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Scheurle A, Kunisch E, Boccaccini AR, Walker T, Renkawitz T, Westhauser F. Boric acid and Molybdenum trioxide synergistically stimulate osteogenic differentiation of human bone marrow-derived mesenchymal stromal cells. J Trace Elem Med Biol 2024; 83:127405. [PMID: 38325181 DOI: 10.1016/j.jtemb.2024.127405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 01/15/2024] [Accepted: 01/29/2024] [Indexed: 02/09/2024]
Abstract
INTRODUCTION Metals and their metal ions have been shown to exhibit certain biological functions that make them attractive for use in biomaterials, for example in bone tissue engineering (BTE) applications. Recent data shows that Molybdenum (Mo) is a potent inducer of osteogenic differentiation in human bone marrow-derived mesenchymal stromal cells (BMSCs). On the other hand, while boron (B) has been shown to enhance vascularization in BTE applications, its impact on osteogenic differentiation is volatile: while improved osteogenic differentiation has been described, other data show that B might slow down osteogenic differentiation or reduce the calcification of the extracellular matrix (ECM) when applied in higher doses. Still, the combination of pro-osteogenic Mo and pro-angiogenic B is certainly attractive in the context of biomaterials intended for the use in BTE. METHODS Therefore, the combined effect of molybdenum trioxide and boric acid at different ratios was investigated in this study to evaluate the effects on the viability, proliferation, osteogenic differentiation, ECM production and maturation of BMSCs. RESULTS Mo ions proved to be stronger osteoinductive compared to B, in fact, while some osteogenic differentiation markers were downregulated in the presence of B, the presence of Mo provided compensation. The combined application of B and Mo indicated a combination of individual effects, partially even enhancing the expected combined performance of the single stimulations. CONCLUSIONS The combination of B and Mo might be beneficial for BTE applications since the limited osteogenic properties of B can be compensated by Mo. Furthermore, since B is known to be pro-angiogenic, the combination of both substances may synergistically lead to improved vascularization and bone regeneration. Future studies should assess the angiogenic performance of this combination in greater detail.
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Affiliation(s)
- A Scheurle
- Department of Orthopedics, Heidelberg University Hospital, Heidelberg, Germany
| | - E Kunisch
- Department of Orthopedics, Heidelberg University Hospital, Heidelberg, Germany
| | - A R Boccaccini
- Institute of Biomaterials, University of Erlangen-Nuremberg, Erlangen, Germany
| | - T Walker
- Department of Orthopedics, Heidelberg University Hospital, Heidelberg, Germany
| | - T Renkawitz
- Department of Orthopedics, Heidelberg University Hospital, Heidelberg, Germany
| | - F Westhauser
- Department of Orthopedics, Heidelberg University Hospital, Heidelberg, Germany.
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Westhauser F, Doll J, Bangert Y, Walker T, Reiner T, Renkawitz T. [Treatment of unicompartmental osteoarthritis of the knee]. Orthopadie (Heidelb) 2023:10.1007/s00132-023-04391-5. [PMID: 37318534 DOI: 10.1007/s00132-023-04391-5] [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] [Subscribe] [Scholar Register] [Accepted: 04/27/2023] [Indexed: 06/16/2023]
Abstract
Osteoarthritis of the knee is one of the most important degenerative joint diseases in the clinical routine. The treatment of knee osteoarthritis is not only based on the stage, symptoms and duration of the joint disease, but also depends on the existing arthrosis pattern. In the case of unicompartmental arthrosis, damage typical for osteoarthritis is limited to just one joint compartment. Both the conservative and the surgical treatment of unicompartmental osteoarthritis of the knee have to respect the individual characteristics of the respective forms of osteoarthritis. In the context of this manuscript, the genesis, the diagnostics and the guideline-based stage-adapted conservative and operative treatment of unicompartmental osteoarthritis of the knee are addressed.
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Affiliation(s)
- F Westhauser
- Orthopädische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität, Schlierbacher Landstr. 200a, 69118, Heidelberg, Deutschland
| | - J Doll
- Orthopädische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität, Schlierbacher Landstr. 200a, 69118, Heidelberg, Deutschland
| | - Y Bangert
- Orthopädische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität, Schlierbacher Landstr. 200a, 69118, Heidelberg, Deutschland
| | - T Walker
- Orthopädische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität, Schlierbacher Landstr. 200a, 69118, Heidelberg, Deutschland
| | - T Reiner
- Orthopädische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität, Schlierbacher Landstr. 200a, 69118, Heidelberg, Deutschland
| | - T Renkawitz
- Orthopädische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität, Schlierbacher Landstr. 200a, 69118, Heidelberg, Deutschland.
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Bruhaug G, Rinderknecht HG, E Y, Wei MS, Brannon RB, Guy D, Peck RG, Landis N, Brent G, Fairbanks R, McAtee C, Walker T, Buczek T, Krieger M, Romanofsky MH, Milhem C, Francis KG, Zhang XC, Collins GW, Rygg JR. Development of a hardened THz energy meter for use on the kilojoule-scale, short-pulse OMEGA EP laser. Rev Sci Instrum 2022; 93:123502. [PMID: 36586943 DOI: 10.1063/5.0099328] [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] [Received: 05/16/2022] [Accepted: 11/03/2022] [Indexed: 06/17/2023]
Abstract
A highly adaptable and robust terahertz (THz) energy meter is designed and implemented to detect energetic THz pulses from high-intensity (>1018 W/cm2) laser-plasma interactions on the OMEGA EP. THz radiation from the laser driven target is detected by a shielded pyrometer. A second identical pyrometer is used for background subtraction. The detector can be configured to detect THz pulses in the 1 mm to 30 μm (0.3- to 10-THz) range and pulse energies from joules to microjoules via changes in filtration, aperture size, and position. Additional polarization selective filtration can also be used to determine the THz pulse polarization. The design incorporates significant radiation and electromagnetic pulse shielding to survive and operate within the OMEGA EP radiation environment. We describe the design, operational principle, calibration, and testing of the THz energy meter. The pyrometers were calibrated using a benchtop laser and show linear sensitivity to up to 1000 nJ of absorbed energy. The initial results from four OMEGA EP THz experiments detected up to ∼15μJ at the detector, which can correspond to hundreds of mJ depending on THz emission and reflection models.
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Affiliation(s)
- G Bruhaug
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - H G Rinderknecht
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - Y E
- The Institute of Optics, University of Rochester, Rochester, New York 14627, USA
| | - M S Wei
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - R B Brannon
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - D Guy
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - R G Peck
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - N Landis
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - G Brent
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - R Fairbanks
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - C McAtee
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - T Walker
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - T Buczek
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - M Krieger
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - M H Romanofsky
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - C Milhem
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - K G Francis
- The Institute of Optics, University of Rochester, Rochester, New York 14627, USA
| | - X C Zhang
- The Institute of Optics, University of Rochester, Rochester, New York 14627, USA
| | - G W Collins
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - J R Rygg
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
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Ferrer-Torres D, Wu JH, Zhang CJ, Hammer MA, Dame MK, Wu A, Holloway EM, Karpoff K, McCarthy CL, Bohm MS, Cuttitta AJ, Tigani DJ, Huang S, Tsai YH, Miller AJ, Walker T, Bayer DE, Hogan SP, Turgeon DK, Lin J, Higgins PDR, Sexton J, Spence JR. Mapping the adult human esophagus in vivo and in vitro. Development 2022; 149:dev200614. [PMID: 36278875 PMCID: PMC9720751 DOI: 10.1242/dev.200614] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 07/20/2022] [Indexed: 10/22/2023]
Abstract
Many esophageal diseases can arise during development or throughout life. Therefore, well-characterized in vitro models and detailed methods are essential for studying human esophageal development, homeostasis and disease. Here, we (1) create an atlas of the cell types observed in the normal adult human esophagus; (2) establish an ancestrally diverse biobank of in vitro esophagus tissue to interrogate homeostasis and injury; and (3) benchmark in vitro models using the adult human esophagus atlas. We created a single-cell RNA sequencing reference atlas using fresh adult esophagus biopsies and a continuously expanding biobank of patient-derived in vitro cultures (n=55 lines). We identify and validate several transcriptionally distinct cell classes in the native human adult esophagus, with four populations belonging to the epithelial layer, including basal, epibasal, early differentiating and terminally differentiated luminal cells. Benchmarking in vitro esophagus cultures to the in vivo reference using single-cell RNA sequencing shows that the basal stem cells are robustly maintained in vitro, and the diversity of epithelial cell types in culture is dependent on cell density. We also demonstrate that cultures can be grown in 2D or as 3D organoids, and these methods can be employed for modeling the complete epithelial layers, thereby enabling in vitro modeling of the human adult esophagus.
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Affiliation(s)
- Daysha Ferrer-Torres
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Center for Cell Plasticity and Organ Design, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Joshua H. Wu
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Charles J. Zhang
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
| | - Max A. Hammer
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Michael K. Dame
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Angeline Wu
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Emily M. Holloway
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Kateryna Karpoff
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Caroline L. McCarthy
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Margaret S. Bohm
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Ashley J. Cuttitta
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Dominic J. Tigani
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Sha Huang
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Yu-Hwai Tsai
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Alyssa J. Miller
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Taylor Walker
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - David E. Bayer
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Simon P. Hogan
- Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Danielle Kim Turgeon
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Jules Lin
- Department of Thoracic Surgery, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Peter D. R. Higgins
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Jonathan Sexton
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, MI 48109, USA
- U-M Center for Drug Repurposing, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jason R. Spence
- Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Center for Cell Plasticity and Organ Design, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Department of Biomedical Engineering, University of Michigan Medical School, Ann Arbor, MI 48109, USA
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Solomon B, Sturrup R, Dixon J, Jackson K, Cruz B, Ferguson C, Walker T, Elisson R, Harris N, Bonilla J, Stiffin RM, Sherman M, Manzon A, Das S, Das M, Das JK. Abstract 5830: Carcinogenic effects of metal and metalloids through epigenetic reprogramming of human bone marrow stem cells: The bioinformatics database analysis. Cancer Res 2022. [DOI: 10.1158/1538-7445.am2022-5830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Many scientific studies showed that the carcinogenic effects of environmental contamination of several metal and metalloids on bone marrow stem cells of human body. These carcinogens include, Cadmium, Mercury, Chromium, Aluminum, Nickel and Arsenic. However, there was no such analysis for elucidating the mechanism of carcinogenic effects and epigenetic reprogramming of human bone marrow stem cells. In this study, we analyzed the carcinogenic effects of mentioned carcinogens, and the mechanism of epigenetic reprogramming using NIH Toxicology Data Network (TOXNET), Comparative Toxico-genomics Database (CTD), AACR Genomics Evidence Neoplasia Information Exchange (GENIE) database, database of Environmental Health Perspectives (EHP), National Institute of Environmental Health Sciences (NIEHS), and other bioinformatics database. We found from CTD analysis that the chemical gene interactions showed highly expressed of 272 common genes with miR140 by Cadmium, Mercury from total 3704 genes (approximately 7% affected genes). The AACR GENIE database analysis showed CDKN3, is associated with bone cancer (2 clinical data), HDAC7, TP53, MAPK3K1, MAP2K2 (8 clinical data) found among 272 genes regulated by Cadmium and Mercury. The CTD analysis showed the chemical gene interactions of highly expressed of 102 common genes with miR140 by Chromium, Mercury from a total of 1406 genes; 268 common genes with CD84, CD226 by Mercury, Nickel from a total of 5032 genes; 103 common genes with CD226 by Aluminum, Mercury from a total of 2556 genes; 248 common genes by Arsenic, Mercury from total 5508 genes. Among these 5508 genes, 248 common genes with ALDHA1, 247 common genes with CD40, 248 common genes with CD44, 247 common genes with CD423, 247 common genes with miR10A by Arsenic, Mercury from total 2556 genes. The epigenetic mechanisms of histone modifications (H3K9me3, H3K27me3, H3K27ac, H3K36me3, H3K4me1, H3K4me3 of B cells, hemopoietic stem cells, mesenchymal bone marrow, and chondrocyte stem cells and miRNAs) and these carcinogens have been revealed by the database of EHP, NIEHS, the NIH Roadmap Epigenomics Mapping Consortium, the National Center for Biotechnology Information (NCBI), and U.S. National Library of Medicine (NLM) database. Our previous study reported that the regulation of epigenetic bivalent histone modifications at transcript starts sequences (TSS) of target genes for heterogenic adult stem cells (CSCs)reprogramming and our current bioinformatics analysis revealed that TP53 is epigenetically reprogrammed with close interaction of thirteen genes by these carcinogens. Therefore, it is important to find the actual epigenetic mechanism both genomic and epigenomic transcriptional regulation and carcinogenic effects of these carcinogens on bone marrow stem cells, and our current study revealed this important relationship.
