Itoh S, Shirabe K, Kimura K, Okabe H, Harimoto N, Ikegami T, Uchiyama H, Yoshizumi T, Ikeda T, Maehara Y. 219P Phase I study of sorafenib in combination with uracil-tegafur in patients with unresectable advanced hepatocellular carcinoma in Japan. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv523.80] [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: 11/14/2022] Open
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30
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Ikegami T, Yoshizumi T, Soejima Y, Harimoto N, Itoh S, Takeishi K, Uchiyama H, Kawanaka H, Yamashita YI, Tsujita E, Harada N, Oki E, Saeki H, Kimura Y, Shirabe K, Maehara Y. Triple therapy using direct-acting agents for recurrent hepatitis C after liver transplantation: a single-center experience. Transplant Proc 2015; 47:730-2. [PMID: 25891720 DOI: 10.1016/j.transproceed.2014.10.058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 10/05/2014] [Accepted: 10/28/2014] [Indexed: 11/16/2022]
Abstract
BACKGROUND Hepatitis C viral graft reinfection is almost a universal event after liver transplantation with consequent disease progression. METHODS We applied triple therapy (n = 21) with the use of telaprevir (TVR; n = 12) or simeprevir (SVR; n = 9). RESULTS TVR was given at the dose 1,500 mg daily (n = 11) with reduced dose of cyclosporine at 25% to 50%, and SVR was given at the dose 100 mg daily with unadjusted cyclosporine, followed by 12 weeks of dual therapy. The early viral response was achieved in 91.7% (n = 11), end of treatment response rate was 91.7% (n = 11), and sustained viral response rate was 83.3% (n = 10) in the TVR group, and respective rates were 88.9% (n = 8), 77.8% (n = 7), and 77.8% (n = 7) in the SVR group. Although granulocyte colony-stimulating factor was not given in the patients with triple therapy, blood transfusion was performed in 7 cases (58.3%) in the TVR group and 1 case (11.1%) in the SVR group. Interferon-mediated graft dysfunction was observed in 4 cases (33.3%) in the TVR group and 3 cases (33.3%) in the SVR group, respectively. The cumulative viral clearance rates in triple (n = 21) and dual (n = 105) therapy were 95.0% and 18.1% at 12 weeks, and 95.0% and 40.0%, respectively, at 24 weeks (P < .01). CONCLUSIONS Although careful monitoring for possible adverse events is required during treatment, triple therapy with the use of direct-acting agents are very effective in treating hepatitis C after liver transplantation.
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Affiliation(s)
- T Ikegami
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan.
| | - T Yoshizumi
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - Y Soejima
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - N Harimoto
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - S Itoh
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - K Takeishi
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - H Uchiyama
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - H Kawanaka
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - Y-I Yamashita
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - E Tsujita
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - N Harada
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - E Oki
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - H Saeki
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - Y Kimura
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - K Shirabe
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - Y Maehara
- Department of Surgery and Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
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31
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Fujioka J, Doi A, Okuyama D, Morikawa D, Arima T, Okada KN, Kaneko Y, Fukuda T, Uchiyama H, Ishikawa D, Baron AQR, Kato K, Takata M, Tokura Y. Ferroelectric-like metallic state in electron doped BaTiO3. Sci Rep 2015; 5:13207. [PMID: 26289749 PMCID: PMC4542543 DOI: 10.1038/srep13207] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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: 04/30/2015] [Accepted: 07/16/2015] [Indexed: 12/05/2022] Open
Abstract
We report that a ferroelectric-like metallic state with reduced anisotropy of polarization is created by the doping of conduction electrons into BaTiO3, on the bases of x-ray/electron diffraction and infrared spectroscopic experiments. The crystal structure is heterogeneous in nanometer-scale, as enabled by the reduced polarization anisotropy. The enhanced infrared intensity of soft phonon along with the resistivity reduction suggests the presence of unusual electron-phonon coupling, which may be responsible for the emergent ferroelectric structure compatible with metallic state.
