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Observational Study
. 2015 Dec;30(6):1163-8.
doi: 10.1016/j.jcrc.2015.07.031. Epub 2015 Aug 1.

Sepsis-associated pulmonary complications in emergency department patients monitored with serial lactate: An observational cohort study

Matthew R Dettmer  1 , Nicholas M Mohr  2 , Brian M Fuller  3
Affiliations
Observational Study

Sepsis-associated pulmonary complications in emergency department patients monitored with serial lactate: An observational cohort study

Matthew R Dettmer et al. J Crit Care. 2015 Dec.

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.

Keywords: ARDS; Emergency department; Lactate; Sepsis.

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