Citation Format: Benedrica Solomon, Richgena Sturrup, Jada Dixon, Kiyona Jackson, Biancaliz Cruz, Charlissia Ferguson, Taylor Walker, Ralph Elisson, Nathan Harris, Jesennia Bonilla, Rose Mary Stiffin, Marilyn Sherman, Alessandra Manzon, Swarnava Das, Madhumita Das, Jayanta Kumar Das. Carcinogenic effects of metal and metalloids through epigenetic reprogramming of human bone marrow stem cells: The bioinformatics database analysis [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 5830.
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Affiliation(s)
| | | | - Jada Dixon
- 1Florida Memorial University, Miami Gardens, FL
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Walker T. Straddling "the line" as a Health Communication Scholar: Reflexive Privilege and Positionality in International Contexts. Health Commun 2021; 36:826-828. [PMID: 31931624 DOI: 10.1080/10410236.2020.1712530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this essay, I offer an equatorial metaphor as a lens for reflexivity about positionality and privilege in field-based research. I draw on my experiences traveling and working with an international research team to reflect on my varying roles as a participant and observer. The lens of an equatorial metaphor reveals the blurred, sometimes collapsed, and ever-shifting line between insider and outsider. Reflexivity is vital, particularly in international contexts where work across differences is informed by embodied identities like race, gender, and sexuality.
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Di Capua J, Reid N, Som A, An T, Lopez D, So A, Di C, Walker T. Abstract No. 162 The effect of preprocedural renal failure on outcomes following infrainguinal endovascular arterial interventions. J Vasc Interv Radiol 2021. [DOI: 10.1016/j.jvir.2021.03.168] [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: 11/30/2022] Open
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Patel S, Shannon D, Eldridge W, El-Ters N, Hanford J, Walker T, Scheer A, Jones E, Linwood K, Aragon N, Dunscombe L, Gerbes J, Srinivasan N, Vachharajani A. Understanding umbilical venous catheter insertion practices through a prospective multicenter observational study. J Matern Fetal Neonatal Med 2021; 35:5043-5048. [PMID: 33530795 DOI: 10.1080/14767058.2021.1874908] [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: 10/22/2022]
Abstract
OBJECTIVE To understand practices of umbilical venous catheter (UVC) insertion in tertiary level neonatal intensive care units (NICU) and investigate the outcomes of subsequent attempts following a failed initial attempt. STUDY DESIGN Prospective, multi-center observational study of UVC insertions at tertiary level NICUs between March 2019 and January 2020. RESULTS Of the 101 UVCs inserted at 4 centers, seventy-two (71%) were central at the first attempt and 50% were central at subsequent attempts. Patients with at least 1 failed attempt at insertion were less likely to have a centrally placed UVC (p = .009). Manipulations were less likely to be required when UVC was centrally placed during the first attempt. Maneuvers such as posterior liver mobilization used during insertion were likely to be associated with successful central placement of UVC (p = .0243). The time to complete the procedure was significantly less when the UVC was central at the first attempt (34.2 ± 20.2 vs 46.9 ± 33.8) (p = .0292). Gestational age, birth weight, and age of the baby at the insertion of the UVC, experience of the provider, and type of catheter were comparable among groups. The Shukla formula was most commonly used by providers to measure the depth of UVC placement. CONCLUSION Repetitive attempts and manipulations were less likely to be beneficial in the successful central placement of UVC in neonates. Additionally, repetitive attempts at insertion prolonged the overall duration of the procedure.
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Affiliation(s)
- S Patel
- Department of Pediatrics, University of Illinois at Chicago, Oak Park, IL, USA
| | - D Shannon
- Department of Child Health, University of Missouri School of Medicine, Columbia, MO, USA
| | - W Eldridge
- Department of Pediatrics, Saint Joseph Women's Hospital, Tampa, FL, USA
| | - N El-Ters
- Department of Pediatrics, Washington University School of Medicine, St. Louis, MO, USA
| | - J Hanford
- Department of Child Health, University of Missouri School of Medicine, Columbia, MO, USA
| | - T Walker
- Department of Child Health, University of Missouri School of Medicine, Columbia, MO, USA
| | - A Scheer
- Department of Child Health, University of Missouri School of Medicine, Columbia, MO, USA
| | - E Jones
- Department of Child Health, University of Missouri School of Medicine, Columbia, MO, USA
| | - K Linwood
- Department of Child Health, University of Missouri School of Medicine, Columbia, MO, USA
| | - N Aragon
- Department of Child Health, University of Missouri School of Medicine, Columbia, MO, USA
| | - L Dunscombe
- Department of Child Health, University of Missouri School of Medicine, Columbia, MO, USA
| | - J Gerbes
- Department of Child Health, University of Missouri School of Medicine, Columbia, MO, USA
| | - N Srinivasan
- Department of Pediatrics, University of Illinois at Chicago, Oak Park, IL, USA
| | - A Vachharajani
- Department of Child Health, University of Missouri School of Medicine, Columbia, MO, USA
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Hossenbaccus L, Steacy L, Walker T, Malone C, Ellis A. A072 HOUSE DUST MITE ENVIRONMENTAL EXPOSURE UNIT: CLINICAL VALIDATION OF A MODEL FOR PERENNIAL ALLERGIC RHINITIS. Ann Allergy Asthma Immunol 2020. [DOI: 10.1016/j.anai.2020.08.058] [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: 11/17/2022]
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Miller AJ, Yu Q, Czerwinski M, Tsai YH, Conway RF, Wu A, Holloway EM, Walker T, Glass IA, Treutlein B, Camp JG, Spence JR. In Vitro and In Vivo Development of the Human Airway at Single-Cell Resolution. Dev Cell 2020; 54:818. [PMID: 32991836 PMCID: PMC7540720 DOI: 10.1016/j.devcel.2020.09.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Walker T, Mitchell P, Dlouhy S. Cultivating Passion through Collaborative Art: A Dialogic Exploration of Disability, Storytelling, and Social Change. Health Commun 2020; 35:917-920. [PMID: 30947540 DOI: 10.1080/10410236.2019.1596868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This essay explores the role of art and storytelling in organizing expressive and vocational opportunities for individuals with developmental disabilities. Passion Works is a non-profit organization that fosters collaborative art-making among people with differing abilities. Guided by an asset-based approach titled the Creative Abundance Model, the studio challenges deficit-based narratives that guide traditional programming in sheltered workshops for individuals with developmental disabilities. The studio functions as an incubator of discovery, a process central to fostering individual well-being and social change.
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Miller AJ, Yu Q, Czerwinski M, Tsai YH, Conway RF, Wu A, Holloway EM, Walker T, Glass IA, Treutlein B, Camp JG, Spence JR. In Vitro and In Vivo Development of the Human Airway at Single-Cell Resolution. Dev Cell 2020; 53:117-128.e6. [PMID: 32109386 PMCID: PMC7396815 DOI: 10.1016/j.devcel.2020.01.033] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 12/09/2019] [Accepted: 01/28/2020] [Indexed: 12/13/2022]
Abstract
Bud tip progenitor cells give rise to all murine lung epithelial lineages and have been described in the developing human lung; however, the mechanisms controlling human bud tip differentiation into specific lineages are unclear. Here, we used homogeneous human bud tip organoid cultures and identified SMAD signaling as a key regulator of the bud tip-to-airway transition. SMAD induction led to the differentiation of airway-like organoids possessing functional basal cells capable of clonal expansion and multilineage differentiation. To benchmark in vitro-derived organoids, we developed a single-cell mRNA sequencing atlas of the human lung from 11.5 to 21 weeks of development, which revealed high degrees of similarity between the in vitro-derived and in vivo airway. Together, this work sheds light on human airway differentiation in vitro and provides a single-cell atlas of the developing human lung.
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Affiliation(s)
- Alyssa J Miller
- Program in Cell and Molecular Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Department of Internal Medicine, Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Qianhui Yu
- Institute of Molecular and Clinical Ophthalmology Basel (IOB), Basel, Switzerland; University of Basel, Basel, Switzerland; Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Michael Czerwinski
- Department of Internal Medicine, Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Center for Organogenesis, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Yu-Hwai Tsai
- Department of Internal Medicine, Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Renee F Conway
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Angeline Wu
- Department of Internal Medicine, Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Emily M Holloway
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Taylor Walker
- Department of Internal Medicine, Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Ian A Glass
- Department of Pediatrics, Genetic Medicine, University of Washington, Seattle, WA 98195, USA
| | - Barbara Treutlein
- Department of Biosystems Science and Engineering, ETH Zürich, Basel, Switzerland; Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany.
| | - J Gray Camp
- Institute of Molecular and Clinical Ophthalmology Basel (IOB), Basel, Switzerland; University of Basel, Basel, Switzerland; Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany.
| | - Jason R Spence
- Program in Cell and Molecular Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Department of Internal Medicine, Gastroenterology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Center for Organogenesis, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Department of Biomedical Engineering, University of Michigan College of Engineering, Ann Arbor, MI 48109, USA.
