Institution
St Bartholomew's Hospital
Healthcare•London, United Kingdom•
About: St Bartholomew's Hospital is a healthcare organization based out in London, United Kingdom. It is known for research contribution in the topics: Population & Cancer. The organization has 11054 authors who have published 13229 publications receiving 501102 citations. The organization is also known as: St. Bartholomew's Hospital & The Royal Hospital of St Bartholomew.
Topics: Population, Cancer, Transplantation, Diabetes mellitus, Pregnancy
Papers published on a yearly basis
Papers
More filters
••
TL;DR: The findings indicate that prisons are a high-risk environment for heroin and other drug initiation and use and there is a need to explore ways of reducing heroin initiation in prison as part of a broader risk-prevention strategy.
Abstract: Aims To investigate heroin and cocaine use in a sample of British prisoners, and to explore the characteristics of inmates who use these drugs for the first time while in prison. Design, participants A cross-sectional survey of all prisons in England and Wales conducted as part of a major national study of psychiatric morbidity. A total of 3142 prisoners (88.2% of those selected) completed a structured interviewer-administered questionnaire. Measurements Interview measures of personal demographics, social history, psychiatric morbidity and drug use. Personality disorders were diagnosed via the Structured Clinical Interview for DSM-IV (SCID-II) and neurotic symptoms were assessed using the revised Clinical Interview Schedule (CIS-R). Findings More than 60% of the heroin users and cannabis users reported that they had used these drugs in prison compared with less than a quarter of the life-time cocaine users. More than a quarter of the heroin users reported that they had initiated use of this drug in prison. The extent of an individual’s experience of prison was related more consistently to heroin and/or cocaine use in and out of prison than other personal background, social history or psychiatric variables assessed. Conclusions The findings indicate that prisons are a high-risk environment for heroin and other drug initiation and use. Although related to drug use, psychiatric variables were not generally associated with initiation in prison, which was dominated by prison exposure. There is a need to explore ways of reducing heroin initiation in prison as part of a broader risk-prevention strategy.
132 citations
••
132 citations
•
TL;DR: Hypertension developing during rHu EPO therapy should be controlled by conventional antihypertensive therapy, and if hypertension persists, the rHuEPO dose should be reduced or therapy temporarily discontinued.
132 citations
••
TL;DR: A preliminary histological report of platelet clumps seen at necropsy in nail bed capillaries of clubbed fingers supports the hypothesis that clubbing and hypertrophic osteoarthropathy are due to the peripheral impaction of megakaryocytes and plateletClumps in the fingers and toes.
Abstract: The evidence is reviewed for the hypothesis that clubbing and hypertrophic osteoarthropathy are due to the peripheral impaction of megakaryocytes and platelet clumps in the fingers and toes, to which this particulate matter has passed in an axial stream. The normal pulmonary vascular bed retains these large particles, which fragment before entering the systemic circulation. A right-to-left shunt allows them to bypass the pulmonary vascular bed. A preliminary histological report of platelet clumps seen at necropsy in nail bed capillaries of clubbed fingers supports the hypothesis. Platelets contain and release platelet-derived growth factor, whose known effects could explain all the pathological changes in clubbing. In addition to explaining why clubbing should occur in cyanotic congenital heart disease, clubbing in sub-acute bacterial endocarditis and distal to infected arterial grafts and aneurysms can be understood in terms of platelet clumps breaking off valves or arterial walls, and passing distally. Clubbing in liver disease is associated with multiple small pulmonary arteriovenous anastomoses which allow large particles through. Hypertrophic osteoarthropathy probably shares the same mechanism, and is mainly attributable to PDGF release; but there may also be altered platelet function and an additional growth factor derived from the lungs.
132 citations
••
National Institute of Standards and Technology1, University of Western Australia2, University of Twente3, German National Metrology Institute4, Humboldt University of Berlin5, Cambridge University Hospitals NHS Foundation Trust6, Imperial College London7, University of Milan8, Vita-Salute San Raffaele University9, Queen Mary University of London10, University of Stirling11, Beth Israel Deaconess Medical Center12, University of Virginia Health System13, National Institutes of Health14, University College London15, St Bartholomew's Hospital16
TL;DR: A phantom-based quality assurance (QA) system for verification of measurement stability over time at individual sites, with further aims of generalization of results across sites, vendor systems, software versions and imaging sequences is developed.
Abstract: T1 mapping and extracellular volume (ECV) have the potential to guide patient care and serve as surrogate end-points in clinical trials, but measurements differ between cardiovascular magnetic resonance (CMR) scanners and pulse sequences. To help deliver T1 mapping to global clinical care, we developed a phantom-based quality assurance (QA) system for verification of measurement stability over time at individual sites, with further aims of generalization of results across sites, vendor systems, software versions and imaging sequences. We thus created T1MES: The T1 Mapping and ECV Standardization Program. A design collaboration consisting of a specialist MRI small-medium enterprise, clinicians, physicists and national metrology institutes was formed. A phantom was designed covering clinically relevant ranges of T1 and T2 in blood and myocardium, pre and post-contrast, for 1.5 T and 3 T. Reproducible mass manufacture was established. The device received regulatory clearance by the Food and Drug Administration (FDA) and Conformite Europeene (CE) marking. The T1MES phantom is an agarose gel-based phantom using nickel chloride as the paramagnetic relaxation modifier. It was reproducibly specified and mass-produced with a rigorously repeatable process. Each phantom contains nine differently-doped agarose gel tubes embedded in a gel/beads matrix. Phantoms were free of air bubbles and susceptibility artifacts at both field strengths and T1 maps were free from off-resonance artifacts. The incorporation of high-density polyethylene beads in the main gel fill was effective at flattening the B
1 field. T1 and T2 values measured in T1MES showed coefficients of variation of 1 % or less between repeat scans indicating good short-term reproducibility. Temperature dependency experiments confirmed that over the range 15–30 °C the short-T1 tubes were more stable with temperature than the long-T1 tubes. A batch of 69 phantoms was mass-produced with random sampling of ten of these showing coefficients of variations for T1 of 0.64 ± 0.45 % and 0.49 ± 0.34 % at 1.5 T and 3 T respectively. The T1MES program has developed a T1 mapping phantom to CE/FDA manufacturing standards. An initial 69 phantoms with a multi-vendor user manual are now being scanned fortnightly in centers worldwide. Future results will explore T1 mapping sequences, platform performance, stability and the potential for standardization.
131 citations
Authors
Showing all 11065 results
Name | H-index | Papers | Citations |
---|---|---|---|
Philippe Froguel | 166 | 820 | 118816 |
Geoffrey Burnstock | 141 | 1488 | 99525 |
Michael A. Kamm | 124 | 637 | 53606 |
David Scott | 124 | 1561 | 82554 |
Csaba Szabó | 123 | 958 | 61791 |
Roger Williams | 122 | 1455 | 72416 |
Derek M. Yellon | 122 | 638 | 54319 |
Walter F. Bodmer | 121 | 579 | 68679 |
John E. Deanfield | 120 | 497 | 61067 |
Paul Bebbington | 119 | 583 | 46341 |
William C. Sessa | 117 | 383 | 52208 |
Timothy G. Dinan | 116 | 689 | 60561 |
Bruce A.J. Ponder | 116 | 403 | 54796 |
Alexandra J. Lansky | 114 | 632 | 54445 |
Glyn Lewis | 113 | 734 | 49316 |