title: Gastric insufflation during IAC-CPR and standard CPR in a canine model.
abstract: This study was undertaken to determine the effect of interposed abdominal compressions (IAC) during cardiopulmonary resuscitation (CPR) on gastric insufflation when the airway is not secured with an endotracheal tube. A canine model was used in which a common ventilation pressure was applied to separate cuffed esophageal and tracheal tubes. Gas entering the stomach was collected by a pre-placed gastrostomy tube leading to a bell spirometer. Gas entering the lungs was measured with a Wright Respirometer in series with the endotracheal tube. During standard CPR, measurable gastric gas volume was collected in 28 of 30 trials (mean 215 +/- 93 ml/ventilation). During IAC-CPR, in which abdominal pressure was maintained during ventilation after every 5th chest compression, measurable gastric gas was collected in 15 of 30 trials (mean 40 +/- 11 ml/ventilation). Interposed abdominal compressions as an adjunct to standard CPR may not only be of hemodynamic benefit, but may also reduce the incidence of gastric insufflation and attendant complications.
mesh_terms: D000005:Abdomen; D000818:Animals; D001794:Blood Pressure; D004285:Dogs; D005740:Gases; D011175:Positive-Pressure Respiration; D011312:Pressure; D012151:Resuscitation / Q000379:methods*; D013270:Stomach / Q000502:physiology*; D013990:Tidal Volume
chemical_list: D005740:Gases