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Abstract
IntroductionThe number of novel psychoactive substances (NPS) available is increasing. Synthetic cannabinoids (SC) are one of many NPS sold. SC aim to emulate the effects of natural cannabis by acting on cannabinoid receptors. Despite much research into pharmacology, there is limited data on the user experience of SC.AimIt is useful for psychiatrists, to understand what experiences people have whilst on illicit substances. The aim of this qualitative study is to gain an initial understanding of what characterizes the experiences of those who use SC.MethodFourty anonymously written online reports were collected from the “Erowid experience vaults” and analysed using the Empirical Phenomenological Psychological Method.ResultsThe analysis yielded 488 meaning units (MU). These were grouped into 36 categories revealing 5 broad themes: (1) physical affects; (2) sensory distortions and distortions of perception; (3) emotional and psychological effects; (4) re-dosing, addiction and comedown effects; (5) similarities to other substances.ConclusionSynthetic cannabinoids have a mixed effect on users with a myriad of experiences reported. Some experienced positive results from their usage such as euphoria and relaxation, however these were counter balanced by those who experienced some serious negative emotional and physical side effects such as anxiety, paranoia, palpitations and convulsions. SC appear to often emulate that of their natural counterpart, yet there is an unpredictability to them which can end with serious consequences. Online forum content gives us a strong base understanding of users experiences of SC. Further research is required to elucidate a more nuanced understanding.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Zdora MC, Zanette I, Walker T, Phillips NW, Smith R, Deyhle H, Ahmed S, Thibault P. X-ray phase imaging with the unified modulated pattern analysis of near-field speckles at a laboratory source. Appl Opt 2020; 59:2270-2275. [PMID: 32225757 DOI: 10.1364/ao.384531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 01/30/2020] [Indexed: 06/10/2023]
Abstract
X-ray phase-contrast techniques are powerful methods for discerning features with similar densities, which are normally indistinguishable with conventional absorption contrast. While these techniques are well-established tools at large-scale synchrotron facilities, efforts have increasingly focused on implementations at laboratory sources for widespread use. X-ray speckle-based imaging is one of the phase-contrast techniques with high potential for translation to conventional x-ray systems. It yields phase-contrast, transmission, and dark-field images with high sensitivity using a relatively simple and cost-effective setup tolerant to divergent and polychromatic beams. Recently, we have introduced the unified modulated pattern analysis (UMPA) [Phys. Rev. Lett.118, 203903 (2017)PRLTAO0031-900710.1103/PhysRevLett.118.203903], which further simplifies the translation of x-ray speckle-based imaging to low-brilliance sources. Here, we present the proof-of-principle implementation of UMPA speckle-based imaging at a microfocus liquid-metal-jet x-ray laboratory source.
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Di Capua J, Di Capua C, Grenier R, Lopez D, Walker T. 3:54 PM Abstract No. 314 The effect of age as a postoperative risk factor following lower extremity endovascular arterial interventions. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Harter LM, Ellingson LL, Yamasaki J, Hook C, Walker T. Defining Moments…Telling Stories to Foster Well-being, Humanize Healthcare, and Advocate for Change. Health Commun 2020; 35:262-267. [PMID: 30541344 DOI: 10.1080/10410236.2018.1557468] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Health Communication launched the "Defining Moments" forum in 2009 to showcase the social and material power of storytelling. On its 10-year anniversary, we take stock of how authors have enacted "Defining Moments" including what was narrated, by whom, and why. In eight loosely coupled thematic clusters, we revisit the more than 75 published essays to date, finding value in ways that speak to the emerging and enduring issues of concern for health communication scholars. Across the essays, the maturation of health narrative theorizing is revealed by the sheer scope of topics addressed, coupled with the expanded voices and ways of voicing experience. Collectively, these essays have enlarged academic conventions and offered diverse entry points for refiguring the experience of illness and well-being.
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Affiliation(s)
| | - Laura L Ellingson
- Departments of Communication and Women's & Gender Studies, Santa Clara University
| | - Jill Yamasaki
- Jack J. Valenti School of Communication, University of Houston
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18
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Mawer D, Byrne F, Drake S, Brown C, Prescott A, Warne B, Bousfield R, Skittrall JP, Ramsay I, Somasunderam D, Bevan M, Coslett J, Rao J, Stanley P, Kennedy A, Dobson R, Long S, Obisanya T, Esmailji T, Petridou C, Saeed K, Brechany K, Davis-Blue K, O'Horan H, Wake B, Martin J, Featherstone J, Hall C, Allen J, Johnson G, Hornigold C, Amir N, Henderson K, McClements C, Liew I, Deshpande A, Vink E, Trigg D, Guilfoyle J, Scarborough M, Scarborough C, Wong THN, Walker T, Fawcett N, Morris G, Tomlin K, Grix C, O'Cofaigh E, McCaffrey D, Cooper M, Corbett K, French K, Harper S, Hayward C, Reid M, Whatley V, Winfield J, Hoque S, Kelly L, King I, Bradley A, McCullagh B, Hibberd C, Merron M, McCabe C, Horridge S, Taylor J, Koo S, Elsanousi F, Saunders R, Lim F, Bond A, Stone S, Milligan ID, Mack DJF, Nagar A, West RM, Wilcox MH, Kirby A, Sandoe JAT. Cross-sectional study of the prevalence, causes and management of hospital-onset diarrhoea. J Hosp Infect 2019; 103:200-209. [PMID: 31077777 DOI: 10.1016/j.jhin.2019.05.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 05/01/2019] [Indexed: 11/25/2022]
Abstract
BACKGROUND The National Health Service in England advises hospitals collect data on hospital-onset diarrhoea (HOD). Contemporaneous data on HOD are lacking. AIM To investigate prevalence, aetiology and management of HOD on medical, surgical and elderly-care wards. METHODS A cross-sectional study in a volunteer sample of UK hospitals, which collected data on one winter and one summer day in 2016. Patients admitted ≥72 h were screened for HOD (definition: ≥2 episodes of Bristol Stool Type 5-7 the day before the study, with diarrhoea onset >48 h after admission). Data on HOD aetiology and management were collected prospectively. FINDINGS Data were collected on 141 wards in 32 hospitals (16 acute, 16 teaching). Point-prevalence of HOD was 4.5% (230/5142 patients; 95% confidence interval (CI) 3.9-5.0%). Teaching hospital HOD prevalence (5.9%, 95% CI 5.1-6.9%) was twice that of acute hospitals (2.8%, 95% CI 2.1-3.5%; odds ratio 2.2, 95% CI 1.7-3.0). At least one potential cause was identified in 222/230 patients (97%): 107 (47%) had a relevant underlying condition, 125 (54%) were taking antimicrobials, and 195 (85%) other medication known to cause diarrhoea. Nine of 75 tested patients were Clostridium difficile toxin positive (4%). Eighty (35%) patients had a documented medical assessment of diarrhoea. Documentation of HOD in medical notes correlated with testing for C. difficile (78% of those tested vs 38% not tested, P<0.001). One-hundred and forty-four (63%) patients were not isolated following diarrhoea onset. CONCLUSION HOD is a prevalent symptom affecting thousands of patients across the UK health system each day. Most patients had multiple potential causes of HOD, mainly iatrogenic, but only a third had medical assessment. Most were not tested for C. difficile and were not isolated.
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Affiliation(s)
- D Mawer
- Department of Microbiology, Leeds Teaching Hospitals NHS Trust, Leeds, LS9 7TF, UK.
| | - F Byrne
- Department of Microbiology, Leeds Teaching Hospitals NHS Trust, Leeds, LS9 7TF, UK
| | - S Drake
- Department of Microbiology, Leeds Teaching Hospitals NHS Trust, Leeds, LS9 7TF, UK
| | - C Brown
- Department of Microbiology, Leeds Teaching Hospitals NHS Trust, Leeds, LS9 7TF, UK
| | - A Prescott
- Department of Microbiology, Leeds Teaching Hospitals NHS Trust, Leeds, LS9 7TF, UK
| | - B Warne
- Department of Infectious Diseases, Cambridge University Hospitals NHS Foundation Trust, Cambridge, CB2 0QQ, UK
| | - R Bousfield
- Department of Infectious Diseases, Cambridge University Hospitals NHS Foundation Trust, Cambridge, CB2 0QQ, UK
| | - J P Skittrall
- Royal Papworth Hospital NHS Foundation Trust, Papworth Everard, Cambridge, CB23 3RE, UK
| | - I Ramsay
- Department of Infectious Diseases, Cambridge University Hospitals NHS Foundation Trust, Cambridge, CB2 0QQ, UK
| | - D Somasunderam
- Department of Infectious Diseases, Cambridge University Hospitals NHS Foundation Trust, Cambridge, CB2 0QQ, UK
| | - M Bevan
- Department of Infection Prevention, Royal Gwent Hospital, Newport, NP20 2UB, UK
| | - J Coslett
- Department of Infection Prevention, Royal Gwent Hospital, Newport, NP20 2UB, UK
| | - J Rao
- Department of Microbiology, Barnsley Hospital NHS Foundation Trust, Barnsley, S75 2EP, UK
| | - P Stanley
- Infection Prevention and Control, Bradford Teaching Hospitals NHS Foundation Trust, Bradford, BD9 6RJ, UK
| | - A Kennedy
- Infection Prevention and Control, Bradford Teaching Hospitals NHS Foundation Trust, Bradford, BD9 6RJ, UK
| | - R Dobson
- Infection Prevention and Control, Bradford Teaching Hospitals NHS Foundation Trust, Bradford, BD9 6RJ, UK
| | - S Long
- Department of Microbiology, East Lancashire Hospitals NHS Trust, Blackburn, BB2 3HH, UK
| | - T Obisanya
- Department of Microbiology, East Lancashire Hospitals NHS Trust, Blackburn, BB2 3HH, UK
| | - T Esmailji
- Department of Microbiology, East Lancashire Hospitals NHS Trust, Blackburn, BB2 3HH, UK
| | - C Petridou
- Department of Microbiology, Hampshire Hospitals NHS Foundation Trust, Winchester, SO22 5DG, UK
| | - K Saeed
- Department of Microbiology, Hampshire Hospitals NHS Foundation Trust, Winchester, SO22 5DG, UK
| | - K Brechany
- Department of Microbiology, Hampshire Hospitals NHS Foundation Trust, Winchester, SO22 5DG, UK
| | - K Davis-Blue
- Department of Microbiology, Hampshire Hospitals NHS Foundation Trust, Winchester, SO22 5DG, UK
| | - H O'Horan
- Department of Microbiology, Hampshire Hospitals NHS Foundation Trust, Winchester, SO22 5DG, UK
| | - B Wake
- Department of Microbiology, Hampshire Hospitals NHS Foundation Trust, Winchester, SO22 5DG, UK
