Background and Goal of Study: Obstructive sleep apnea syndrome (OSAS) is present in 44% of patients scheduled for bariatric surgery. Associated respiratory problems to OSAS are related to overlapping condition (COPD) and/or obesity hypoventilation syndrome (OHS). The aim of our study was to know the influence of long-term weight loss in the respiratory comorbidities associated to obesity.
Material and Methods: We have followed all patients scheduled for open Roux-Y gastric bypass plus gastroplasty with respiratory co-morbidity during a five-year period. Patients who were positive on polisomnographic studies and required CPAP treatment prior surgery were included. All patients were managed by the same anaesthetic and surgery protocols. One year after the procedure, we performed polysomnographic studies, arterial blood gases and pulmonary function tests to all patients.
Results and Discussion: From 209 patients scheduled for bariatric surgery during the study period, 105 patients had respiratory co-morbidity. Of them, 30 patients needed CPAP-BiPAP treatment before surgery, which were included in our study. Main results are expressed on the table.
Conclusions: The weight lost obtained after bariatric surgery improved arterial blood gases values, respiratory test and polysomnographic results. Therefore, we were able to retire CPAP treatment in most of patients.