Preoperative pulmonary function detection in evaluation of postoperative pulmonary complications in patients undergoing abdominal surgery

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Objective To evaluate the effect of preoperative pulmonary function detection in evaluation of postoperative pulmonary complications in patients undergoing abdominal surgery. Methods The clinical data of 162 cases of abdominal operation at our hospital were retrospectively analyzed. Their pulmonary function [forced vital capacity (FVC), forced expiratory volume in one second (FEV1), a second rate (FEV1/FVC), maximal ventilatory volume (MVV), pulmonary diffusing capacity (DLCO), diffusing capacity (DLCO/VA), ratio of lung volume (TLC), residual volume (RV), the residual total ratio (RV/TLC), maximal the amount of oxygen (VO2max), maximal oxygen uptake (VO2max/kg), maximal oxygen pulse (VO2max/HR), the maximum motor power (WRmax)] was measured before operation. After 1 months’ follow-up, the conditions of pulmonary complications were observed. The patients were divided into a pulmonary complication group and non-pulmonary complication group. The differences of lung function between the two groups were compared and analyzed by logistic multivariate analysis. Lung function indexes were drawn to predict the ROC curve of postoperative pulmonary complications. Results The incidence of pulmonary complications was 25.93% in the 162 patients. The FVC, FEV1, VO2max, VO2max/kg, VO2max/HR, and WRmax were lower in the pulmonary complication group than in the non-pulmonary complication group, with statistical differences (P 0.05). Logistic multivariate analysis showed that FVC, FEV1, VO2max, VO2max/kg, VO2max/HR, and WRmax were the independent factors of postoperative pulmonary complications (P < 0.05). FVC, FEV1, VO2max, VO2max/kg, VO2max/HR and WRmax could predict the postoperative pulmonary complications after abdominal operation; and the areas under ROC curve were 0.798, 0.778, 0.812, 0.803, 0.806, and 0.810, respectively. Conclusions FVC, FEV1, VO2max, VO2max/kg, VO2max/HR, and WRmax are the independent influencing factors of postoperative complications. They can be used to assess pulmonary complications after abdominal surgery and have high clinical value. Key words: Abdominal surgery; Preoperative pulmonary function; Postoperative pulmonary complications