| | - J Martin
- Department of Microbiology, Harrogate and District NHS Foundation Trust, Harrogate, HG2 7SX, UK
| | - J Featherstone
- Department of Microbiology, Harrogate and District NHS Foundation Trust, Harrogate, HG2 7SX, UK
| | - C Hall
- Department of Infectious Diseases, Hull and East Yorkshire Hospitals NHS Trust, Hull, HU3 2JZ, UK
| | - J Allen
- Department of Infectious Diseases, Hull and East Yorkshire Hospitals NHS Trust, Hull, HU3 2JZ, UK
| | - G Johnson
- Department of Infectious Diseases, Hull and East Yorkshire Hospitals NHS Trust, Hull, HU3 2JZ, UK
| | - C Hornigold
- Department of Infectious Diseases, Hull and East Yorkshire Hospitals NHS Trust, Hull, HU3 2JZ, UK
| | - N Amir
- Department of Microbiology, Mid Yorkshire Hospitals NHS Trust, Wakefield, WF1 4DG, UK
| | - K Henderson
- Inverclyde Royal Hospital, Greenock, PA16 0XN, UK
| | - C McClements
- Inverclyde Royal Hospital, Greenock, PA16 0XN, UK
| | - I Liew
- Inverclyde Royal Hospital, Greenock, PA16 0XN, UK
| | - A Deshpande
- Department of Microbiology, Inverclyde Royal Hospital, Greenock, PA16 0XN, UK
| | - E Vink
- Department of Microbiology, Royal Infirmary of Edinburgh, Edinburgh, EH16 4SA, UK
| | - D Trigg
- Department of Infection Prevention & Control, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - J Guilfoyle
- Department of Infection Prevention & Control, Nottingham University Hospitals NHS Trust, Nottingham, NG7 2UH, UK
| | - M Scarborough
- Department of Infectious Diseases, Oxford University Hospitals NHS Trust, Oxford, OX3 9DU, UK
| | - C Scarborough
- Nuffield Department of Medicine, University of Oxford, OX3 7FZ, UK
| | - T H N Wong
- Department of Infectious Diseases, Oxford University Hospitals NHS Trust, Oxford, OX3 9DU, UK
| | - T Walker
- Department of Infectious Diseases, Oxford University Hospitals NHS Trust, Oxford, OX3 9DU, UK
| | - N Fawcett
- Department of Medicine, Oxford University Hospitals NHS Trust, Oxford, OX3 9DU, UK
| | - G Morris
- Department of Microbiology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, S10 2JF, UK
| | - K Tomlin
- Department of Infection Prevention & Control, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, S10 2JF, UK
| | - C Grix
- Department of Infection Prevention & Control, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, S10 2JF, UK
| | - E O'Cofaigh
- Department of Medicine, Friarage Hospital, South Tees Hospital NHS Foundation Trust, Northallerton, DL6 1JG, UK
| | - D McCaffrey
- Department of Infection Prevention & Control, James Cook University Hospital, South Tees Hospital NHS Foundation Trust, Middlesborough, TS4 3BW, UK
| | - M Cooper
- Department of Microbiology, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - K Corbett
- Department of Infection Prevention & Control, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - K French
- Department of Microbiology, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - S Harper
- Department of Infection Prevention & Control, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - C Hayward
- Department of Infection Prevention & Control, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - M Reid
- Department of Infection Prevention & Control, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - V Whatley
- Corporate Support Services, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - J Winfield
- Department of Infection Prevention & Control, The Royal Wolverhampton NHS Trust, Wolverhampton, WV10 0QP, UK
| | - S Hoque
- Department of Microbiology, Torbay and South Devon Healthcare NHS Foundation Trust, Torquay, TQ2 7AA, UK
| | - L Kelly
- Department of Infection Prevention & Control, Torbay and South Devon Healthcare NHS Foundation Trust, Torquay, TQ2 7AA, UK
| | - I King
- Department of Infection Prevention & Control, Ulster Hospital, South Eastern Health and Social Care Trust, Belfast, BT16 1RH, UK
| | - A Bradley
- Department of Infection Prevention & Control, Ulster Hospital, South Eastern Health and Social Care Trust, Belfast, BT16 1RH, UK
| | - B McCullagh
- Pharmacy Department, Ulster Hospital, South Eastern Health and Social Care Trust, Belfast, BT16 1RH, UK
| | - C Hibberd
- Pharmacy Department, Ulster Hospital, South Eastern Health and Social Care Trust, Belfast, BT16 1RH, UK
| | - M Merron
- Department of Infection Prevention & Control, Ulster Hospital, South Eastern Health and Social Care Trust, Belfast, BT16 1RH, UK
| | - C McCabe
- Department of Infection Prevention & Control, Ulster Hospital, South Eastern Health and Social Care Trust, Belfast, BT16 1RH, UK
| | - S Horridge
- Department of Microbiology, University Hospital Coventry, University Hospitals of Coventry and Warwickshire, Warwick, CV2 2DX, UK
| | - J Taylor
- Department of Virology and Molecular Pathology, University Hospital Coventry, University Hospitals of Coventry and Warwickshire, Warwick, CV2 2DX, UK
| | - S Koo
- Department of Microbiology, University Hospitals of Leicester NHS Trust, Leicester, LE1 5WW, UK
| | - F Elsanousi
- Department of Microbiology, University Hospitals of Leicester NHS Trust, Leicester, LE1 5WW, UK
| | - R Saunders
- Department of Microbiology, University Hospitals of Leicester NHS Trust, Leicester, LE1 5WW, UK
| | - F Lim
- Department of Microbiology, University Hospitals of Leicester NHS Trust, Leicester, LE1 5WW, UK
| | - A Bond
- Department of Microbiology, York Teaching Hospital NHS Foundation Trust, York, YO31 8HE, UK
| | - S Stone
- Royal Free Campus, University College Medical School, London, NW3 2QG, UK
| | - I D Milligan
- Department of Microbiology, Royal Free Hospital, University College London Hospitals NHS Foundation Trust, London, NW3 2QG, UK
| | - D J F Mack
- Department of Microbiology, Royal Free Hospital, University College London Hospitals NHS Foundation Trust, London, NW3 2QG, UK
| | - A Nagar
- Department of Microbiology, Antrim Area Hospital, Northern Health and Social Care Trust, Bush Road, Antrim, BT41 2RL, UK
| | - R M West
- Leeds Institute of Health Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - M H Wilcox
- Leeds Institute of Biomedical and Clinical Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - A Kirby
- Leeds Institute of Medical Research, University of Leeds, Leeds, LS2 9JT, UK
| | - J A T Sandoe
- Leeds Institute of Medical Research, University of Leeds, Leeds, LS2 9JT, UK
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Stewart P, Stewart J, Walker T, Gullapudi VRL, Selby NM, Taal MW. SP541MEASURING PRESSURE WAVES IN DIALYSIS LINES TO DERIVE CONTINUOUS ARTERIAL BLOOD PRESSURE: PILOT WORK IN AN IN VITRO AND IN SILICO MODEL. Nephrol Dial Transplant 2019. [DOI: 10.1093/ndt/gfz103.sp541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | | | - T Walker
- University of Derby, Derby, United Kingdom
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Stewart P, Stewart J, Walker T, Gullapudi VRL, Taal MW, Selby NM. FP630DEVELOPMENT OF AN IN VITRO SIMULATION MODEL TO INVESTIGATE HAEMODYNAMIC RESPONSES DURING HAEMODIALYSIS. Nephrol Dial Transplant 2019. [DOI: 10.1093/ndt/gfz106.fp630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | | | - T Walker
- University of Derby, Derby, United Kingdom
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Gullapudi VRL, Stewart J, Stewart P, Walker T, Eldehni TE, Taal MW, Selby NM. FP638FREQUENCY ANALYSIS REVEALS UNIQUE HAEMODYNAMIC RESPONSES TO HAEMODIALYSIS: BASELINE RESULTS FROM THE ITREND STUDY. Nephrol Dial Transplant 2019. [DOI: 10.1093/ndt/gfz106.fp638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | | | | | - T Walker
- University of Derby, Derby, United Kingdom
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Walker T, Kelly R, Frezzini C, Cereceda-Monteoliva N, Clark R, Cobb A, Ayliffe P. The rose trellis mucoperiosteal scoring technique improves flap stretch for alveolar cleft and oro antral fistula repair. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Walker T, Frezzini C, Wu E, Haria N, Sahjir G, Cobb A. Cleft LIP & palate and photosharing social media platforms (instagram). Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Walker T, Clark R, Deacon S, Revington P. Factors affecting success in the management of the alveolar cleft - a review of 304 tibial bone grafts in a single institution. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Walker T, Rutkowski L, Innmann M, Panzram B, Herre J, Gotterbarm T, Aldinger PR, Merle C. Unicondylar knee arthroplasty using cobalt-chromium implants in patients with self-reported cutaneous metal hypersensitivity. Bone Joint J 2019; 101-B:227-232. [DOI: 10.1302/0301-620x.101b2.bjj-2018-0778.r1] [Citation(s) in RCA: 13] [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: 12/15/2022]
Abstract
Aims The treatment of patients with allergies to metal in total joint arthroplasty is an ongoing debate. Possibilities include the use of hypoallergenic prostheses, as well as the use of standard cobalt-chromium (CoCr) alloy. This non-designer study was performed to evaluate the clinical outcome and survival rates of unicondylar knee arthroplasty (UKA) using a standard CoCr alloy in patients reporting signs of a hypersensitivity to metal. Patients and Methods A consecutive series of patients suitable for UKA were screened for symptoms of metal hypersensitivity by use of a questionnaire. A total of 82 patients out of 1737 patients suitable for medial UKA reporting cutaneous metal hypersensitivity to cobalt, chromium, or nickel were included into this study and prospectively evaluated to determine the functional outcome, possible signs of hypersensitivity, and short-term survivorship at a minimum follow-up of 1.5 years. Results At a mean follow-up of three years (1.5 to 5.7), no local or systemic symptoms of hypersensitivity to metal were observed. One patient underwent revision surgery to a bicondylar prosthesis due to a tibial periprosthetic fracture resulting in a survival rate of 98.8% (95% confidence interval (CI) 91.7 to 99.8; number at risk, 28) at three years with the endpoint of revision for any reason and a survival rate of 97.6% (95% CI 90.6 to 99.3; number at risk, 29) for the endpoint of all reoperations. Clinical outcome was good to excellent with a mean Oxford Knee Score of 42.5 (sd 2.5; 37 to 48). Conclusion This study is the first demonstrating clinical results and survival analysis of UKA using a CoCr alloy in patients with a history of metal hypersensitivity. Functional outcome and survivorship are on a high-level equivalent to those reported for UKA in patients without a history of metal hypersensitivity. No serious local or systemic symptoms of metal hypersensitivity could be detected, and no revision surgery was performed due to an adverse reaction to metal ions.
