0554 PSG AND CPAP USE BEFORE AND AFTER BARIATRIC SURGERY: A FIVE YEAR COHORT STUDY

Abstract Introduction: Studies have showed that nearly 100% of morbidly obese men and 60–70% of women have obstructive sleep apnea (OSA). A polysomnography (PSG) study is used to establish the diagnosis and parameters for continuous positive airway pressure (CPAP) therapy. PSG is commonly recommended prior to bariatric surgery to assess for the presence of OSA and possible anesthetic complications. After surgery patients are to continue CPAP until a repeat sleep study is done to re-evaluate the need for CPAP. Currently there are not many studies that look at the prevalence of CPAP in the pre/post-op period in minority patients in an urban tertiary care center. Methods: Observational cohort study of morbidly obese patients who had polysomnography (PSG), received diagnosis of OSA and were prescribed CPAP treatment prior to bariatric surgery. Follow-up was done at 5 years post procedure. Results: From 2010–2011, 121 patients had PSG prior to bariatric surgery at Brookdale Hospital. 100 patients were female and 21 were male. 70 of patients were black, 42 patients were Hispanic, and 8 were other ethnicities. 61 patients used CPAP consistantly prior to surgery. In the group using CPAP average age was 36.7 years and BMI was 49.8. The non-compliant group had an average age of 39.7 years and BMI of 48.0. None of the patients in the study had immediate complications post-surgical procedure. After 5 years, 15 patients continued to use CPAP and 2 patients in this group had a repeat PSG after surgery. Chi-squared and student t-test were used to analyze sex, age, ethnicity, BMI and there were no statistically significant differences between the two groups. Conclusion: Our study showed that there was no correlation between OSA and post-op complications which calls into question the need for PSG prior to bariatric surgery. Roughly half of the patients were compliant with CPAP prior to surgery and only 2 patients followed up for a repeat PSG. Possible reasons for lack of compliance with therapy include nasal discomfort, cost and lack of knowledge. More studies need to be done regarding the utility of PSG before and after bariatric surgery. Support (If Any): None.