| Arterial Blood Gas Changes During Penumonctomy and Lobectomy According to the Inspired O2 Concentration. |
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You Jung Lee, Guie Yong Lee, Choon Hi Lee |
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Department of Anesthesiology, College of Medicine, Ewha Womans University, Seoul, Korea. |
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| Abstract |
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At the Department of Anesthesiology, Ewha Womans University Hospital from June, 1984 to August, 1986, pneumonectomies and lobectomies in 12 patients were performed in the lateral position during two-lung ventilation. 5 patients (group l) were ventilated using a portex endotracheal tube with 50% N2O and 50% O2; 7 patients (greup ll),100% 02. Analysis of artierial blood gases, mean arterial pressure and heart rates were stdudied. Arterial samples were obtained during the following times: (1) preoperative period, (2) the closed-chest in the lateral position, (3) before the ligation of the bronchus in the open-chest, (4) after the ligation of the bronchus in the open.chest and (5) the postoperative period. The results were as follows : (1) In both groups PaO2, gradually decreased during all periods and was not significant. (2) After the ligation of the bronchus in the open-chest, PaO2 values were 199.1+/-64.5 mmHg (group I) and 322.7+/-112.4 mmHg (group ll), There was a significant difference between two groups but without clinical improtance (P < 0.05). We concluded that when pneumonectomy and lobectomy were performed in the lateral position by the use of two-lung ventilation with FiOa, 0.5 or more, PaO2 was maintained satisfactorily during the closed and open christ periods. |
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