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Affiliation(s)
- T. Walker
- Center for Orthopaedic and Trauma Surgery, University of Heidelberg, Heidelberg, Germany
| | - L. Rutkowski
- Department of Orthopaedic Surgery, Diakonie Clinic Paulinenhilfe, Stuttgart, Germany
| | - M. Innmann
- Center for Orthopaedic and Trauma Surgery, University of Heidelberg, Heidelberg, Germany
| | - B. Panzram
- Center for Orthopaedic and Trauma Surgery, University of Heidelberg, Heidelberg, Germany
| | - J. Herre
- Department of Orthopaedic Surgery, Diakonie Clinic Paulinenhilfe, Stuttgart, Germany
| | - T. Gotterbarm
- Head of Center for Orthopaedic and Trauma Surgery, University of Linz, Linz, Austria
| | - P. R. Aldinger
- Head of Department of Orthopaedic Surgery, Diakonie Clinic Paulinenhilfe, Stuttgart, Germany
| | - C. Merle
- Center for Orthopaedic and Trauma Surgery, University of Heidelberg, Heidelberg, Germany
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Jamil K, Walker T, Onikul E, Munns CF, Little DG. A comparison of subtraction MRI with the standard contrast-enhanced imaging in Perthes' disease. J Child Orthop 2019; 13:82-88. [PMID: 30838080 PMCID: PMC6376440 DOI: 10.1302/1863-2548.13.180136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 12/19/2018] [Indexed: 02/03/2023] Open
Abstract
PURPOSE Perthes' disease (PD) results from loss of blood supply to the hip and can progress to femoral head deformity. MRI in the early course of the disease can provide data on the initial extent of infarct. Vascularity of the femoral head is assessed by gadolinium-enhanced MRI (contrast MRI), which may be improved by the digital subtraction technique (subtraction MRI). We hypothesized that gadolinium-enhanced MRI without subtraction was comparable with subtraction MRI in depicting the femoral head perfusion. METHODS In all, 34 patients (34 hips) with unilateral PD had gadolinium-enhanced MRI as part of a prospectively randomized study. Nine patients had three MRIs, 15 had two and ten had a single MRI. Measurement of perfusion of the femoral head (MRI perfusion index) was obtained using digital image analysis on all the MRIs, including both before and after subtraction. A paired sample t-test was performed to compare the measurements. RESULTS The mean age of the patients was 8.9 years (sd 1.6). At the time of diagnosis, the subtraction MRI did not elicit a statistically significant difference in MRI perfusion index measurements when compared with the contrast MRI (p = 0.19). The same findings were found when including all patients at various stages of the disease (p = 0.30). Qualitatively, although some subtraction MRI images showed superior delineation of epiphysis, there are no significant differences throughout the whole series. CONCLUSION Although the current literature supports the increasing role of the subtraction MRI for PD management, our study proposed that the contrast MRI without subtraction technique appears adequate in assessing femoral head perfusion. LEVEL OF EVIDENCE Level I - Diagnostic study.
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Affiliation(s)
- K. Jamil
- Discipline of Child and Adolescent Health, The Children’s Hospital at Westmead Clinical School, University of Sydney, Sydney, NSW, Australia
- Orthopaedic Research and Biotechnology, The Children’s Hospital at Westmead, Westmead NSW, Australia
- Medical Faculty, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - T. Walker
- Discipline of Medical Imaging, The Children’s Hospital at Westmead, Sydney, Australia
| | - E. Onikul
- Discipline of Medical Imaging, The Children’s Hospital at Westmead, Sydney, Australia
| | - C. F. Munns
- Discipline of Child and Adolescent Health, The Children’s Hospital at Westmead Clinical School, University of Sydney, Sydney, NSW, Australia
- Institute of Endocrinology and Diabetes, The Children’s Hospital at Westmead, Westmead NSW, Australia
| | - D. G. Little
- Discipline of Child and Adolescent Health, The Children’s Hospital at Westmead Clinical School, University of Sydney, Sydney, NSW, Australia
- Orthopaedic Research and Biotechnology, The Children’s Hospital at Westmead, Westmead NSW, Australia
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Miyazaki K, Sekiya T, Fu D, Bowman KW, Kulawik SS, Sudo K, Walker T, Kanaya Y, Takigawa M, Ogochi K, Eskes H, Boersma KF, Thompson AM, Gaubert B, Barre J, Emmons LK. Balance of Emission and Dynamical Controls on Ozone During the Korea-United States Air Quality Campaign From Multiconstituent Satellite Data Assimilation. J Geophys Res Atmos 2019; 124:387-413. [PMID: 31007989 PMCID: PMC6472638 DOI: 10.1029/2018jd028912] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 10/29/2018] [Accepted: 11/06/2018] [Indexed: 05/05/2023]
Abstract
Global multiconstituent concentration and emission fields obtained from the assimilation of the satellite retrievals of ozone, CO, NO2, HNO3, and SO2 from the Ozone Monitoring Instrument (OMI), Global Ozone Monitoring Experiment 2, Measurements of Pollution in the Troposphere, Microwave Limb Sounder, and Atmospheric Infrared Sounder (AIRS)/OMI are used to understand the processes controlling air pollution during the Korea-United States Air Quality (KORUS-AQ) campaign. Estimated emissions in South Korea were 0.42 Tg N for NO x and 1.1 Tg CO for CO, which were 40% and 83% higher, respectively, than the a priori bottom-up inventories, and increased mean ozone concentration by up to 7.5 ± 1.6 ppbv. The observed boundary layer ozone exceeded 90 ppbv over Seoul under stagnant phases, whereas it was approximately 60 ppbv during dynamical conditions given equivalent emissions. Chemical reanalysis showed that mean ozone concentration was persistently higher over Seoul (75.10 ± 7.6 ppbv) than the broader KORUS-AQ domain (70.5 ± 9.2 ppbv) at 700 hPa. Large bias reductions (>75%) in the free tropospheric OH show that multiple-species assimilation is critical for balanced tropospheric chemistry analysis and emissions. The assimilation performance was dependent on the particular phase. While the evaluation of data assimilation fields shows an improved agreement with aircraft measurements in ozone (to less than 5 ppbv biases), CO, NO2, SO2, PAN, and OH profiles, lower tropospheric ozone analysis error was largest at stagnant conditions, whereas the model errors were mostly removed by data assimilation under dynamic weather conditions. Assimilation of new AIRS/OMI ozone profiles allowed for additional error reductions, especially under dynamic weather conditions. Our results show the important balance of dynamics and emissions both on pollution and the chemical assimilation system performance.
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Affiliation(s)
- K. Miyazaki
- Japan Agency for Marine‐Earth Science and TechnologyYokohamaJapan
| | - T. Sekiya
- Japan Agency for Marine‐Earth Science and TechnologyYokohamaJapan
| | - D. Fu
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
| | - K. W. Bowman
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
| | - S. S. Kulawik
- Bay Area Environmental Research InstituteSonomaCAUSA
| | - K. Sudo
- Japan Agency for Marine‐Earth Science and TechnologyYokohamaJapan
- Graduate School of Environmental StudiesNagoya UniversityNagoyaJapan
| | - T. Walker
- Department of Civil and Environmental EngineeringCarleton UniversityOttawaOntarioCanada
| | - Y. Kanaya
- Japan Agency for Marine‐Earth Science and TechnologyYokohamaJapan
| | - M. Takigawa
- Japan Agency for Marine‐Earth Science and TechnologyYokohamaJapan
| | - K. Ogochi
- Japan Agency for Marine‐Earth Science and TechnologyYokohamaJapan
| | - H. Eskes
- Royal Netherlands Meteorological Institute (KNMI)De BiltNetherlands
| | - K. F. Boersma
- Royal Netherlands Meteorological Institute (KNMI)De BiltNetherlands
- Meteorological and Air Quality DepartmentWageningen UniversityWageningenNetherlands
| | | | - B. Gaubert
- Atmospheric Chemistry Observations and& Modeling (ACOM) LaboratoryNational Center for Atmospheric ResearchBoulderCOUSA
| | - J. Barre
- European Centre for Medium‐Range Weather ForecastsReadingUK
| | - L. K. Emmons
- Atmospheric Chemistry Observations and& Modeling (ACOM) LaboratoryNational Center for Atmospheric ResearchBoulderCOUSA
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Patzelt J, Ulrich M, Magunia HF, Sauter R, Droppa M, Jorbenadze R, Becker AS, Walker T, Von Bardeleben RS, Grasshoff C, Rosenberger P, Gawaz M, Seizer P, Langer HF. P2575Comparison of deep sedation with general anesthesia in patients undergoing percutaneous mitral valve repair (PMVR). Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- J Patzelt
- university hospital, department of cardiology and cardiovascular medicine, Tuebingen, Germany
| | - M Ulrich
- university hospital, department of cardiology and cardiovascular medicine, Tuebingen, Germany
| | - H F Magunia
- university hospital, department of anaesthesiology and intensive care medicine, Tuebingen, Germany
| | - R Sauter
- university hospital, department of cardiology and cardiovascular medicine, Tuebingen, Germany
| | - M Droppa
- university hospital, department of cardiology and cardiovascular medicine, Tuebingen, Germany
| | - R Jorbenadze
- university hospital, department of cardiology and cardiovascular medicine, Tuebingen, Germany
| | - A S Becker
- university hospital, department of cardiology and cardiovascular medicine, Tuebingen, Germany
| | - T Walker
- university hospital, department of cardiovascular surgery, Tuebingen, Germany
| | - R S Von Bardeleben
- University Hospital, Johannes Gutenberg-University, Cardiology, Mainz, Germany
| | - C Grasshoff
- university hospital, department of anaesthesiology and intensive care medicine, Tuebingen, Germany
| | - P Rosenberger
- university hospital, department of anaesthesiology and intensive care medicine, Tuebingen, Germany
| | - M Gawaz
- university hospital, department of cardiology and cardiovascular medicine, Tuebingen, Germany
| | - P Seizer
- university hospital, department of cardiology and cardiovascular medicine, Tuebingen, Germany
| | - H F Langer
- university hospital, department of cardiology and cardiovascular medicine, Tuebingen, Germany
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Brugman VA, Kristan M, Gibbins MP, Angrisano F, Sala KA, Dessens JT, Blagborough AM, Walker T. Detection of malaria sporozoites expelled during mosquito sugar feeding. Sci Rep 2018; 8:7545. [PMID: 29765136 PMCID: PMC5954146 DOI: 10.1038/s41598-018-26010-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 05/03/2018] [Indexed: 12/17/2022] Open
Abstract
Malaria is a severe disease of global importance transmitted by mosquitoes of the genus Anopheles. The ability to rapidly detect the presence of infectious mosquitoes able to transmit malaria is of vital importance for surveillance, control and elimination efforts. Current methods principally rely on large-scale mosquito collections followed by labour-intensive salivary gland dissections or enzyme-linked immunosorbent (ELISA) methods to detect sporozoites. Using forced salivation, we demonstrate here that Anopheles mosquitoes infected with Plasmodium expel sporozoites during sugar feeding. Expelled sporozoites can be detected on two sugar-soaked substrates, cotton wool and Whatman FTA cards, and sporozoite DNA is detectable using real-time PCR. These results demonstrate a simple and rapid methodology for detecting the presence of infectious mosquitoes with sporozoites and highlight potential laboratory applications for investigating mosquito-malaria interactions. Our results indicate that FTA cards could be used as a simple, effective and economical tool in enhancing field surveillance activities for malaria.
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Affiliation(s)
- V A Brugman
- Department of Disease Control, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK.
