693 research outputs found

    Mineralization of Cortical Bone of the Lower Extremity Depends on Site

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    Paid work, household work, or leisure? Time allocation pathways among women following a cancer diagnosis

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    NG is funded by the Aberdeen-Curtin Joint Studentship (University of Aberdeen Development Trust) and the Elphinstone Scholarship Scheme.Peer reviewedPostprin

    Bedrest in healthy women: Effects of menstrual function and oral contraceptives

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    With the development of the space shuttle program, space flight for the first time is available to individuals who have not been specially selected and trained to be astronauts. In addition, women are being actively recruited into the space program, both as mission specialists and as career astronauts. One purpose of this project was to examine some of the physiological responses of women to a simulated weightlessness program (12 day horizontal bedrest), to compare their responses to those reported in men during similar programs, and to test whether menstrual function might alter some of the physiological changes which occur during bedrest, specifically changes in the plasma volume, exercise tolerance, and venous compliance before and after bedrest

    Towards understanding the clinical significance of QT peak prolongation: a novel marker of myocardial ischemia independently demonstrated in two prospective studies

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    Background: QT peak prolongation identified patients at risk of death or non-fatal MI. We tested the hypothesis that QT peak prolongation might be associated with significant myocardial ischaemia in two separate cohorts to see how widely applicable the concept was. Methods and Results: In the first study, 134 stroke survivors were prospectively recruited and had 12-lead ECGs and Nuclear myocardial perfusion scanning. QT peak was measured in lead I of a 12-lead ECG and heart rate corrected by Bazettā€™s formula (QTpc). QTpc prolongation to 360ms or more was 92% specific at diagnosing severe myocardial ischaemia. This hypothesis-generating study led us to perform a second prospective study in a different cohort of patients who were referred for dobutamine stress echocardiography. 13 of 102 patients had significant myocardial ischaemia. Significant myocardial ischaemia was associated with QT peak prolongation at rest (mean 354ms, 95% CI 341-367ms, compared with mean 332ms, 95% CI 327-337ms in those without significant ischaemia; p=0.002). QT peak prolongation to 360ms or more was 88% specific at diagnosing significant myocardial ischaemia in the stress echocardiography study. QT peak prolongation to 360ms or more was associated with over 4-fold increase odds ratio of significant myocardial ischaemia. The Mantel- Haenszel Common Odds Ratio Estimate=4.4, 95% CI=1.2-16.0, p=0.023. Conclusion: QT peak (QTpc) prolongation to 360ms or more should make us suspect the presence of significant myocardial ischaemia. Such patients merit further investigations for potentially treatable ischaemic heart disease to reduce their risk of subsequent death or non-fatal MI

    In My View

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    BACKGROUND CONTEXT: Prior studies by our group have shown that nicotine delivered via a transdermal nicotine patch significantly enhanced posterior spinal fusion rates in rabbits. This runs contrary to previously published studies by other groups in which nicotine administration decreased fusion rates. Hence, there may be a dose-dependent effect of nicotine on posterior spinal fusion outcomes

    Challenges and Opportunities for Disinvestment in Australia: A need to evaluate the implementation and impact of Choosing Wisely in Australia

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    Purpose ā€“ Worldwide, there is significant growth in the cost of (and demand for) healthcare, which often clashes with a requirement to contain expenditure. This duality leads to an increasing need for a systematic approach to disinvestment in health technologies. The purpose of this paper is to consider the challenges and opportunities for disinvestment policy decisions in Australia. It discusses the implementation of the Choosing Wisely campaign and the need for rigorous evaluation of such campaigns in the Australian healthcare system. Design/methodology/approach ā€“ The authors highlight characteristics of disinvestment: what it is and what it is not and discuss international examples of identifying low value care, including the recent Choosing Wisely initiative. The authors discuss the barriers to implementing initiatives such as Choosing Wisely and the complexities in evaluating their effectiveness. Findings ā€“ While the primary purpose of the Choosing Wisely campaign is improved decision making through clinical engagement, it is expected that implementation could lead to resource savings alongside improvements in patient safety and service quality. While there is research looking to understand the barriers and facilitators to the implementation of initiatives such as Choosing Wisely, little is known about broader patient impacts, and more attention on the quantification of their effect on both patient outcomes and resource use is needed. Originality/value ā€“ This work highlights the limited knowledge around implementation of disinvestment strategies and the paucity of research around the impact of strategies such as Choosing Wisely in the Australian public hospital system. This is important as future research in this area will give greater certainty about the benefits and consequences of Choosing Wisely leading to improved opportunities for resource savings and patient safety and quality
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