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Extracorporeal Membrane Oxygenation for Severe Refractory Respiratory Failure Secondary to 2009 H1N1 Influenza A

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Abstract:

BACKGROUND: Respiratory failure and acute respiratory distress syndrome secondary to H1N1 influenza infection is a source of substantial morbidity and mortality, having caused over 265,000 hospitalizations in the United States in 2009. During the H1N1 pandemic, up to 31% of the H1N1 patients required intensive care unit admission, and many were refractory to maximal conventional therapies. These most critically ill patients may require extracorporeal membrane oxygenation (ECMO) for survival. METHODS: We retrospectively reviewed the medical records of the 7 patients with refractory hypoxemia due to H1N1 influenza who were treated with ECMO in our pediatric intensive care unit. RESULTS: Five of the 7 patients survived to hospital discharge. The cohort's mean age was 21 years, and 4 were female. At admission to the pediatric intensive care unit, 6 had at least one comorbid condition, 6 were mechanically ventilated, and one was in shock. All 7 patients were treated with oral oseltamivir, high-frequency oscillatory ventilation, and inhaled nitric oxide prior to ECMO. Five received intravenous steroids, and 2 were treated with compassionate-use intravenous zanamivir. The mean duration of pre-ECMO ventilation was 8.7 days (range 14 h to 25 d). Mean oxygenation index was 50 (range 26‐73) at ECMO cannulation. Six received venovenous ECMO, and one received venoarterial ECMO. The mean duration of ECMO was 432 hours (range 192‐890 h). CONCLUSIONS: This series suggests that ECMO is a viable treatment for refractory hypoxemia secondary to H1N1 influenza infection in both pediatric and adult patients.

Keywords: ARDS; ECMO; H1N1; acute lung injury; acute respiratory distress syndrome; extracorporeal membrane oxygenation; hypoxemia; influenza; mechanical ventilation; respiratory failure

Document Type: Research Article

DOI: http://dx.doi.org/10.4187/respcare.01066

Affiliations: 1: Division of Pediatric Critical Care Medicine, Department of Pediatrics, Duke University Medical Center, Durham, North Carolina, USA 2: Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA 3: Respiratory Care Services, Duke University Hospital, Duke University Medical Center, Durham, North Carolina, USA

Publication date: July 1, 2011

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