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Affiliation(s)
- J. Fujioka
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
| | - A. Doi
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
| | - D. Okuyama
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - D. Morikawa
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - T. Arima
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
- Department of Advanced Materials Science, University of Tokyo, Kashiwa 227-8561 Japan
| | - K. N. Okada
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
| | - Y. Kaneko
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
| | - T. Fukuda
- Syncrotron Radiation Research Unit, JAEA/SPring-8, Sayo, Hyogo 679-5148, Japan
- Materials Dynamics Laboratory, RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - H. Uchiyama
- Materials Dynamics Laboratory, RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
- Research and Utilization Division, JASRI/SPring-8, Sayo, Hyogo 679-5198, Japan
| | - D. Ishikawa
- Materials Dynamics Laboratory, RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
- Research and Utilization Division, JASRI/SPring-8, Sayo, Hyogo 679-5198, Japan
| | - A. Q. R. Baron
- Materials Dynamics Laboratory, RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
- Research and Utilization Division, JASRI/SPring-8, Sayo, Hyogo 679-5198, Japan
| | - K. Kato
- Structural Materials Science Laboratory, RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - M. Takata
- Structural Materials Science Laboratory, RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan
| | - Y. Tokura
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo, Hongo, Tokyo 113-8656, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
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Ninomiya M, Shirabe K, Kayashima H, Ikegami T, Nishie A, Harimoto N, Yamashita Y, Yoshizumi T, Uchiyama H, Maehara Y. Functional assessment of the liver with gadolinium-ethoxybenzyl-diethylenetriamine penta-acetate-enhanced MRI in living-donor liver transplantation. Br J Surg 2015; 102:944-51. [PMID: 25925288 DOI: 10.1002/bjs.9820] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 11/28/2014] [Accepted: 03/05/2015] [Indexed: 12/28/2022]
Abstract
BACKGROUND A precise estimation of the capacity of the remnant liver following partial liver resection is important. In this study, the regional function of the liver in patients undergoing living-donor liver transplantation was evaluated by gadolinium-ethoxybenzyl-diethylenetriamine penta-acetic acid (EOB)-enhanced MRI, with special reference to the congested region. METHODS EOB-MRI analysis was performed before hepatectomy in donors, and 7 days after surgery in the donor and recipient. In the hepatocyte phase, from images obtained 15 min after Primovist® injection, the signal intensity in each liver segment was measured and divided by the signal intensity of the erector spinae muscle (liver to muscle ratio, LMR) for standardization. Inter-regional differences in LMRs were analysed in donors and recipients. RESULTS Thirty-two living donors and 31 recipients undergoing living-donor liver transplantation were enrolled. In donors, the LMRs of the remnant left lobe were almost equivalent among the liver segments. In the remnant right lobe without the middle hepatic vein, the mean(s.d.) LMR for congested segments (S5 and S8) was significantly lower than that for non-congested segments (S6 and S7): 2·60(0·52) versus 3·64(0·56) respectively (P < 0·001). After surgery, values in the non-congested region were almost identical to those in the preoperative donor liver. LMR values in the left and right lobe graft were significantly lower than those in the corresponding segment before donor surgery (P < 0·001). CONCLUSION The function of the congested region secondary to outflow obstruction in the remnant donor liver was approximately 70 per cent of that in the non-congested region. EOB-MRI is a promising tool to assess regional liver function, with good spatial resolution.
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Affiliation(s)
- M Ninomiya
- Departments of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - K Shirabe
- Departments of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - H Kayashima
- Departments of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - T Ikegami
- Departments of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - A Nishie
- Departments of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - N Harimoto
- Departments of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Y Yamashita
- Departments of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - T Yoshizumi
- Departments of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - H Uchiyama
- Departments of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Y Maehara
- Departments of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Yoshizumi T, Itoh S, Imai D, Ikegami T, Ninomiya M, Iguchi T, Harimoto N, Takeishi K, Kimura Y, Uchiyama H, Soejima Y, Ikeda T, Kawanaka H, Shirabe K, Maehara Y. Impact of Platelets and Serotonin on Liver Regeneration After Living Donor Hepatectomy. Transplant Proc 2015; 47:683-5. [DOI: 10.1016/j.transproceed.2014.11.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 10/29/2014] [Accepted: 11/18/2014] [Indexed: 12/13/2022]
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Uchiyama H, Nakanishi S, Kozuka H. Biomimetic synthesis of nanostructured SnO particles from Sn6O4(OH)4in aqueous solution of gelatin. CrystEngComm 2015. [DOI: 10.1039/c4ce01829j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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35
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Uchiyama H, Ito T, Sasaki R, Kozuka H. Preparation of metal oxide thin films from organic-additive-free aqueous solutions by low-speed dip-coating. RSC Adv 2015. [DOI: 10.1039/c4ra16810k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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] Open
Abstract
Transparent, crack-free SnO2 and TiO2 precursor films were obtained from organic-additive-free aqueous solutions by low-speed dip-coating. The precursor films were crystallized to SnO2 and TiO2 by the heat treatment at 700 °C for 10 min in air.
