alexa Incidence and risk factors of recurrent acute lung injury.
Pulmonology

Pulmonology

Journal of Clinical Respiratory Diseases and Care

Author(s): Bice T, Li G, Malinchoc M, Lee AS, Gajic O, Bice T, Li G, Malinchoc M, Lee AS, Gajic O

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Abstract OBJECTIVE: To determine risk factors for development of recurrent acute lung injury. DESIGN: A population-based case-control study. SETTING: The study was conducted in Olmsted County, MN, from 1999 to 2008. PATIENTS: Using a validated electronic screening protocol, investigators identified intensive care patients with acute hypoxemia and bilateral pulmonary infiltrates. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: The presence of acute lung injury was independently confirmed according to American-European Consensus Conference criteria. Recurrent acute lung injury cases were subsequently matched (1:1:1) with two controls (single acute lung injury and no acute lung injury) on age, gender, duration of follow-up, and predisposing conditions. Risk factors evaluated included gastroesophageal reflux disease, alcohol consumption, smoking, chronic opioid use, and transfusions. We identified 917 patients with acute lung injury, 19 of which developed a second episode, yielding a frequency of 2.02 (95\% confidence interval 1.10-2.93) per 100,000 person years. The median time to development of the second episode was 264 days (interquartile range 80-460 days), with a mortality of 47\% during the episode. The history of gastroesophageal reflux disease was highly prevalent in patients who developed recurrent acute lung injury: 15 of 19 patients (79\%) compared to 5 of 19 (26\%) matches with a single episode of acute lung injury (p = .006) and 8 of 19 (42\%) matches without acute lung injury (p = .016). Other exposures were similar between the cases and the two matched controls. CONCLUSIONS: Recurrent acute lung injury is not a rare phenomenon in the intensive care unit and may continue to increase with improvements in survival following acute lung injury. Gastroesophageal reflux disease was identified as an important risk factor for recurrent acute lung injury and may suggest an important role of gastric aspiration in the development of this syndrome.
This article was published in Crit Care Med and referenced in Journal of Clinical Respiratory Diseases and Care

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