- Evolution Biotechnologies, Colworth Science Park, Sharnbrook, Bedford, MK44 1LZ, UK.
| | - M Kristan
- Department of Disease Control, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - M P Gibbins
- Department of Immunology and Infection, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - F Angrisano
- Department of Life Sciences, Sir Alexander Fleming Building, Imperial College London, Imperial College Road, South Kensington, London, SW7 2AZ, UK
| | - K A Sala
- Department of Life Sciences, Sir Alexander Fleming Building, Imperial College London, Imperial College Road, South Kensington, London, SW7 2AZ, UK
| | - J T Dessens
- Department of Pathogen Molecular Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - A M Blagborough
- Department of Life Sciences, Sir Alexander Fleming Building, Imperial College London, Imperial College Road, South Kensington, London, SW7 2AZ, UK
| | - T Walker
- Department of Disease Control, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
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Walker T, Zahn N, Bruckner T, Streit MR, Mohr G, Aldinger PR, Clarius M, Gotterbarm T. Mid-term results of lateral unicondylar mobile bearing knee arthroplasty: a multicentre study of 363 cases. Bone Joint J 2018; 100-B:42-49. [PMID: 29305449 DOI: 10.1302/0301-620x.100b1.bjj-2017-0600.r1] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [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: 12/12/2022]
Abstract
AIMS The aim of this independent multicentre study was to assess the mid-term results of mobile bearing unicondylar knee arthroplasty (UKA) for isolated lateral osteoarthritis of the knee joint. PATIENTS AND METHODS We retrospectively evaluated 363 consecutive, lateral UKAs (346 patients) performed using the Oxford domed lateral prosthesis undertaken in three high-volume knee arthroplasty centres between 2006 and 2014. Mean age of the patients at surgery was 65 years (36 to 88) with a mean final follow-up of 37 months (12 to 93) RESULTS: A total of 36 (10.5%) patients underwent revision surgery, giving a survival rate of 90.1% at three years (95% confidence intervals (CI) 86.1 to 93.1; number at risk: 155) and 85.0% at five years (95% CI 77.9 to 89.9; number at risk: 43). Dislocation of the mobile bearing occurred in 18 patients (5.6%) at three years (95% CI 1.0 to 16.4; number at risk: 154) and in 20 patients (8.5%) at five years (95% CI 1.0 to 27.0; number at risk: 42). There were no significant differences in the dislocation rate between the participating centres or the surgeons. We were not able to identify an effect of each surgeon's learning curve on the dislocation rate of the mobile bearing. The clinical outcome in patients without revision surgery at final follow-up was good to excellent, with a mean Oxford knee score of 40.3 (95% CI 39.4 to 41.2), a mean Tegner activity score of 3.2 (95% CI 3.1 to 3.3) and a mean University of California, Los Angeles score of 5.7 (95% CI 5.5 to 5.9). CONCLUSION Our data, which consists of a high number of patients treated with mobile bearing UKA in the lateral compartment, indicates a high revision rate of 15% at five years with dislocation of the mobile bearing being the main reason for implant failure. Despite the good functional and clinical results and the high patient satisfaction in our study group, we therefore discontinued using mobile-bearing lateral UKA in favour of a fixed-bearing component. Cite this article: Bone Joint J 2018;100-B:42-9.
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Affiliation(s)
- T Walker
- University of Heidelberg, Schlierbacher Landstrasse 200a, 69118 Heidelberg, Germany
| | - N Zahn
- University of Heidelberg, Schlierbacher Landstrasse 200a, 69118 Heidelberg, Germany
| | - T Bruckner
- University of Heidelberg, Im Neuenheimer Feld 305, 69120 Heidelberg, Germany
| | - M R Streit
- University of Heidelberg, Schlierbacher Landstrasse 200a, 69118 Heidelberg, Germany
| | - G Mohr
- Vulpius Clinic, Vulpiusstrasse 29, 74906 Bad Rappenau, Germany
| | - P R Aldinger
- Diakonie Clinic Paulinenhilfe, Rosenbergstrasse 38, 70176 Stuttgart, Germany
| | - M Clarius
- Vulpius Clinic, Vulpiusstrasse 29, 74906 Bad Rappenau, Germany
| | - T Gotterbarm
- University of Heidelberg, Schlierbacher Landstrasse 200a, 69118 Heidelberg, Germany
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Walker T, Stoppelkamp S, Weber M, Segan S, Sollazzo F, Lescan M, Steger V, Wendel HP, Schlensak C. Establishing an Alveolar in Vitro Model to Test Potential Pathogenic Aerosols. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1628068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- T. Walker
- Department of Thoracic and Cardiovascular Surgery, University of Tuebingen, Tuebingen, Germany
| | - S. Stoppelkamp
- Department of Thoracic and Cardiovascular Surgery, University of Tuebingen, Tuebingen, Germany
| | - M. Weber
- Department of Thoracic and Cardiovascular Surgery, University of Tuebingen, Tuebingen, Germany
| | - S. Segan
- Department of Thoracic and Cardiovascular Surgery, University of Tuebingen, Tuebingen, Germany
| | - F. Sollazzo
- Department of Thoracic and Cardiovascular Surgery, University of Tuebingen, Tuebingen, Germany
| | - M. Lescan
- Department of Thoracic and Cardiovascular Surgery, University of Tuebingen, Tuebingen, Germany
| | - V. Steger
- Department of Thoracic and Cardiovascular Surgery, University of Tuebingen, Tuebingen, Germany
| | - H.-P. Wendel
- Department of Thoracic and Cardiovascular Surgery, University of Tuebingen, Tuebingen, Germany
| | - C. Schlensak
- Department of Thoracic and Cardiovascular Surgery, University of Tuebingen, Tuebingen, Germany
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She RC, Romney MG, Jang W, Walker T, Karichu JK, Richter SS. Performance of the BacT/Alert Virtuo Microbial Detection System for the culture of sterile body fluids: prospective multicentre study. Clin Microbiol Infect 2017; 24:992-996. [PMID: 29274462 DOI: 10.1016/j.cmi.2017.12.011] [Citation(s) in RCA: 8] [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: 09/06/2017] [Revised: 12/11/2017] [Accepted: 12/12/2017] [Indexed: 12/21/2022]
Abstract
OBJECTIVES Continuous monitoring blood culture systems are commonly used for sterile body fluid cultures. In this multicentre study, we evaluated the performance of the new-generation BacT/Alert Virtuo system compared to the BacT/Alert 3D and conventional culture for the recovery of microorganisms from sterile body fluids. METHODS Peritoneal, cerebrospinal, pericardial, pleural and synovial fluids from adult patients submitted for culture were collected from three different centres. Specimens were inoculated into two bottles of the same bottle type (SA, SN, FA Plus or FN Plus) in equal volumes for simultaneous incubation in the Virtuo and 3D instruments. Each specimen was also Gram stained and seeded to solid media. RESULTS A total of 811 specimens were inoculated to 1257 bottle pairs. The Virtuo and 3D showed equivalent recovery of clinically significant microorganisms (127/155, 81.9%, vs. 126/155, 81.3%, respectively). Solid media cultures recovered fewer pathogens than either continuous monitoring system (95/155, 61.3%, p <0.001), including significantly fewer Enterobacteriaceae and enterococci. The Virtuo was significantly faster than the 3D in median time to detection of isolates from the same specimen (12.5 (range, 2.8-101.5) hours vs. 15.5 (range, 4.3-78.5) hours, p <0.001). Direct specimen Gram stain detected the eventual pathogen in 30 (26.1%) of 115 significant positive specimens. CONCLUSIONS The BacT/Alert Virtuo system was equivalent to the 3D system in organism recovery from sterile body fluid culture but showed faster detection of growth as a result of design enhancements.
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Affiliation(s)
- R C She
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA.
| | - M G Romney
- St Paul's Hospital, Providence Health Care, University of British Columbia, Vancouver, British Columbia, Canada; Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - W Jang
- St Paul's Hospital, Providence Health Care, University of British Columbia, Vancouver, British Columbia, Canada
| | - T Walker
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - J K Karichu
- Department of Laboratory Medicine, Cleveland Clinic, Cleveland, Ohio, USA
| | - S S Richter
- Department of Laboratory Medicine, Cleveland Clinic, Cleveland, Ohio, USA
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Walker T, Edge D, Shaw J, Wilson H, McNair L, Mitchell H, Gutridge K, Senior J, Sutton M, Meacock R, Abel K. Contemporary women's secure psychiatric services in the United Kingdom: A qualitative analysis of staff views. J Psychiatr Ment Health Nurs 2017; 24:660-670. [PMID: 28783204 DOI: 10.1111/jpm.12416] [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] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/02/2017] [Indexed: 11/28/2022]
Abstract
UNLABELLED WHAT IS KNOWN ON THE SUBJECT?: Three pilot UK-only Women's Enhanced Medium Secure Services (WEMSS) was opened in 2007 to support women's movement from high secure care and provide a bespoke, women-only service. Evidence suggests that women's secure services are particularly challenging environments to work in and staffing issues (e.g., high turnover) can cause difficulties in establishing a therapeutic environment. Research in this area has focused on the experiences of service users. Studies which have examined staff views have focused on their feelings towards women in their care and the emotional burden of working in women's secure services. No papers have made a direct comparison between staff working in different services. WHAT DOES THIS STUDY ADD TO EXISTING KNOWLEDGE?: This is the first study to explore the views and experiences of staff in the three UK WEMSS pilot services and contrast them with staff from women's medium secure services. Drawing upon data from eighteen semi-structured interviews (nine WEMSS, nine non-WEMSS), key themes cover staff perceptions of factors important for women's recovery and their views on operational aspects of services. This study extends our understanding of the experiences of staff working with women in secure care and bears relevance for staff working internationally, as well as in UK services. WHAT ARE THE IMPLICATIONS FOR PRACTICE?: The study reveals the importance of induction and training for bank and agency staff working in women's secure services. Further, regular clinical supervision should be mandatory for all staff so they are adequately supported. ABSTRACT Introduction Women's Enhanced Medium Secure Services (WEMSS) is bespoke, gender-sensitive services which opened in the UK in 2007 at three pilot sites. This study is the first of its kind to explore the experiences of WEMSS staff, directly comparing them to staff in a standard medium secure service for women. The literature to date has focused on the experiences of service users or staff views on working with women in secure care. Aim This qualitative study, embedded in a multimethod evaluation of WEMSS, aimed to explore the views and experiences of staff in WEMSS and comparator medium secure services. Methods Qualitative interviews took place with nine WEMSS staff and nine comparator medium secure staff. Interviews focused on factors important for recovery, barriers to facilitating recovery and operational aspects of the service. Discussion This study provides a rare insight into the perspectives of staff working in UK women's secure services, an under-researched area in the UK and internationally. Findings suggest that the success of services, including WEMSS, is compromised by operational factors such as the use of bank staff. Implications for practice Comprehensive training and supervision should be mandatory for all staff, so best practice is met and staff adequately supported.