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Affiliation(s)
- H. Uchiyama
- Department of Chemistry and Materials Engineering
- Kansai University
- Suita
- Japan
| | - T. Ito
- Department of Chemistry and Materials Engineering
- Kansai University
- Suita
- Japan
| | - R. Sasaki
- Department of Chemistry and Materials Engineering
- Kansai University
- Suita
- Japan
| | - H. Kozuka
- Department of Chemistry and Materials Engineering
- Kansai University
- Suita
- Japan
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36
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Harimoto N, Ikegami T, Nakagawara H, Yamashita YI, Yoshizumi T, Uchiyama H, Soejima Y, Ikeda T, Shirabe K, Aishima S, Oda Y, Maehara Y. Chronic Immune-Mediated Reaction Syndrome as the Cause of Late Graft Mortality in Living-Donor Liver Transplantation for Primary Biliary Cirrhosis. Transplant Proc 2014; 46:1438-43. [DOI: 10.1016/j.transproceed.2014.02.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 02/27/2014] [Indexed: 12/22/2022]
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37
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Igari K, Kudo T, Uchiyama H, Toyofuku T, Inoue Y. Indocyanine green angiography for the diagnosis of peripheral arterial disease with isolated infrapopliteal lesions. Ann Vasc Surg 2014; 28:1479-84. [PMID: 24704053 DOI: 10.1016/j.avsg.2014.03.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 03/05/2014] [Accepted: 03/11/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND In this study, we evaluated the accuracy of the indocyanine green angiography (ICGA) test to diagnose peripheral arterial disease (PAD) with isolated infrapopliteal lesions. METHODS This study was undertaken from a retrospective review of PAD patients with isolated infrapopliteal lesions who underwent ICGA between November 2012 and July 2013. We calculated the ICGA parameters while comparing the findings with the ankle-brachial index (ABI) and toe-brachial index (TBI) in patients with infrapopliteal lesions. RESULTS Twenty-three limbs with isolated infrapopliteal lesions in 14 PAD patients and 15 limbs without arterial lesions in 9 control patients were examined using ABI, TBI, and ICGA. The Td 90% (the time elapsed from the maximum intensity to 90% of the maximum intensity) correlated most significantly with the ABI value. A cutoff value of Td 90% >25 sec also significantly correlated with the presence of PAD (sensitivity, 82.6%). CONCLUSIONS ICGA might therefore be useful for assessing the peripheral perfusion quantitatively, even in PAD patients with isolated infrapopliteal lesions. The use of Td 90% on ICGA may also be effective for accurately estimating the presence of PAD.
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Affiliation(s)
- Kimihiro Igari
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Toshifumi Kudo
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hidetoshi Uchiyama
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takahiro Toyofuku
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoshinori Inoue
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
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38
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Igari K, Kudo T, Uchiyama H, Toyofuku T, Inoue Y. Quantitative evaluation of microvascular dysfunction in peripheral neuropathy with diabetes by indocyanine green angiography. Diabetes Res Clin Pract 2014; 104:121-5. [PMID: 24552681 DOI: 10.1016/j.diabres.2014.01.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [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: 11/18/2013] [Revised: 01/03/2014] [Accepted: 01/17/2014] [Indexed: 11/23/2022]
Abstract
AIMS Peripheral neuropathy in diabetes (PND) plays a central role in foot ulceration with diabetes, and leads to an abnormal microvascular structure, including arteriovenous shunting. To assess the extent of arteriovenous shunting we performed indocyanine green angiography (ICGA) in patients with diabetes and evaluated quantitative ICGA parameters. METHODS Between November 2012 and July 2013, twenty-six limbs in 14 patients with PND and twenty-three limbs in 15 patients without PND underwent ICGA testing. The ICGA parameters, which included the time to maximum intensity (Tmax), the time from fluorescence onset to half the maximum intensity (T1/2), the time elapsed from the maximum intensity to 90% of the Imax and to 75% of the Imax (Td 90% and Td 75%, respectively) and the rate of intensity measured 60s after the Tmax to Imax (IR 60s), were compared between the patients with and without PND. RESULTS The Tmax, T1/2, Td 90%, Td 75% and IR 60s were significantly different between patients with and without PND. A value of Td 90% >30s was significantly correlated with the presence of PND (sensitivity: 0.85, specificity: 0.78). CONCLUSIONS ICGA tests can be used to quantitatively assess arteriovenous shunting in the limbs with PND. By measuring the value of the Td 90%, ICGA tests can estimate the presence of the arterio-venous shunting in PND, which might be helpful for assessing the progression of foot ulceration with diabetes, gangrene and the need for amputation.
