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Bystander mouth-to-mouth ventilation and regurgitation during cardiopulmonary resuscitation.

Virkkunen I, Kujala S, Ryynänen S, Vuori A, Pettilä V, Yli-Hankala A, Silfvast T

Department of Anaesthesia, Tampere University Hospital, Tampere, Finland. ilkka.virkkunen@uta.fi

OBJECTIVES: To determine whether there is an association between bystander mouth-to-mouth ventilation and regurgitation in prehospital cardiac arrest patients. DESIGN: Prospectively conducted observational study. SETTING: Data were collected from patients treated by the emergency medical service (EMS) systems in three middle-sized or large Finnish urban communities, the Tampere District EMS and the physician-staffed Helicopter EMSs in the Helsinki and Turku areas in southern Finland. SUBJECTS: The study population consisted of 529 consecutive prehospital cardiac arrest patients with attempted resuscitation. Exclusion criteria were cardiac arrest due to trauma or drug overdose. MAIN OUTCOME MEASURES: Regurgitation in prehospital cardiac arrest patients documented by EMS personnel on the scene. RESULTS: Regurgitation occurred in a fourth of patients. Bystander cardiopulmonary resuscitation (CPR) with mouth-to-mouth ventilation was associated with a significantly increased risk of regurgitation compared with no CPR (P < 0.013) and CPR without ventilations (P < 0.01). CONCLUSIONS: The mode and role of bystander CPR in cardiac arrest needs to be further evaluated.

Published 22 June 2006 in J Intern Med, 260(1): 39-42.
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