Association of small adult ventilation bags with return of spontaneous circulation in out of hospital cardiac arrest.

Introduction: Little is known about the impact of tidal volumes delivered by emergency medical services (EMS) to adult patients with out-of-hospital cardiac arrest (OHCA). A large urban EMS system changed from standard adult ventilation bags to small adult bags. We hypothesized that the incidence of return of spontaneous circulation (ROSC) at the end of EMS care would increase after this change.

Increase in end-tidal carbon dioxide after defibrillation predicts sustained return of spontaneous circulation during out-of-hospital cardiac arrest.

Introduction: Guidelines recommend monitoring end-tidal carbon dioxide (ECO) during out-of-hospital cardiac arrest (OHCA), though its prognostic value is poorly understood. This study investigated the relationship between ECO and return of spontaneous circulation (ROSC) after defibrillation in intubated non-traumatic OHCA patients.

Methods: This retrospective, observational cohort analysis included adult OHCA patients who received a defibrillation shock during treatment by an urban EMS agency from 2015 to 2021.