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Affiliation(s)
- Kimihiro Igari
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Toshifumi Kudo
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hidetoshi Uchiyama
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takahiro Toyofuku
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoshinori Inoue
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
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39
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Yoshizumi T, Shirabe K, Ikegami T, Yamashita N, Mano Y, Yoshiya S, Matono R, Harimoto N, Uchiyama H, Toshima T, Maehara Y. Decreased immunoglobulin G levels after living-donor liver transplantation is a risk factor for bacterial infection and sepsis. Transpl Infect Dis 2014; 16:225-31. [DOI: 10.1111/tid.12188] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 07/04/2013] [Accepted: 08/03/2013] [Indexed: 11/26/2022]
Affiliation(s)
- T. Yoshizumi
- Department of Surgery and Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | - K. Shirabe
- Department of Surgery and Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | - T. Ikegami
- Department of Surgery and Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | - N. Yamashita
- Clinical Research Center; Shikoku Cancer Center; Matsuyama Japan
| | - Y. Mano
- Department of Surgery and Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | - S. Yoshiya
- Department of Surgery and Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | - R. Matono
- Department of Surgery and Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | - N. Harimoto
- Department of Surgery and Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | - H. Uchiyama
- Department of Surgery and Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | - T. Toshima
- Department of Surgery and Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
| | - Y. Maehara
- Department of Surgery and Science; Graduate School of Medical Sciences; Kyushu University; Fukuoka Japan
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Igari K, Kudo T, Uchiyama H, Toyofuku T, Inoue Y. Early experience with the endowedge technique and snorkel technique for endovascular aneurysm repair with challenging neck anatomy. Ann Vasc Dis 2014; 7:46-51. [PMID: 24719662 DOI: 10.3400/avd.oa.13-00110] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 11/17/2013] [Accepted: 01/21/2014] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES This study was evaluating the outcomes of endovascular aneurysm repair (EVAR) using the endowedge technique (EnT) and/or snorkel technique (SnT) for abdominal aortic aneurysms (AAAs). MATERIALS AND METHODS The patients treated with EnT and/or SnT were retrospectively reviewed between January 2010 and June 2013. All patients underwent EVAR under general anesthesia. Bilateral femoral arterial access was obtained through bilateral femoral cut-down to place the stent graft mainbody, and brachial arterial access was obtained percutaneously to perform the EnT and/or SnT. RESULTS Three patients were treated with unilateral EnT, 1 with unilateral SnT, two with bilateral SnT, and two with combined EnT/SnT. A total of 12 renal arteries was attempted to preserve, and could be successfully performed by these techniques in 11 renal arteries. After complete deployment of the endograft, intraoperative angiography showed no type Ia EL. During the median follow-up of 11 months (range: 2-22 months), no deaths nor aneurysm enlargement occurred, and all treated renal arteries were patent without further intervention. CONCLUSIONS Our findings suggest that the management of AAAs by EVAR with EnT and/or SnT could achieve an adequate proximal seal, and preserve renal artery perfusion in patients with unfavorable neck anatomy.
