title: Extracorporeal Membrane Oxygenation for ARDS: National Trends in the United States 2008-2012.
abstract: BACKGROUND
  Recent advances in technology and protocols have made the use of extracorporeal membrane oxygenation (ECMO) a viable rescue therapy for patients with ARDS who present with refractory hypoxemia. Despite the lack of strong evidence supporting the use of ECMO in ARDS, its use seems to be increasing. We sought to determine recent trends in the use of ECMO for ARDS. We also assessed trends in mortality among patients with ARDS in whom ECMO was used.
  
  
  METHODS
  We performed a retrospective analysis using the largest all-payer in-patient healthcare database in the United States, the Healthcare Cost and Utilization project, the National In-patient Sample database from 2008 to 2012. Subjects with ARDS were identified using carefully chosen International Classification of Diseases, Ninth Revision codes.
  
  
  RESULTS
  We found that in 2008, about 1 in 1,000 subjects with ARDS underwent ECMO. Over the subsequent 4-y time period, there was a 0.19% absolute increase and 70% relative increase in the use of ECMO for ARDS. The mortality rate among subjects with ARDS in whom ECMO was used declined from 78% in 2008 to 64% in 2012. We also found a trend toward a reduction in hospital stay among survivors.
  
  
  CONCLUSIONS
  In the United States, between 2008 and 2012, there was an increasing trend toward the use of ECMO in patients with ARDS that coincided with a slight increase in survival among these patients.
authors.affiliation: Department of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of Arizona Health Sciences, Tucson, AZ. bnatt@deptofmed.arizona.edu.
authors.forename: Bhupinder S
authors.initials: BS
authors.lastname: Natt
authors.affiliation: Department of Internal Medicine, University of Arizona Health Sciences, Tucson, AZ.
authors.forename: Hem
authors.initials: H
authors.lastname: Desai
authors.affiliation: Department of Internal Medicine, University of Arizona Health Sciences, Tucson, AZ.
authors.forename: Nirmal
authors.initials: N
authors.lastname: Singh
authors.affiliation: Department of Internal Medicine, University of Arizona Health Sciences, Tucson, AZ.
authors.forename: Chithra
authors.initials: C
authors.lastname: Poongkunran
authors.affiliation: Department of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of Arizona Health Sciences, Tucson, AZ.
authors.forename: Sairam
authors.initials: S
authors.lastname: Parthasarathy
authors.affiliation: Department of Pulmonary, Critical Care, Allergy, and Sleep Medicine, University of Arizona Health Sciences, Tucson, AZ.
authors.forename: Christian
authors.initials: C
authors.lastname: Bime
mesh_terms: D016208:Databases, Factual; D015199:Extracorporeal Membrane Oxygenation / Q000401:mortality / Q000706:statistics & numerical data / Q000639:trends*; D005260:Female; D006801:Humans; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D012128:Respiratory Distress Syndrome / Q000401:mortality / Q000628:therapy*; D012189:Retrospective Studies; D016896:Treatment Outcome; D014481:United States
keywords: Acute lung injury/ARDS; ECMO; Epidemiology