The Study Of Evaluated Maximum Oxygen Consumption Early After Lung Resection In High Altitude

Objective: To identify the predictors of underestimation and overestimation of lung postoperative maximum oxygen consumption (Vo₂max) in high altitude.Methods: Cardiopulmonary exercise testing was performed on 71 patients who had 17 pneumonectomies, 44 lobectomies, and 10 segmentctomies. All patients performed a preoperative and postoperative (10.1 days after surgery )maximal stair-climbing test. Predicted postoperative Vo₂max (Vo₂maxppo)was calculated on the basis of the number of functioning segments removed during operation. The patients were divided into three groups: group A (45 cases) with a Vo₂maxppo within 1 standard deviation of the observed postoperative Vo₂max; group B (19cases) with a difference between the observed postoperative Vo₂max and Vo₂maxppo greater than 1 standard deviation (underestimation); and group C (7cases) with a difference between Vo₂maxppo and the observed postoperative Vo₂max greater than 1 standard deviation (overestimation).