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Affiliation(s)
- Kimihiro Igari
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Toshifumi Kudo
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hidetoshi Uchiyama
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takahiro Toyofuku
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoshinori Inoue
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
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Igari K, Kudo T, Uchiyama H, Toyofuku T, Inoue Y. Intraarterial injection of indocyanine green for evaluation of peripheral blood circulation in patients with peripheral arterial disease. Ann Vasc Surg 2014; 28:1280-5. [PMID: 24583370 DOI: 10.1016/j.avsg.2013.12.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2013] [Revised: 11/23/2013] [Accepted: 12/02/2013] [Indexed: 01/23/2023]
Abstract
BACKGROUND To assess the peripheral blood flow of patients with peripheral arterial disease (PAD) by indocyanine green (ICG) arteriography (ICGA) with intraarterial injection of ICG and evaluate the efficacy of the ICGA tests. METHODS This study was undertaken from a retrospective review of patients with PAD who underwent ICGA tests during digital subtraction angiography (DSA) between November 2012 and June 2013. We defined some ICGA parameters as the magnitude of intensity of ICG, the time to maximum intensity, and the time from fluorescence onset to half the maximum intensity (T1/2). The ICGA parameters were evaluated in 2 regions, named regions of interest (ROIs). ROI 1 was part of the dorsum of the foot from the Chopart joint to the Lisfranc joint. ROI 2 was in the distal region of the first metatarsal bone and compared with the ankle-brachial pressure index (ABI), ankle pressure, toe-brachial pressure index, and toe pressure. RESULTS A total of 22 limbs in 16 patients with PAD underwent ICGA tests during DSA. The T1/2 on ROI 2 was the most correlated with the ABI (ρ=-0.622, P=0.003). A value of T1/2 for ROI 2>10 sec was significantly correlated with an ABI value of <0.7 (sensitivity: 0.85, specificity: 1.0). CONCLUSIONS By measuring the value of T1/2 in ROI 2, ICGA tests can be performed to assess the peripheral blood circulation during DSA. ICGA tests might help to promptly assess the peripheral blood flow during endovascular treatment procedures.
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Affiliation(s)
- Kimihiro Igari
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Toshifumi Kudo
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hidetoshi Uchiyama
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takahiro Toyofuku
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoshinori Inoue
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
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Uchiyama H, Shirabe K, Nakagawara H, Ikegami T, Toshima T, Soejima Y, Yoshizumi T, Yamashita YI, Harimoto N, Ikeda T, Maehara Y. Revisiting the safety of living liver donors by reassessing 441 donor hepatectomies: is a larger hepatectomy complication-prone? Am J Transplant 2014; 14:367-74. [PMID: 24472194 DOI: 10.1111/ajt.12559] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [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: 07/19/2013] [Revised: 09/12/2013] [Accepted: 09/13/2013] [Indexed: 01/25/2023]
Abstract
Donor safety is of paramount importance in performing living donor liver transplantation (LDLT). We retrospectively reviewed donor medical records to confirm whether larger donor hepatectomy is absolutely complication-prone. A total of 441 living donor hepatectomies were performed between October 1996 and July 2012 in our institute, which were divided into three eras (Era I, October 1996 to March 2004; Era II, April 2004 to March 2008; Era III, April 2008 to July 2012) and the incidences of postoperative complications were compared among the three types of hepatectomy-right hepatectomy (RH), left hepatectomy (LH) and left lateral segmentectomy (LLS). Although severe complications (Clavien's grade 3 or more) frequently occurred in RH in Eras I and II (15.4% and 10.7%, respectively), the incidence in Era III decreased to the comparable level observed in LH and LLS (5.4% in RH, 2.3% in LH and 5.3% in LLS). The incidence of postoperative complications did not relate to the type of hepatectomy selected in the latest era. Since most complications after hepatectomy were considered preventable, step-by-step meticulous surgical procedures are a prerequisite for further assuring donor safety irrespective of the type of hepatectomy selected.
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Affiliation(s)
- H Uchiyama
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Igari K, Hirokawa M, Uchiyama H, Toyofuku T, Kudo T, Jibiki M, Kurihara N, Inoue Y. Anatomical variation at the sapheno-femoral junction. Ann Vasc Dis 2013; 6:702-5. [PMID: 24386018 DOI: 10.3400/avd.oa.13-00087] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [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: 09/16/2013] [Accepted: 09/22/2013] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE The aim of this study was to assess the anatomical variations of the sapheno-femoral junction (SFJ) and the incidence of these variations. MATERIALS AND METHODS Between April 2005 and March 2010, 2552 limbs of 1563 patients with complaints of varicose veins underwent ultrasonography. Ultrasonography was used to identify the anatomical variations of the SFJ, especially the relationship to the femoral artery. RESULTS Variations were seen in six limbs (0.24%) at the SFJ. The most common anatomical variation was the great saphenous vein crossing posterior to the common femoral artery, which was present in three limbs. CONCLUSION It is important to investigate the anomalies of the SFJ using preoperative duplex ultrasound, although the incidence of such anomalies is lower than that of the sapheno-popliteal junction. An anomaly of the SFJ always should be taken into consideration in order to minimize surgical complications of varicose veins. (English translation of Jpn J Phlebol 2012; 23: 25-29).
