TITLE:
Predictors of Gallstone Formation in Morbidly Obese Patients after Bariatric Surgery: A Retrospective Observational Study
AUTHORS:
Mohammad H. Abo-Ryia, Hamdy S. Abd-Allah, Osama H. El-Khadrawy, Gamal I. Moussa
KEYWORDS:
Obesity; Gallstone; Bariatric Surgery
JOURNAL NAME:
Surgical Science,
Vol.5 No.1,
January
9,
2014
ABSTRACT: Background: Obesity alone and rapid weight loss induced by bariatric surgery are
recognized risk factors for the development of cholelithiasis. This study aimed
to identify the predictive factors for gallstone formation after bariatric
surgery. Patient and methods: The files of all morbidly
obese patients underwent bariatric surgery in our unit during the period from
March 2003 till October 2010 were reviewed and analyzed. All patients underwent
routine preoperative ultrasonography and selective concomitant cholecystectomy
was done in all patients with ultrasonographic-confirmed cholelithiasis. After
excluding cases with prior and concomitant cholecystectomies, patients were divided
into two groups; those who developed gallstones and those who did not and the
two groups were compared. Results: Of the 143
reviewed files 135 were eligible to be included in the study. The incidence of
cholelithiasis before surgery was 25.9% (35 cases). 19 cases (19%) of the 100
cases free at surgery developed gallstone at a mean of 13.2 months. Comparing
the two groups, no significant
difference was revealed regarding gender, age, preoperative BMI or type
of the operation. But the percent of excess weight loss was significantly
higher in the group that formed gallstones. Conclusion: Gender, age, preoperative BMI and type of the
operation were not predictive of gallstones formation after bariatric surgery.
The percent of excess weight loss was the only predictive postoperative factor.