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Objective: gynecological laparoscopic surgery, comparing different pressure control ventilation (PCV) mode pneumoperitoneum ventilatory function in patients with and CO 2 partial pressure. Methods: 45 patients with ASA physical status I or II, age 20 to 60 years old, weighing 45 ~ 65kg, contemplated in total intravenous anesthesia in gynecological laparoscopic elective surgery (surgery time about 2h) patients were randomly divided into A , B, C three groups, with 15 cases each. Intraoperative mechanical ventilation PCV mode, after the termination of the gas abdominal pneumoperitoneum set airway pressure 10cmH2O, respiratory rate of 14 beats / min; pneumoperitoneum established three groups A, B, C airway pressure adjustment for 18cmH2O 16cmH2O 14cmH2O, ventilation frequency adjustment to 12 beats / min, 14 beats / min, 16 beats / min. Intraoperative anesthesia was maintained constant infusion are propofol target-controlled infusion of remifentanil. 5min (T4) four time points respectively before pneumoperitoneum (T1), 30min (T2), 60min (T3) after pneumoperitoneum after pneumoperitoneum pneumoperitoneum stop collecting arterial blood gas analysis, and recording at the same time and calculated moisture volume, minute ventilation, Chest compliance PetCO 2 and Pa-etCO 2 gradient. Results: group: and pneumoperitoneum ago, after the termination of pneumoperitoneum compared pneumoperitoneum ventilation, Chest compliance and pH values ??were decreased, CO 2 partial pressure was significantly higher; with pneumoperitoneum than before, after the termination of the pneumoperitoneum ventilation and chest compliance little change over the previous the CO 2 partial pressure was increased, the pH value decreased; With pneumoperitoneum time extended little ventilation and pH fluctuations, tuberculosis and chest compliance is decreasing, CO 2 partial pressure upward trend. Pa-etCO 2 gradient before pneumoperitoneum gas abdominal no difference began to increase after the termination of pneumoperitoneum, before pneumoperitoneum the PetCO 2 and PaCO 2 there is a good correlation, the correlationship weakened after the termination of pneumoperitoneum. Between groups: the first three groups of the monitoring indicators of pneumoperitoneum differences; pneumoperitoneum tidal volume group A gt; B group gt; C Group, Chest compliance group A lt; B Group C Group, CO 2 partial pressure of A Group B Group lt; C group, minute ventilation, Pa-etCO 2 gradient and the pH value was no significant difference; termination of pneumoperitoneum the CO 2 < / sub> 2 gradient group A, group B lt; divided the pressure and Pa-etCO, C group, ventilation, Chest compliance and the pH value was no significant difference. Conclusion: The gynecological laparoscopic surgery, mechanical ventilation with PCV mode, set when the pneumoperitoneum pressure of 16cm H2O, respiratory rate of 14 beats / min, which is both preventable lung bruised the also beneficial CO 2 discharge.
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