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Affiliation(s)
- Kimihiro Igari
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | | | - Hidetoshi Uchiyama
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takahiro Toyofuku
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Toshifumi Kudo
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | - Masatoshi Jibiki
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
| | | | - Yoshinori Inoue
- Division of Vascular and Endovascular Surgery, Department of Surgery, Tokyo Medical and Dental University, Tokyo, Japan
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Jibiki M, Inoue Y, Terasaki H, Igari K, Uchiyama H, Miyai M, Kagayama T. The effect of short saphenous vein stripping in patients with deep venous reflux. Ann Vasc Dis 2013; 6:612-6. [PMID: 24130617 DOI: 10.3400/avd.oa.13-00014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 02/17/2013] [Accepted: 06/01/2013] [Indexed: 11/13/2022] Open
Abstract
OBJECT We assessed whether or not deep venous reflux (DVR) improved after short saphenous vein (SSV) stripping was performed in patients with SSV reflux and DVR. MATERIALS AND METHODS Sixty-eight patients with SSV reflux who underwent SSV striping every Monday between 2008 and 2011 at Ryougoku Ashino Clinic were enrolled in this study. Forty-six of the 68 patients were selected for the analysis because they underwent duplex ultrasound examinations before and after the operation. The DVR was classified into four categories: type 0, no reflux; type I, reflux in popliteal vein; type II, reflux from popliteal vein to the middle of the superficial femoral vein (SFV) and type III, reflux from the popliteal vein to the SFV. RESULTS There were 23, 13, 2 and 8 patients with type 0, I, II, III before operation, respectively. There were 33, 8, 1, 4 patients with type 0, I, II, III after operation, respectively. There were no changes in 29 patients, improvement in 15 and new DVR in three (type 0 to I). CONCLUSION SSV stripping is feasible in patients with DVR and the DVR might not be deteriorated even though that is performed.
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Affiliation(s)
- Masatoshi Jibiki
- Department of Vascular Surgery, Tokyo Medical and Dental University, Tokyo, Japan ; Department of Vascular Surgery, Ryougoku Ashino Clinic, Tokyo, Japan
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Igari K, Toyofuku T, Uchiyama H, Koizumi S, Yonekura K, Kudo T, Jibiki M, Sugano N, Inoue Y. Maggot debridement therapy for peripheral arterial disease. Ann Vasc Dis 2013; 6:145-9. [PMID: 23825493 DOI: 10.3400/avd.oa.13-00036] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [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: 04/15/2013] [Accepted: 04/21/2013] [Indexed: 11/13/2022] Open
Abstract
INTRODUCTION Maggots are potent debriding agents capable of removing necrotic tissue and slough; however, it is still unclear which wounds are most likely to benefit from maggot debridement therapy (MDT). Thus, we performed this retrospective review to gain insight into the patient and therapy characteristics influencing outcome. PATIENTS AND METHODS We reviewed patients with foot ulcers caused by critical limb ischemia, encountered during the period between June 2005 and May 2010. The treatment outcomes were defined as effective or ineffective. RESULTS There were 16 patients with 16 leg ulcers. The patients were 13 men and 3 women, with an average age of 67.2 years (range, 47-85 years). Ten (63%) of the 16 ulcers were treated effectively. According to univariate analyses, an ankle brachial pressure index (ABI) lower than 0.6 (p = 0.03) had a negative impact on the outcome of MDT; however, outcome was not influenced by gender, obesity, ischemic heart disease, diabetes mellitus, hemodialysis, smoking, or laboratory findings. CONCLUSIONS Some patient characteristics, such as gender, obesity, ischemic heart disease, diabetes mellitus, hemodialysis, and smoking, do not seem to contraindicate eligibility for MDT. However, a limb with an ABI lower than 0.6 is less likely to benefit. (English Translation of J Jpn Coll Angiol 2011; 51: 209-213.).
