Publications by authors named "John Francis Fraser"

Guidelines for transcatheter aortic valve replacement (TAVR) antithrombotic prophylaxis are extrapolated predominantly from percutaneous coronary intervention (PCI) data. Here, we examined temporal coagulation changes occurring in the early perioperative period to determine the pathobiologic validity of this supposition. This was a prospective observational study of consecutive patients who underwent transfemoral TAVR (n = 27), PCI (n = 12), or surgical aortic valve replacement (SAVR) requiring cardiopulmonary bypass and cross-clamping (n = 12).

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Background And Objectives: To date, the effects of FFP and PC storage duration on mortality have only been studied in a few studies in limited patient subpopulations. The aim of the current study was to determine whether FFP and PC storage duration is associated with increased in hospital mortality risk across cardiac surgery, acute medicine, ICU and orthopaedic surgery patients.

Materials And Methods: Two-stage individual patient data meta-analyses were performed to determine the effects of FFP and PC storage duration on in hospital mortality.

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Article Synopsis
  • The Sepsis-3 definitions were created using adult data from wealthy countries, highlighting a gap in pediatric care.
  • The high mortality rates from sepsis, particularly in children from low and middle-income countries, underscore the need for urgent action.
  • Developing and validating standardized sepsis criteria for children is essential for assessing treatment strategies and improving clinical outcomes globally.
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Platelet concentrate (PC) transfusions are a lifesaving adjunct to control and prevent bleeding in cancer, hematologic, surgical, and trauma patients. Platelet concentrate availability and safety are limited by the development of platelet storage lesions (PSLs) and risk of bacterial contamination. Platelet storage lesions are a series of biochemical, structural, and functional changes that occur from blood collection to transfusion.

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Purpose: There is substantial conjecture regarding the clinical significance of packed red blood cell (PRBC) changes that occur during in vitro storage. Here, we present a meta- and systematic analysis of adult studies published between 1994 and 2015 with the aim of updating existing quantitative reviews and providing a comprehensive cover of the six most commonly studied outcomes-mortality, infection, renal dysfunction, multiple organ dysfunction syndrome (MODS), thrombotic complications and prolonged hospital length of stay.

Methods: Computerised searches of Pubmed and EMBASE identified publications that reported target outcomes and PRBC storage duration prior to transfusion.

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There is an increased oxidative stress response in patients having cardiac surgery, haemodialysis or extracorporeal membrane oxygenation that is related to poorer outcomes and increased mortality. Exposure of the patients' blood to the artificial surfaces of these extracorporeal devices, coupled with inflammatory responses, hyperoxia and the pathophysiological aspects of the underlying illness itself, all contribute to this oxidative stress response. Oxidative stress occurs when there is a disruption of redox signalling and loss of control of redox balance.

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Extracorporeal life support can be viewed as a spectrum of modalities based on modifications of a cardiopulmonary bypass circuit to provide cardiac and respiratory support, which can be used for extended periods, from hours to several weeks. Extracorporeal membrane oxygenation (ECMO) is among the most frequently used forms of extracorporeal life support. It can be configured for venovenous blood flow, to provide adequate oxygenation and carbon dioxide removal in isolated refractory respiratory failure, or in a venoarterial configuration, when support is required for cardiac and/or respiratory failure.

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