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Affiliation(s)
- T Walker
- Division of Psychology and Mental Health, Faculty of Biology, Medicine and Health, School of Health Sciences, University of Manchester, Manchester, UK
| | - D Edge
- Division of Psychology and Mental Health, Faculty of Biology, Medicine and Health, School of Health Sciences, University of Manchester, Manchester, UK
| | - J Shaw
- Division of Psychology and Mental Health, Faculty of Biology, Medicine and Health, School of Health Sciences, Offender Health Research Network, University of Manchester, Manchester, UK
| | - H Wilson
- Lancashire Care NHS Foundation Trust, Preston, UK
| | - L McNair
- Cheshire and Wirral Partnership NHS Foundation Trust, Chester, UK
| | - H Mitchell
- Division of Psychology and Mental Health, Faculty of Biology, Medicine and Health, Centre for Women's Mental Health, School of Health Sciences, University of Manchester, Manchester, UK
| | - K Gutridge
- Division of Psychology and Mental Health, Faculty of Biology, Medicine and Health, Centre for Women's Mental Health, School of Health Sciences, University of Manchester, Manchester, UK
| | - J Senior
- Division of Psychology and Mental Health, Faculty of Biology, Medicine and Health, School of Health Sciences, Offender Health Research Network, University of Manchester, Manchester, UK
| | - M Sutton
- Centre for Health Economics, School of Health Sciences, University of Manchester, Manchester, UK
| | - R Meacock
- Centre for Health Economics, School of Health Sciences, University of Manchester, Manchester, UK
| | - K Abel
- Division of Psychology and Mental Health, Faculty of Biology, Medicine and Health, Centre for Women's Mental Health, School of Health Sciences, University of Manchester, Manchester, UK
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Lescan M, Veseli K, Oikonomou A, Walker T, Lausberg H, Blumenstock G, Bamberg F, Schlensak C, Krüger T. Aortic Elongation and Stanford B Dissection: The Tübingen Aortic Pathoanatomy (TAIPAN) Project. Eur J Vasc Endovasc Surg 2017; 54:164-169. [PMID: 28663040 DOI: 10.1016/j.ejvs.2017.05.017] [Citation(s) in RCA: 22] [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: 02/15/2017] [Accepted: 05/28/2017] [Indexed: 01/10/2023]
Abstract
OBJECTIVE/BACKGROUND Aortic elongation has not yet been considered as a potential risk factor for Stanford type B dissection (TBD). The role of both aortic elongation and dilatation in patients with TBD was evaluated. METHODS The aortic morphology of a healthy control group (n = 236) and patients with TBD (n = 96) was retrospectively examined using three dimensional computed tomography imaging. Curved multiplanar reformats were used to examine aortic diameters at defined landmarks and aortic segment lengths. RESULTS Diameters at all landmarks were significantly larger in the TBD group. The greatest diameter difference (56%) was measured in dissected descending aortas (p < .001). The segment with the most considerable difference between the study groups with regard to elongation was the non-dissected aortic arch of patients with TBD (36%; p < .001). Elongation in the aortic arch was accompanied by a diameter increase of 21% (p < .001). In receiver-operating curve analysis, the area under the curve was .85 for the diameter and .86 for the length of the aortic arch. CONCLUSIONS In addition to dilatation, aortic arch elongation is associated with the development of TBD. The diameter and length of the non-dissected aortic arch may be predictive for TBD and may possibly be used for risk assessment in the future. This study provides the basis for further prospective evaluation of these parameters.
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Affiliation(s)
- M Lescan
- Department of Thoracic and Cardiovascular Surgery, University Medical Centre Tübingen, Tübingen, Germany.
| | - K Veseli
- Department of Thoracic and Cardiovascular Surgery, University Medical Centre Tübingen, Tübingen, Germany
| | - A Oikonomou
- Department of Thoracic and Cardiovascular Surgery, University Medical Centre Tübingen, Tübingen, Germany
| | - T Walker
- Department of Thoracic and Cardiovascular Surgery, University Medical Centre Tübingen, Tübingen, Germany
| | - H Lausberg
- Department of Thoracic and Cardiovascular Surgery, University Medical Centre Tübingen, Tübingen, Germany
| | - G Blumenstock
- Institute for Clinical Epidemiology and Applied Biometry, Eberhard Karls University of Tübingen, Tübingen, Germany
| | - F Bamberg
- Department of Diagnostic and Interventional Radiology, University Medical Centre Tübingen, Tübingen, Germany
| | - C Schlensak
- Department of Thoracic and Cardiovascular Surgery, University Medical Centre Tübingen, Tübingen, Germany
| | - T Krüger
- Department of Thoracic and Cardiovascular Surgery, University Medical Centre Tübingen, Tübingen, Germany
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Elmi A, Walker T, Ganguli S, Kalva S. The Clinical and Technical Effectiveness of Endovascular Embolization in Patients with Nonvariceal Gastrointestinal Bleeding. J Clin Interv Radiol ISVIR 2017. [DOI: 10.1055/s-0037-1603564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Background and Aim Endovascular embolization is a well-established option in the management of acute gastrointestinal bleeding (GIB) after failed therapeutic endoscopy; however, questions remain concerning the outcomes and the various predictors of clinical and technical success of this therapy. The authors aimed to assess the effectiveness of endovascular embolization in patients with nonvariceal GIB.
Method Clinical records of 88 patients (mean age: 67.8 years) who underwent endovascular embolization for GIB were reviewed. Patient demographics, history, angiographic findings, treatment, and outcomes were recorded. The technical success of embolization, and the 24-hour and 30-day rebleeding and mortality rates were calculated. Multivariate analysis was performed to assess the factors associated with 24-hour and 30-day rebleeding.
Results Angiography demonstrated signs of bleeding in 63 (71.6%) patients and all underwent selective embolization of the abnormal artery. Empiric embolization was performed in 25 patients. Embolization was performed with coils (n = 45), Gelfoam (n = 12), microparticles (n = 14), glue (n = 2), or a combination of these (n = 15). The technical success rate was 96.6%. The 24-hour and 30-day rebleeding occurred in 13 (14.7%) and 16 (18.2%) patients, respectively. The 24-hour and 30-day mortality rates were 9.1 and 11.3%, respectively. Ischemic complications following embolization were seen in three patients, of which two required surgery. Based on the multivariate analysis, the need for continued transfusion after embolization and prior GIB were independent variables associated with 24-hour and 30-day rebleeding, respectively.
Conclusions Endovascular embolization has a high technical and clinical success in patients presenting with nonvariceal GIB.
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Affiliation(s)
- Azadeh Elmi
- Massachusetts General Hospital, Boston, Massachusetts, United States
| | - T. Walker
- Massachusetts General Hospital, Boston, Massachusetts, United States
| | - Suvranu Ganguli
- Massachusetts General Hospital, Boston, Massachusetts, United States
| | - Sanjeeva Kalva
- University of Texas Southwestern Medical Center, Dallas, Texas, United States
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Schibilsky D, Klumm P, Nemeth A, Krüger T, Häberle H, Henn P, Wendel H, Walker T, Schlensak C. Out-of-Center ECLS Implantation: Extended Experience of an Interdisciplinary Team Approach. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- D. Schibilsky
- Thoracic and Cardiovascular Surgery, University Medical Center Tuebingen, Tuebingen, Germany
| | - P. Klumm
- Thoracic and Cardiovascular Surgery, University Medical Center Tuebingen, Tuebingen, Germany
| | - A. Nemeth
- Thoracic and Cardiovascular Surgery, University Medical Center Tuebingen, Tuebingen, Germany
| | - T. Krüger
- Thoracic and Cardiovascular Surgery, University Medical Center Tuebingen, Tuebingen, Germany
| | - H. Häberle
- Anesthesiology and Intensive Care Medicine, University Medical Center Tuebingen, Tuebingen, Germany
| | - P. Henn
- Anesthesiology and Intensive Care Medicine, University Medical Center Tuebingen, Tuebingen, Germany
| | - H.P. Wendel
- Thoracic and Cardiovascular Surgery, University Medical Center Tuebingen, Tuebingen, Germany
| | - T. Walker
- Thoracic and Cardiovascular Surgery, University Medical Center Tuebingen, Tuebingen, Germany
| | - C. Schlensak
- Thoracic and Cardiovascular Surgery, University Medical Center Tuebingen, Tuebingen, Germany
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Nemeth A, König O, Zengerle D, Nolte A, Avci-Adali M, Walker T, Wendel H, Schlensak C. RNA Eluting Surfaces for the Modulation of Gene Expression as a Novel Stent Concept. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- A. Nemeth
- University Medical Center Tübingen, Department of Thoracic and Cardiovascular Surgery, Tübingen, Germany
| | - O. König
- University Medical Center Tübingen, Department of Thoracic and Cardiovascular Surgery, Tübingen, Germany
| | - D. Zengerle
- University Medical Center Tübingen, Department of Thoracic and Cardiovascular Surgery, Tübingen, Germany
| | - A. Nolte
- University Medical Center Tübingen, Department of Thoracic and Cardiovascular Surgery, Tübingen, Germany
| | - M. Avci-Adali
- University Medical Center Tübingen, Department of Thoracic and Cardiovascular Surgery, Tübingen, Germany
| | - T. Walker
- University Medical Center Tübingen, Department of Thoracic and Cardiovascular Surgery, Tübingen, Germany
| | - H.P. Wendel
- University Medical Center Tübingen, Department of Thoracic and Cardiovascular Surgery, Tübingen, Germany
| | - C. Schlensak
- University Medical Center Tübingen, Department of Thoracic and Cardiovascular Surgery, Tübingen, Germany
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Schibilsky D, Benk C, Berchtold-Herz M, Krüger T, Nemeth A, Walker T, Häberle H, Rosenberger P, Wendel H, Trummer G, Siepe M, Beyersdorf F, Schlensak C. Left-Ventricular-Assist-Device Weaning Protocol Including Exercise and Invasive Hemodynamics - Multi-Institutional Experience. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- D. Schibilsky
- University Medical Center Tuebingen, Thoracic and Cardiovascular Surgery, Tuebingen, Germany
| | - C. Benk
- University Medical Center Freiburg, Cardiovascular Surgery, Freiburg, Germany
| | - M. Berchtold-Herz
- University Medical Center Freiburg, Cardiovascular Surgery, Freiburg, Germany
| | - T. Krüger
- University Medical Center Tuebingen, Thoracic and Cardiovascular Surgery, Tuebingen, Germany
| | - A. Nemeth
- University Medical Center Tuebingen, Thoracic and Cardiovascular Surgery, Tuebingen, Germany
| | - T. Walker
- University Medical Center Tuebingen, Thoracic and Cardiovascular Surgery, Tuebingen, Germany
| | - H. Häberle
- University Medical Center Tuebingen, Anesthesiology and Intensive Care Medicine, Tuebingen, Germany
| | - P. Rosenberger
- University Medical Center Tuebingen, Anesthesiology and Intensive Care Medicine, Tuebingen, Germany
| | - H.P. Wendel
- University Medical Center Tuebingen, Thoracic and Cardiovascular Surgery, Tuebingen, Germany
| | - G. Trummer
- University Medical Center Freiburg, Cardiovascular Surgery, Freiburg, Germany
| | - M. Siepe
- University Medical Center Freiburg, Cardiovascular Surgery, Freiburg, Germany
| | - F. Beyersdorf
- University Medical Center Freiburg, Cardiovascular Surgery, Freiburg, Germany
| | - C. Schlensak
- University Medical Center Tuebingen, Thoracic and Cardiovascular Surgery, Tuebingen, Germany
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Misono A, Wehrenberg-Klee E, Rao S, Fadl S, Attaya H, Bonk S, Sheridan R, Loomis S, Mueller P, Walker T. Medical student IR symposia: characterizing impact on medical student career choices. J Vasc Interv Radiol 2017. [DOI: 10.1016/j.jvir.2016.12.1065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Walker T, Aldinger PR, Streit MR, Gotterbarm T. [Lateral unicompartmental knee arthroplasty - a challenge]. Oper Orthop Traumatol 2016; 29:17-30. [PMID: 27957592 DOI: 10.1007/s00064-016-0476-2] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 09/11/2016] [Accepted: 09/15/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Joint surface replacement in the lateral compartment by unicondylar knee arthroplasty. INDICATIONS Lateral unicompartmental osteoarthritis of the knee joint, avascular necrosis of the lateral femoral condyle. CONTRAINDICATIONS Full thickness cartilage defect in the central part of the medial compartment or in the medial aspect of the patellofemoral joint. Instability/contracture of cruciate and collateral ligaments, valgus deformity >15°, valgus deformity not passively correctable, flexion deformity >15°, an intraoperative flexion <100°, failed upper tibial osteotomy, rheumatoid arthritis. SURGICAL TECHNIQUE Leg positioning in leg holder. Minimally invasive parapatellar lateral arthrotomy. Exposure of the lateral compartment and removal of osteophytes. Attachment of the tibial saw guide. Horizontal cut 7-8 mm below the original tibial plateau with protection of the lateral collateral ligament. Vertical saw cut via an incision in the central aspect of the patellar ligament with an internal rotation of 20°. Femoral preparation. Insertion of the intramedullary rod, positioning of the femoral drill guide directing to the anterior superior iliac spine and drilling the holes. Insertion of the posterior resection guide. Saw cut with protection of the lateral collateral ligament. Insertion of the 0 mm spigot and first milling. Measurement of the extension gap. Insertion of the corresponding spigot (never use a spigot >5 mm). Milling and insertion of the trial components. Application of the anti-impingement guide and anterior and posterior resection of bone. Final preparation of the tibial plateau. Cementing of the components. POSTOPERATIVE MANAGEMENT Mobilization under full weight-bearing with two crutches. RESULTS With a mean follow-up of 1.7-4 years, the dislocation rate is about 0-6.6%. Revision-free survival is 90-98%.
