The value of pulmonary function testing prior to bariatric surgery

Abstract

Background: Pulmonary function tests (PFTs) are often abnormal in the morbidly obese and improve after bariatric surgery. Our aim was to determine the utility of obtaining preoperative PFTs in assessing postoperative risk. Methods: 146 consecutive patients undergoing open bariatric surgery were analyzed. Patients were divided into those who had postoperative complications (Group A, n=27) and those who did not (Group B, n=119). PFTs and BMI were compared between Groups A and B. PFT parameters are reported as the median percentage of age-matched controls. Results: Patients in Group A compared to Group B were heavier (BMI 58 vs 51 kg/m2, P=.001) and older (46 vs 40 years, P=.02) than those in group B. They had reduced forced vital capacity (80% vs 97%, P 40 years, P=.01). Conclusions: PFTs help to predict complications after bariatric surgery. The greatest reduction in VC may occur in patients with central obesity, reflecting increased intrabdominal pressure and diminished chest wall compliance. © FD-Communications Inc.