The purpose of this study was to assess the effects of a standard self-inflating bag compared with the new pressure-responsive, inspiratory gas flow limiting device on airway pressure in adult supine patients undergoing routine induction of anesthesia (supine apneic patients in order to simulate a respiratory arrest patient). Patients & Methods: Eighty healthy adult ASA physical status I and H patients with no respiratory disease (age, 20-61 yr), scheduled for elective peripheral musculoskeletal surgery with general anesthesia, were enrolled into two equal groups, group A were patients ventilated with bag-valve mask (BVM) and group B were patients ventilated with one bag-valve-mask device SMART BAG®. Results: The base line Characteristics of the patients before induction of anesthesia there were no significant differences in age, weight, height, body mass index, Male/ Female ratio and ASA 1/11 in patients between both groups. The peak airway pressure in group B (SMART BAG) was lower than in group A (Standard BVM) (P<0.0001) very high significant There were 4 cases of audible airflow to the stomach in (group A) and no cases in (group B) (P<0.001) high significant difference. Conclusion: Ventilation of supine apneic patients in order to simulate a respiratory arrest patient using SMART BAG during induction of anesthesia resulted in significantly decreased peak airway pressure than using Standard bag valve mask. Stomach insufflation was more frequent with ventilation using Standard bag valve mask. Ventilation was adequate in all patients using both techniques |
