Matthew R Dettmer1, Nicholas M Mohr2, Brian M Fuller3. 1. Division of Critical Care Medicine, Department of Medicine, Cooper Medical School of Rowan University, Cooper University Hospital, Camden, NJ 08103. Electronic address: dettmer-matthew@cooperhealth.edu. 2. Department of Emergency Medicine, Roy J. Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242; Division of Critical Care, Department of Anesthesia, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242. Electronic address: nicholas-mohr@uiowa.edu. 3. Division of Emergency Medicine, Washington University School of Medicine in St Louis, St Louis, MO 63110; Division of Critical Care, Department of Anesthesiology, Washington University School of Medicine in St Louis, St Louis, MO 63110. Electronic address: fullerb@wusm.wustl.edu.
Abstract
PURPOSE: Patients with severe sepsis and septic shock are at high risk for development of pulmonary complications, including acute respiratory distress syndrome (ARDS). Serial lactate monitoring is a useful tool to gauge global tissue hypoxia in emergency department (ED) patients with sepsis. We hypothesized that patients undergoing serial lactate monitoring (SL) would demonstrate a decreased incidence of pulmonary complications. METHODS: This is a retrospective observational cohort study of adult severe sepsis and septic shock patients with elevated lactate presenting to a large academic ED. A total of 243 patients were assigned to SL (n=132) or no serial lactate monitoring (NL; n=111). The primary outcome was a composite of pulmonary complications: (1) ARDS development and (2) respiratory failure. RESULTS: Twenty-eight patients (21%) in the SL group and 37 patients (33%) in the NL group developed the primary outcome (P=.03). Multivariate analysis demonstrated an association between the NL group and development of pulmonary complications (adjusted odds ratio [aOR], 2.1; confidence interval [CI], 1.15-3.78). Emergency department mechanical ventilation was independently associated with development of ARDS (aOR, 3.5; 1.8-7.0). In the a priori subgroup of patients mechanically ventilated in the ED (n=97), those who developed ARDS received higher tidal volumes compared to patients who did not develop ARDS (8.7 mL/kg predicted body weight [interquartile range, 7.6-9.5] vs 7.6 [interquartile range, 6.8-9.0]; P<.01). CONCLUSIONS: Serial lactate monitoring is associated with a decrease in major pulmonary complications in severe sepsis and septic shock. Acute respiratory distress syndrome incidence is also influenced by ED-based mechanical ventilation. These results provide 2 potentially modifiable variables to be targeted in future studies to prevent pulmonary complications in this patient subset.
PURPOSE:Patients with severe sepsis and septic shock are at high risk for development of pulmonary complications, including acute respiratory distress syndrome (ARDS). Serial lactate monitoring is a useful tool to gauge global tissue hypoxia in emergency department (ED) patients with sepsis. We hypothesized that patients undergoing serial lactate monitoring (SL) would demonstrate a decreased incidence of pulmonary complications. METHODS: This is a retrospective observational cohort study of adult severe sepsis and septic shockpatients with elevated lactate presenting to a large academic ED. A total of 243 patients were assigned to SL (n=132) or no serial lactate monitoring (NL; n=111). The primary outcome was a composite of pulmonary complications: (1) ARDS development and (2) respiratory failure. RESULTS: Twenty-eight patients (21%) in the SL group and 37 patients (33%) in the NL group developed the primary outcome (P=.03). Multivariate analysis demonstrated an association between the NL group and development of pulmonary complications (adjusted odds ratio [aOR], 2.1; confidence interval [CI], 1.15-3.78). Emergency department mechanical ventilation was independently associated with development of ARDS (aOR, 3.5; 1.8-7.0). In the a priori subgroup of patients mechanically ventilated in the ED (n=97), those who developed ARDS received higher tidal volumes compared to patients who did not develop ARDS (8.7 mL/kg predicted body weight [interquartile range, 7.6-9.5] vs 7.6 [interquartile range, 6.8-9.0]; P<.01). CONCLUSIONS: Serial lactate monitoring is associated with a decrease in major pulmonary complications in severe sepsis and septic shock. Acute respiratory distress syndrome incidence is also influenced by ED-based mechanical ventilation. These results provide 2 potentially modifiable variables to be targeted in future studies to prevent pulmonary complications in this patient subset.
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