The Effect Of Two Types Of Mechanical Ventilation Modes On Obese Patients Oxygenation Index Changes

Objective: To compare the obese patients undergoing general anesthesia respectively by the PCV and the VCV ventilation mode, effect on arterial oxygenation.Methods: 40 cases of general anesthesia operation in obese patients, randomly divided into pressure control ventilation group(PCV) and volume controlled ventilation(VCV) group, 20 cases in each group. End tidal carbon dioxide partial pressure maintained at between 35-45 mm Hg. 30 minutes before operation(T0), operation began 30 minutes(T1), operation began 60 minutes after the end of operation(T2),(T3),(T4) blood gas analysis. Monitoring and computational hemodynamics index.Results: 1. patients in the two groups in general, no significant difference(p>0.05) 2. as compared with VCV group, the PCV group of Pa O2, OI were higher than VCV group at T1, T2, T3(p<0.05).Conclusion: compared with VCV, PCV improved ventilation perfusion ratio anesthesia in obese patients, to promote gas exchange.