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Affiliation(s)
- Kimihiro Igari
- Department of Vascular Surgery, Tokyo Medical and Dental University, Tokyo, Japan
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Saeki H, Morita M, Harada N, Egashira A, Oki E, Uchiyama H, Ohga T, Kakeji Y, Sakaguchi Y, Maehara Y. Esophageal replacement by colon interposition with microvascular surgery for patients with thoracic esophageal cancer: the utility of superdrainage. Dis Esophagus 2013; 26:50-6. [PMID: 22394201 DOI: 10.1111/j.1442-2050.2012.01327.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [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: 12/11/2022]
Abstract
Replacing the thoracic esophagus with the colon is one mode of reconstruction after esophagectomy for esophageal cancer. There is, however, a high incidence of postoperative necrosis of the transposed colon. This study evaluated the outcomes of colon interposition with the routine use of superdrainage by microvascular surgery. Twenty-one patients underwent colon interposition from 2004 to 2009. The strategy for colon interposition was to: (i) use the right hemicolon; (ii) reconstruct via the subcutaneous route; (iii) perform a microvascular venous anastomosis for all patients; and (iv) perform a microvascular arterial anastomosis when the arterial blood flow was insufficient. The clinicopathologic features, surgical findings, and outcomes were investigated. The colon was used because of a previous gastrectomy in 18 patients (85.7%) and synchronous gastric cancer in three patients (14.3%). Eight patients (38.1%) underwent preoperative chemoradiotherapy including three (14.3%) treated with definitive chemoradiotherapy. Seven patients (33.3%) underwent microvascular arterial anastomosis to supplement the right colon blood supply. Pneumonia occurred in four patients (19.0%). Anastomotic leakage was observed in five patients (23.8%); however, no colon necrosis was observed. The 3-year and 5-year overall survival rates were both 50.6%. Colon interposition with superdrainage results in successful treatment outcomes. This technique is one option for colon interposition employing the right hemicolon.
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Affiliation(s)
- H Saeki
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University Department of Gastroenterological Surgery, National Kyushu Cancer Center, Fukuoka, Japan.
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Soejima Y, Shirabe K, Taketomi A, Yoshizumi T, Uchiyama H, Ikegami T, Ninomiya M, Harada N, Ijichi H, Maehara Y. Left lobe living donor liver transplantation in adults. Am J Transplant 2012; 12:1877-85. [PMID: 22429497 DOI: 10.1111/j.1600-6143.2012.04022.x] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Adult left lobe (LL) living donor liver transplantation (LDLT) has not generally been recognized as a feasible procedure because of the problem of graft size. The objectives of this study were to assess the feasibility and short- and long-term results of adult LL LDLT in comparison with right lobe (RL) LDLT. Data on 200 consecutive LL LDLTs, including five retransplants, were retrospectively compared with those of 112 RL LDLTs, in terms of survival, complications and donor morbidity. The mean graft weight to standard volume ratio of LL grafts was 38.7% whereas that of RL grafts was 47.6% (p < 0.0001). The 1-, 5- and 10-year patient survival rates of LL LDLT were 85.6%, 77.9% and 69.5%, respectively, which were comparable to those of RL LDLT (89.8%, 71.3% and 70.7%, respectively). The incidence of small-for-size syndrome was higher in LL LDLT (19.5%) than in RL LDLT (7.1%) (p < 0.01). The overall donor morbidity rates were comparable between LL (36.0%) and RL (34.8%), whereas postoperative liver function tests and hospital stay were significantly better (p < 0.0001) in LL donors. In conclusion, adult LL LDLT has comparable outcomes to that of RL LDLT. LL LDLT is viable and is the first choice in adult LDLT.
