Influence of PEEP on End-expiratory Lung Volume and Degree of Oxygenation during Anesthesia

Objective To evaluate the value of setting PEEP on end-expiratory lung volume and the degree of oxygenation during anesthesia,providing basis for clinical settings and improving treatment.Methods Totally 26 patients were carried open heart surgery anesthesia with acute respiratory distress syndrome (ARDS) catheterization ventilation.Optimal PEEP was decided according to oxygenation,the slow,continuous incremental PEEP (manual control) and the estimated maximum oxygen transport,to meet or restore pulmonary arterial compliance.Results With the increase of PEEP pressure,PO2 levels rising,and reach maximum pressure is 0.9,the differences among the groups was statistically significant.The level of the body in patients with CI decreased with the increase of pressure,the PEEP was 0.9kPa DO2 levels between each group did not change significantly.Compared to 0KPa group,PEEP increasing significantly in 1.6kPa (P0.05 ).Conclusion PaO2 increased PEEP treatment of ARDS undergoing open heart surgery patients,but will droped when PEEP pressure was high.Therefore,the method should be used gradually increased,according to the specific conditions of patients to determine the optimal PEEP value.