Allan J Walkey1, Renda Soylemez Wiener. 1. Boston University School of Medicine, The Pulmonary Center, Boston, MA 02118, USA. alwalkey@bu.edu
Abstract
PURPOSE: We assessed factors associated with underuse of lung-protective ventilation (LPV) in patients with acute lung injury (ALI). METHODS: A secondary analysis of Acute Respiratory Distress Syndrome Clinical Trials Network trial data, 1999 to 2005, was conducted. Tidal volumes recorded before trial randomization were analyzed to determine receipt of LPV (tidal volume ≤ 6.5 mL/kg of predicted body weight [PBW]). RESULTS: Of 1385 participants, 430 (31.2%) received LPV. Average tidal volume was 7.65 ± 1.82 mL/kg PBW; measured tidal volumes were greater than "lung-protective" tidal volumes predicted by 6.5 mL/kg PBW (mean difference, 67 ± 108 mL; P < .0001). Multivariate predictors of LPV underuse were older age (odds ratio [OR] per SD year, 1.18; 95% confidence interval [CI], 1.02-1.38), white race (OR, 1.40; 95% CI, 1.05-1.88), shorter stature (OR per SD centimeter, 0.55; 95% CI, 0.48-0.63), lower Simplified Acute Physiology II Score (OR per SD, 0.78; 95% CI, 0.67-0.92), lower lung injury score (OR per SD, 0.83; 95% CI, 0.70-0.95), decreased serum bicarbonate (OR per SD mmol/L, 0.83; 95% CI, 0.71-0.97), shorter preenrollment intensive care unit stay (OR per SD day, 0.84; 95% CI, 0.73-0.98), and use of non-volume-controlled ventilation (OR, 3.07; 95% CI, 1.78-5.27). Setting tidal volumes to 450 mL (men) or 350 mL (women) would provide LPV to 80% of patients with ALI. CONCLUSIONS: Simple interventions could substantially improve adherence with LPV among patients with ALI and warrant prospective study.
PURPOSE: We assessed factors associated with underuse of lung-protective ventilation (LPV) in patients with acute lung injury (ALI). METHODS: A secondary analysis of Acute Respiratory Distress Syndrome Clinical Trials Network trial data, 1999 to 2005, was conducted. Tidal volumes recorded before trial randomization were analyzed to determine receipt of LPV (tidal volume ≤ 6.5 mL/kg of predicted body weight [PBW]). RESULTS: Of 1385 participants, 430 (31.2%) received LPV. Average tidal volume was 7.65 ± 1.82 mL/kg PBW; measured tidal volumes were greater than "lung-protective" tidal volumes predicted by 6.5 mL/kg PBW (mean difference, 67 ± 108 mL; P < .0001). Multivariate predictors of LPV underuse were older age (odds ratio [OR] per SD year, 1.18; 95% confidence interval [CI], 1.02-1.38), white race (OR, 1.40; 95% CI, 1.05-1.88), shorter stature (OR per SD centimeter, 0.55; 95% CI, 0.48-0.63), lower Simplified Acute Physiology II Score (OR per SD, 0.78; 95% CI, 0.67-0.92), lower lung injury score (OR per SD, 0.83; 95% CI, 0.70-0.95), decreased serum bicarbonate (OR per SD mmol/L, 0.83; 95% CI, 0.71-0.97), shorter preenrollment intensive care unit stay (OR per SD day, 0.84; 95% CI, 0.73-0.98), and use of non-volume-controlled ventilation (OR, 3.07; 95% CI, 1.78-5.27). Setting tidal volumes to 450 mL (men) or 350 mL (women) would provide LPV to 80% of patients with ALI. CONCLUSIONS: Simple interventions could substantially improve adherence with LPV among patients with ALI and warrant prospective study.
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