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- Title
Obstructive Sleep Apnea and Non-alcoholic Fatty Liver Disease in Obese Patients Undergoing Bariatric Surgery.
- Authors
Schwenger, Katherine J. P.; Ghorbani, Yasaman; Li, Carrie; Fischer, Sandra E.; Jackson, Timothy D.; Okrainec, Allan; Allard, Johane P.
- Abstract
Background: Morbid obesity is associated with multiple comorbidities including obstructive sleep apnea (OSA) and non-alcoholic fatty liver disease (NAFLD). It has been suggested that OSA may contribute to NAFLD pathogenesis due to intermittent nocturnal hypoxia. Purpose: The objective of this study was to assess the apnea-hypopnea index (AHI) and lower minimum oxygen saturation, markers of OSA, in patients undergoing bariatric surgery (BSx) with perioperative liver biopsy to detect NAFLD. Methods: This was a single center cross-sectional study of 61 patients undergoing BSx who consented to have a perioperative wedged liver biopsy. Biochemical, clinical, anthropometric variables, and a sleep study test were performed prior to BSx. Results: NAFLD was diagnosed in 49 (80.3%) patients; 12 had normal liver (NL). Those with NAFLD had significantly higher (p < 0.05) AST (42.6 vs 18.1 U/L) and ALT (35.0 vs 22.1 U/L) but similar clinical, anthropometric, and metabolic parameters to NL. There was a higher AHI (32.03 vs 14.35) and significantly lower minimum oxygen saturation (SaO2) (78.87 vs 85.63) in NAFLD compared with NL (p < 0.05). When assessing associations between OSA parameters and liver histology in NAFLD, AHI correlated significantly with lobular inflammation (p < 0.05). In a multivariate analysis, BMI was significantly correlated with lobular inflammation with mean SaO2 nearing significance. Conclusions: These results indicate that in a homogeneous bariatric population sample with similar characteristics, those with NAFLD had higher AHI and lower minimum SaO2 compared with NL. AHI correlated with liver inflammation suggesting a potential role for intermittent nocturnal hypoxia in the pathogenesis and progression of NAFLD.
- Subjects
FATTY liver; LIVER surgery; SLEEP apnea syndromes; LIVER histology; BARIATRIC surgery; HEPATITIS; MORBID obesity
- Publication
Obesity Surgery, 2020, Vol 30, Issue 7, p2572
- ISSN
0960-8923
- Publication type
Article
- DOI
10.1007/s11695-020-04514-3