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Affiliation(s)
- T Walker
- Zentrum für Orthopädie und Unfallchirurgie, Universitätsklinikum Heidelberg, Schlierbacher Landstr. 200a, 69118, Heidelberg, Deutschland
| | - P R Aldinger
- Orthopädische Klinik Paulinenhilfe, Diakonieklinikum Stuttgart, Rosenbergstr. 38, Stuttgart, 70176, Deutschland
| | - M R Streit
- Zentrum für Orthopädie und Unfallchirurgie, Universitätsklinikum Heidelberg, Schlierbacher Landstr. 200a, 69118, Heidelberg, Deutschland
| | - T Gotterbarm
- Zentrum für Orthopädie und Unfallchirurgie, Universitätsklinikum Heidelberg, Schlierbacher Landstr. 200a, 69118, Heidelberg, Deutschland.
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Walker T, Matrai A, Flute P, Dormandy J. Haemorheological and functional changes in intermittent claudication following plasma exchange with haemaccel. Clin Hemorheol Microcirc 2016. [DOI: 10.3233/ch-1985-5113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- T. Walker
- St. George’s Hospital, London, England
- St. James’s Hospital, London, England
| | - A. Matrai
- St. George’s Hospital, London, England
- St. James’s Hospital, London, England
| | - P.T. Flute
- St. George’s Hospital, London, England
- St. James’s Hospital, London, England
| | - J.A. Dormandy
- St. George’s Hospital, London, England
- St. James’s Hospital, London, England
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Valtis Y, Wachter K, Chande R, Mashili F, Kisenge R, Walker T, Kennedy N, Maling S, Bhandari S, Teichman M, Barron E, Gilpin D, Bonis P, Weintraub R. Expanding access to evidence-based medicine to physicians and medical
students in resource-poor settings to improve medical education. Ann Glob Health 2016. [DOI: 10.1016/j.aogh.2016.04.578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Balesh E, Misono A, Attaya H, Wehrenberg-Klee E, Rao S, Specht K, Bonk S, Loomis S, Sheridan R, Mueller P, Walker T. Medical student perceptions of interventional radiology (IR): impact of an IR symposium. J Vasc Interv Radiol 2016. [DOI: 10.1016/j.jvir.2015.12.599] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Adams A, Gore J, Musser F, Cook D, Catchot A, Walker T, Dobbins C. Efficacy of Selected Insecticides Applied to Hybrid Rice Seed. J Econ Entomol 2016; 109:200-6. [PMID: 26537671 PMCID: PMC4765485 DOI: 10.1093/jee/tov310] [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] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 10/07/2015] [Indexed: 05/13/2023]
Abstract
Hybrid rice and insecticide seed treatments targeting rice water weevil, Lissorhoptrus oryzophilus Kuschel, have altered the landscape of rice production. The effect of reduced seeding rates on seed treatment efficacy in hybrid rice has not been studied. During 2011 and 2012, an experiment was conducted at seven locations to determine the relationship between low seeding rates used in hybrid rice and efficacy of selected insecticidal seed treatments as measured by rice water weevil densities and yield. Labeled rates of thiamethoxam, chlorantraniliprole, and clothianidin were compared with higher rates of these products to determine if labeled rates provide an acceptable level of control of the rice water weevil. Study locations were divided into low, moderate, and high groups based on rice water weevil larval densities. All seed treatments and seed treatment rates reduced rice water weevil densities. However, there was no observed yield or economic benefit from the use of an insecticidal seed treatment in areas of low pressure. Differences in yield were observed among seed treatments and seed treatment rates in moderate and high pressure locations, and all seed treatments yielded better than the untreated plots, but these differences were not always economical. All seed treatments showed an economic advantage in areas of high weevil pressure, and there were no differences among seed treatment products or rates, suggesting that currently labeled seed treatment rates in hybrid rice are effective for rice water weevil management.
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Affiliation(s)
- A Adams
- Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University, MS 39762 (; ; )
| | - J Gore
- Delta Research and Extension Center (DREC), Mississippi State University, Stoneville, MS 38776 (; ; ; )
| | - F Musser
- Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University, MS 39762 (; ; )
| | - D Cook
- Delta Research and Extension Center (DREC), Mississippi State University, Stoneville, MS 38776 (; ; ; )
| | - A Catchot
- Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University, MS 39762 (; ; )
| | - T Walker
- Delta Research and Extension Center (DREC), Mississippi State University, Stoneville, MS 38776 (; ; ; )
| | - C Dobbins
- Delta Research and Extension Center (DREC), Mississippi State University, Stoneville, MS 38776 (; ; ; )
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Nelson C, Banks S, Jeffries CL, Walker T, Logan JG. Tick abundances in South London parks and the potential risk for Lyme borreliosis to the general public. Med Vet Entomol 2015; 29:448-452. [PMID: 26400641 DOI: 10.1111/mve.12137] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 08/12/2015] [Accepted: 08/14/2015] [Indexed: 06/05/2023]
Abstract
Tick abundances and prevalences of infection with Borrelia burgdorferi sensu lato, the causative agent of Lyme disease, were investigated in four South London parks. A total of 360 transects were sampled using three methods of collection (blanket, leggings and flags) simultaneously. No ticks were found on Wimbledon Common or at Hampton Court, but 1118 Ixodes ricinus (Ixodida: Ixodidae) ticks were collected at Richmond and Bushy Parks. At Richmond Park, lower canopy humidity [odds ratio (OR) 0.94; P = 0.005], increased mat depth (OR 1.15; P < 0.001) and increased soil moisture (OR 1.40; P = 0.001) predicted the presence of I. ricinus, and increased sward height [incidence rate ratio (IRR) 1.01; P = 0.006] and decreased ground temperature (IRR 0.90; P = 0.009) predicted increased abundance. At Bushy Park, thicker mat depth predicted tick presence (OR 1.17; P = 0.006) and increasing temperature correlated with tick absence (OR 0.57; P = 0.023). A total of 279 ticks were screened for the presence of B. burgdorferi using quantitative polymerase chain reaction. Point prevalences of 0% for larvae (n = 78), 2.14% for nymphs (n = 174) and 0% for adult ticks (n = 7) related to an acarological risk of 0.22 infected ticks per 40 m transect in Richmond Park. The abundance of ticks and the acarological risk, particularly at Richmond Park, highlight the need for appropriate communication of the associated risk to the general public frequenting these recreational areas.
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Affiliation(s)
- C Nelson
- Department of Disease Control, London School of Hygiene & Tropical Medicine, London, U.K
| | - S Banks
- Department of Disease Control, London School of Hygiene & Tropical Medicine, London, U.K
| | - C L Jeffries
- Department of Disease Control, London School of Hygiene & Tropical Medicine, London, U.K
| | - T Walker
- Department of Disease Control, London School of Hygiene & Tropical Medicine, London, U.K
| | - J G Logan
- Department of Disease Control, London School of Hygiene & Tropical Medicine, London, U.K
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Walker T, Thomas J, Pring A, Thomas S, Verne J, Fleming S. Factors influencing place of death from head & neck cancer in England 2003–2012. Br J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.bjoms.2015.08.220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Wilson M, Walker T, Fleming S, Pring A, Hughes C, Thomas S, Verne J. Quality of end of life care in thyroid cancer in England 2003–2012. Br J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.bjoms.2015.08.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Lijovic M, Bernard S, Nehme Z, Walker T, Smith K. Public access defibrillation—results from the Victorian Ambulance Cardiac Arrest Registry. Resuscitation 2015; 85:1739-44. [PMID: 25449346 DOI: 10.1016/j.resuscitation.2014.10.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 09/12/2014] [Accepted: 10/01/2014] [Indexed: 10/24/2022]
Abstract
AIM To assess the impact of automated external defibrillator (AED) use by bystanders in Victoria, Australia on survival of adults suffering an out-of-hospital cardiac arrest (OHCA) in a public place compared to those first defibrillated by emergency medical services (EMS). METHODS We analysed data from the Victorian Ambulance Cardiac Arrest Registry for individuals aged >15 years who were defibrillated in a public place between 1 July 2002 and 30 June 2013, excluding events due to trauma or witnessed by EMS. RESULTS Of 2270 OHCA cases who arrested in a public place, 2117 (93.4%) were first defibrillated by EMS and 153 (6.7%) were first defibrillated by a bystander using a public AED. Use of public AEDs increased almost 11-fold between 2002/2003 and 2012/2013, from 1.7% to 18.5%, respectively (p < 0.001). First defibrillation occurred sooner in bystander defibrillation (5.2 versus 10.0 min, p < 0.001). Unadjusted survival to hospital discharge for bystander defibrillated patients was significantly higher than for those first defibrillated by EMS (45% versus 31%, p < 0.05). Multivariable logistic regression analysis showed that first defibrillation by a bystander using an AED was associated with a 62% increase in the odds of survival to hospital discharge (adjusted odds ratio 1.62, 95% CI: 1.12–2.34, p = 0.010) compared to first defibrillation by EMS. CONCLUSION Survival to hospital discharge is improved in patients first defibrillated using a public AED prior to EMS arrival in Victoria, Australia. Encouragingly, bystander AED use in Victoria has increased over time. More widespread availability of AEDs may further improve outcomes of OHCA in public places.
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Walker T, Thomas S, Verne J. Quality of end of life care in head and neck cancer in England 2003–2012. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Stoleriu MG, Avci-Adali M, Wendel HP, Schlensak C, Walker T. Control of the efficiency of instrument-cleaning using real-time Polymerase Chain Reaction. Zentralbl Chir 2015. [DOI: 10.1055/s-0035-1559923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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