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Affiliation(s)
- Y Soejima
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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Ikegami T, Shirabe K, Yoshizumi T, Aishima S, Taketomi YA, Soejima Y, Uchiyama H, Kayashima H, Toshima T, Maehara Y. Primary graft dysfunction after living donor liver transplantation is characterized by delayed functional hyperbilirubinemia. Am J Transplant 2012; 12:1886-97. [PMID: 22494784 DOI: 10.1111/j.1600-6143.2012.04052.x] [Citation(s) in RCA: 50] [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] [Indexed: 01/25/2023]
Abstract
The purpose of this study is to propose a new concept of primary graft dysfunction (PGD) after living donor liver transplantation (LDLT), characterized by delayed functional hyperbilirubinemia (DFH) and a high early graft mortality rate. A total of 210 adult-to-adult LDLT grafts without anatomical, immunological or hepatitis-related issues were included. All of the grafts with early mortality (n = 13) caused by PGD in LDLT had maximum total bilirubin levels >20 mg/dL after postoperative day 7 (p < 0.001). No other factors, including prothrombin time, ammonia level or ascites output after surgery were associated with early mortality. Thus, DFH of >20 mg/dL for >seven consecutive days occurring after postoperative day 7 (DFH-20) was used to characterize PGD. DFH-20 showed high sensitivity (100%) and specificity (95.4%) for PGD with early mortality. Among the grafts with DFH-20 (n = 22), those with early mortality (n = 13) showed coagulopathy (PT-INR > 2), compared with those without mortality (p = 0.002). Pathological findings in the grafts with DFH-20 included hepatocyte ballooning and cholestasis, which were particularly prominent in the centrilobular zone. PGD after LDLT is associated with DFH-20 caused by graft, recipient and surgical factors, and increases the risk of early graft mortality.
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Affiliation(s)
- T Ikegami
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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Kono C, Yamaguchi T, Yamada Y, Uchiyama H, Kono M, Takeuchi M, Sugiyamas Y, Azuma A, Kudoh S, Sakurai T, Tatsumi K. Historical changes in epidemiology of diffuse panbronchiolitis. Sarcoidosis Vasc Diffuse Lung Dis 2012; 29:19-25. [PMID: 23311119] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND AND OBJECTIVE Japanese pulmonologists, experienced in treating patients with diffuse panbronchiolitis (DPB) prior to the 1980s, have uniformly observed that new incidences of DPB are now a rare event in Japan. However, there is no epidemiological data to support this observation. We examined epidemiological trends of the number of patients with DPB in a large company. DESIGN The computerized health records of JR East Company employees were used to identify patients with DPB and then these were followed up using the assessments of these patients in JR Tokyo General Hospital and two other JR hospitals. The whole study period was 27 years (1976-2003), although detailed analyses were carried out for three specific periods; the first was 1976-1980, the second was 1989-1993, and the third was 1999-2003. RESULTS In the first period, 11 DPB cases (four incidence, and seven prevalence) were detected among a total of 355,572 workers. In the second period, three DPB cases (one incidence, and two prevalence) were identified from a total of 180,359 workers. In the third period, no case was found in a total of 144,485 workers. CONCLUSION This epidemiological trend suggests that both the incidence and prevalence of DPB may have decreased.
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Affiliation(s)
- C Kono
- Department of Respiratory Medicine, Japan Railway Tokyo General Hospital, Japan. Japan
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Sanefuji K, Ikegami T, Nagata S, Sugimachi K, Gion T, Uchiyama H, Soejima Y, Taketomi A, Shirabe K, Maehara Y. End-stage liver cirrhosis with severe autoimmune hemolytic anemia, treated by blood type-incompatible living donor liver transplantation: a case report. Transplant Proc 2011; 43:2087-9. [PMID: 21693332 DOI: 10.1016/j.transproceed.2011.02.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Revised: 01/13/2011] [Accepted: 02/02/2011] [Indexed: 11/16/2022]
Abstract
We present a case of successful living donor liver transplantation (LDLT) for liver cirrhosis caused by hepatitis B virus with severe autoimmune hemolytic anemia (AIHA) using an ABO-incompatible (ABOi) graft. The patient was a 47-year-old woman who had a history of ruptured esophageal varices, accumulation of intractable ascites, frequent hepatic encephalopathy and severe anemia, with a hemoglobin value of approximately 3 g/dL due to AIHA. We treated the patient by LDLT using an ABOi liver graft. The treatment strategy included anti-CD20 antibody, plasma exchange and transfusion before LDLT. The patient's anemia improved after surgery; she required only 2 units of irradiated red blood cell concentrates-leukocytes reduced. The patient was discharged from the hospital on postoperative day 35. Two years after surgery, the patient still shows normal hepatic and hematological findings. The immunomodulation protocol for ABOi LDLT was effective not only to avoid humoral reactions associated with ABOi LDLT, but also those associated with AIHA.
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Affiliation(s)
- K Sanefuji
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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