Use of medical emergency team responses to reduce hospital cardiopulmonary arrests.

BACKGROUND Medical emergency team (MET) responses have been implemented to reduce inpatient mortality, but data on their efficacy are sparse and there have been no reports to date from US hospitals. OBJECTIVES To determine how the incidence and outcomes of cardiac arrests have changed following increased use of MET. METHODS Objective criteria for MET activation were created and disseminated as part of a crisis management program, after which there was a rapid and sustained increase in the use of MET. A retrospective analysis of clinical outcomes was performed to compare the incidence and mortality of cardiopulmonary arrest before and after the increased use of MET. RESULTS A retrospective analysis of 3269 MET responses and 1220 cardiopulmonary arrests over 6.8 years showed an increase in MET responses from 13.7 to 25.8 per 1000 admissions (p<0.0001) after instituting objective activation criteria. There was a coincident 17% decrease in the incidence of cardiopulmonary arrests from 6.5 to 5.4 per 1000 admissions (p = 0.016). The proportion of fatal arrests was similar before and after the increase in use of MET. CONCLUSIONS Increased use of MET may be associated with fewer cardiopulmonary arrests.