STUDY OBJECTIVE: To synthesize the evidence on the effect of a bolus dose of etomidate on adrenal function, mortality, and health services utilization compared with other induction agents used for rapid sequence intubation. METHODS: We developed a systematic search strategy and applied it to 10 electronic bibliographic databases. We hand searched journals; reviewed conference proceedings, gray literature, and bibliographies of relevant literature; and contacted content experts for studies comparing a bolus dose of etomidate with other induction agents. Retrieved articles were reviewed and data were abstracted with standardized forms. Data were pooled with the random-effects model if at least 4 clinically homogenous studies of the same design reported the same outcome measure. All other data were reported qualitatively. RESULTS: From 3,083 titles reviewed, 20 met our inclusion criteria. Pooled mean cortisol levels were lower in elective surgical patients induced with etomidate compared with those induced with other agents between 1 and 4 hours postinduction. The differences varied from 6.1 microg/dL (95% confidence interval [CI] 2.4 to 9.9 microg/dL; P=.001) to 16.4 microg/dL (95% CI 9.7 to 23.1 microg/dL; P<.001). Two studies in critically ill patients reported significantly different cortisol levels up to 7 hours postinduction. None of the studies reviewed, nor our pooled estimate (odds ratio 1.14; 95% CI 0.81 to 1.60), showed a statistically significant effect on mortality. Only one study reported longer ventilator, ICU, and hospital lengths of stay in patients intubated with etomidate. CONCLUSION: The available evidence suggests that etomidate suppresses adrenal function transiently without demonstrating a significant effect on mortality. However, no studies to date have been powered to detect a difference in hospital, ventilator, or ICU length of stay or in mortality. 2009 American College of Emergency Physicians. Published by Mosby, Inc. All rights reserved.
STUDY OBJECTIVE: To synthesize the evidence on the effect of a bolus dose of etomidate on adrenal function, mortality, and health services utilization compared with other induction agents used for rapid sequence intubation. METHODS: We developed a systematic search strategy and applied it to 10 electronic bibliographic databases. We hand searched journals; reviewed conference proceedings, gray literature, and bibliographies of relevant literature; and contacted content experts for studies comparing a bolus dose of etomidate with other induction agents. Retrieved articles were reviewed and data were abstracted with standardized forms. Data were pooled with the random-effects model if at least 4 clinically homogenous studies of the same design reported the same outcome measure. All other data were reported qualitatively. RESULTS: From 3,083 titles reviewed, 20 met our inclusion criteria. Pooled mean cortisol levels were lower in elective surgical patients induced with etomidate compared with those induced with other agents between 1 and 4 hours postinduction. The differences varied from 6.1 microg/dL (95% confidence interval [CI] 2.4 to 9.9 microg/dL; P=.001) to 16.4 microg/dL (95% CI 9.7 to 23.1 microg/dL; P<.001). Two studies in critically illpatients reported significantly different cortisol levels up to 7 hours postinduction. None of the studies reviewed, nor our pooled estimate (odds ratio 1.14; 95% CI 0.81 to 1.60), showed a statistically significant effect on mortality. Only one study reported longer ventilator, ICU, and hospital lengths of stay in patients intubated with etomidate. CONCLUSION: The available evidence suggests that etomidate suppresses adrenal function transiently without demonstrating a significant effect on mortality. However, no studies to date have been powered to detect a difference in hospital, ventilator, or ICU length of stay or in mortality. 2009 American College of Emergency Physicians. Published by Mosby, Inc. All rights reserved.
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