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Clinical Trial Summary

Influenza A (H1N1) v2009 infection was responsible throughout the world of viral pneumonia and severe pulmonary edema requiring rescue therapeutics such as extracorporeal oxygenation. To date, no data exist on the outcome of patients having developed acute respiratory distress syndrome (ARDS) due to influenza A (H1N1) v2009, and in particular in patients with very severe lung injury requiring extracorporeal oxygenation. Although data exist on long-term outcome of survivors of ARDS, the patients included in the observational studies were heterogeneous with various underlying disease. Moreover, no study compared the outcome of survivors of ARDS according to the need or not of extracorporeal oxygenation. We therefore conducted this prospective case-control study to compare the long term pulmonary and extra pulmonary function in 2 groups of patients, one with severe ARDS due to H1N1 requiring extracorporeal oxygenation (case), and the second with ARDS due to H1N1 but without need for extracorporeal oxygenation (control). Eighteen case patients with inclusion and without non-inclusion criteria were selected from our national registry, and 32 controls (with inclusion and exclusion criteria) were matched on age, sex, and body mass index. All 48 patients will be contacted and asked to participate. Patients will be evaluate at least 9 months after ICU discharge, looking for health-related quality of life, measured by the Medical Outcomes Study 36-item Short-Form General Health Survey (SF-36), post traumatic stress disorder, assessed by the Impact of Event Scale Anxiety, and depression, assessed by the Hospital and Depression Score. Pulmonary function testing, including VO2 max test on a static bike will be performed. Muscle weakness will be clinically evaluated by the medical council research (MRC) test, with an additional electromyography if the result of the test was <48/60. A CT-scan will be performed, looking for lung abnormalities (fibrosis...). Albumin and prealbumin will be measured to evaluate the nutritional status.

Primary outcome measurement is carbon monoxide diffusion capacity. The primary hypothesis is that patients with extracorporeal oxygenation will have a carbon monoxide diffusion capacity lower than patients without extracorporeal oxygenation (15% difference between groups). Inclusion of 13 patients in the case group and 26 patients in the control group will allow testing this hypothesis with a statistical power of 80% (standard deviation 15%). Secondary outcome measures will be the quality of life, the presence or not of post-traumatic stress disorders, of anxiety and/or depression, the results of pulmonary function testing, of the CT-scan, and of muscle testing. All results will be compared in patients with and without extracorporeal oxygenation.


Clinical Trial Description

n/a


Study Design

Observational Model: Case Control, Time Perspective: Prospective


Related Conditions & MeSH terms


NCT number NCT01271842
Study type Observational
Source Institut National de la Santé Et de la Recherche Médicale, France
Contact
Status Completed
Phase N/A
Start date October 2010

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