Study And Discussion The Influence Of CO₂ Pneumoperitonum To Arterial Blood Gas Analysis In The Urological Laparoscopic Surgery And The Clinical Treatment

Objective: To study and discuss the influence of CO2 pneumoperitonum to arterial blood gas analysis in the urological laparoscopic surgery and the clinical treatment for it.Methods: 77 patients with urological diseases underwent lapar- oscopic surgery and were divided into 3 groups. Among them 35 cases chose the retroperitioneal approach, 20 cases chose the transperitioneal approach. 5% sodium bicarbonate was given intravenously to 22 cases in 30mins before laparoscopic surgery, 12 of them with retroperitioneal approach,10 with transperitioneal approach. Under total anesthesia the trocars were placed. The CO2 inflation rate was 2 L/min and the pressure was kept between 1.73~1.87kPa (13~14mmHg) during operation. Arterial blood samples were collected for arterial blood gas analysis 5mins be- fore operation, 30mins after the operation began and 30mins of post-operation respectively. Parameters including blood PH, arterial partial pressure of carbon dioxide (PCO2), arterial O2 partial pressure of oxygen (PO2), base excess (BE) were recorded.Results: The average blood PH measured during the laparoscopic surgery in the retroperitioneal approach was 0.14 lower than that measured 5mins before operation (p<0.01). Meantime the average PCO2 increased 26.01mmHg (p<0.01). The average blood PH measured 30mins after operaiton was also 0.06 lower than that measured 5mins before operation (p<0.01). Me- antime the average PCO2 increased 5.63mmHg (p<0.01). The average blood PH measured during the laparoscopic surgery in the transperitioneal approach was 0.23 lower than that mea- sured 5 mins...