BACKGROUND: Evaluate pulmonary function pre and postoperative period of patients submitted to Roux-en-Y gastric bypass by laparotomy and video laparoscopy. METHOD: Between october 2004 until october 2005, 38 patients were submitted to Roux-en-Y gastric bypass, 17 of them (9 woman and 8 man) by laparotomy (age and BMI mean of 32±9,8 years and 47±7,2Kg/m², respectively) and 20 (13 woman and 7 man) by video laparoscopy (age and BMI mean of 35±9,6years and 44±5,9Kg/m², respectively). All of them were submitted to espirometry, blood gas transcutaneous (oximetry) and respiratory frequency monitoring before and after surgery (until the 30th hour) and were also evaluated by a modified pain visual analogic scale (VAS) at the espirometry. RESULTS: In pre-operative, all patients presented normal pulmonary function tests. We observed a significant mean reduction of 38,5% in FVC, 39,11% in FEV1 and 37% in PEF in laparotomy group (LG). In the video laparoscopy group (VG) there was a mean reduction of 38.37% in FVC, 35.53% in FEV1 and 41.57% in PEF. The respiratory frequency had a mean increase of 16.98 and 14.79% in LG and VG respectively, both with statistic significance. The mean operating time was 179±17,7 minutes in LG and 163,4±14,5 minutes in VG. Pain scores were 3.5 in LG and 3.40 in VG. The incidence of post-operatory complications was about 2%. CONCLUSION: We concluded that the patients with degree 2 or morbid obesity presented normal espirometry values in pre-operative and, after being submitted to gastric bypass technique (laparotomy or videolaparoscopy), they developed an espirometric standard compatible with pulmonary restriction in early post-operative.
Respiratory Function Tests; Preoperative Care; Obesity; Morbid; Obesity; Bariatric surgery
