The Effect Of Alveolar Recruitment Maneuver And Positive-end Expiratory Pressure On Respiratory Function Of Obese Patients Undergoing General Anesthesia

Objective:To investigate the effect of alveolar recruitment maneuver and positive end-expiratory pressure on respiratory function of obese patients undergoing general anesthesia.Methods:40obese patients undergoing myomectomy or hysterectomy were randomly devided into alvelar recruitment maneuver group and control group,20cases in each group.after intubation the RM group received alveolar recruitment maneuver,which was followed by ventilation with positive end-expiratory pressure,the patients in the control group were ventilated in a standard volume control fashion without alveolar recruitment maneuver and positive end-expiratory pressure.At the begining of incision(Tl),30min after incision(T2),60min after incision(T3),Parameters were monitored including heart rate,mean arterial pressure,oxygenation index,airway plateau pressure and total respiratory dynamic compliance.At10min after extubation(T4) heart rate,mean arterial pressure and oxygenation index were monitored.Result:Compared with control group,oxygenation index in group RM was higher at T1,T2,T3,T4(P<0.05).compared with control group,airway plateau pressure and total respiratory dynamic compliance in group RM was higher at T1,T2,T3(P<0.05).compared with control group,heart rate and mean arterial pressure had no statistically significant difference at T1,T2,T3,T4.Conclusion:Alveolar recruitment maneuver and positive end-expiratory pressure could improve the alveolar oxygenation of obese patients undergoing general anesthesia without affecting heart rate and mean arterial pressure.