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When applied properly, mechanical devices provide consistent and effective chest compressions; no risk for provider fatigue; and the opportunity for concurrent defibrillation, thereby reducing time to shock. Investigators performed a meta-analysis of controlled (randomized, historical, or case-control) trials in humans to compare prehospital cardiopulmonary resuscitation (CPR) using a mechanical chest compression device versus manual compressions.
Of 12 studies meeting entry criteria, 8 involved load-distributing band CPR and 4 used piston-driven CPR, with a total of 6538 patients and 1824 instances of return of spontaneous circulation (ROSC). ROSC was defined as a measurable blood pressure sustained for at least 1 minute. Use of a mechanica…