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| | | ![]() Prone Position Does Not Provide Survival Benefit for Ventilated Patients With Hypoxemia CHICAGO -- November 10, 2009 -- Despite a current suggestion that patients with acute respiratory distress syndrome (ARDS) be positioned lying face down while receiving mechanical ventilation, study results indicate that this positioning does not significantly lower the risk of death compared with similar patients positioned lying face up during ventilation, according to a study published in the November 11 issue of JAMA. Paolo Taccone, MD, Fondazione IRCCS - Ospedale Maggiore Policlinico, Mangiagalli, Regina Elena di Milano, Milan, Italy, and colleagues conducted a multicentre, randomised, controlled trial to detect the potential survival benefit of prone positioning in patients with moderate and severe hypoxemia who are affected by ARDS. The study included 342 adult patients with ARDS receiving mechanical ventilation, enrolled from February 2004 through June 2008 and stratified into subgroups with moderate (n = 192) and severe (n = 150) hypoxemia. Patients were randomised to undergo supine (lying face up; n = 174) or prone (20 hours per day; n = 168) positioning during ventilation. The researchers found that prone and supine patients from the entire study population had similar 28-day (31.0% vs 32.8%) and 6-month (47.0% vs 52.3%) mortality rates, despite significantly higher complication rates in the prone group. Outcomes were also similar for patients with moderate hypoxemia in the prone and supine groups at 28 days (25.5% vs 22.5%) and at 6 months (42.6% vs 43.9%). The 28-day mortality of patients with severe hypoxemia was 37.8% in the prone and 46.1% in the supine group, while their 6-month mortality was 52.7% and 63.2%, respectively. Median Sequential Organ Failure Assessment (SOFA) scores, ventilator-free days, and intensive care unit length of stay were also similar between the different groups of patients. “Undoubtedly, the data of the present trial together with previous results clearly indicate that prolonged prone positioning, in the unselected ARDS population, is not indicated as a treatment,” the authors wrote. “However, its potential role in patients with the most severe hypoxemia, for whom the possible benefit could outweigh the risk of complications, must be further investigated, considering the strong pathophysiological background, the post hoc result of our previous study, the most recent meta-analysis, and the favourable trend observed prospectively in this study.”
SOURCE: JAMA
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