Incidence and Risk Factors for Cholelithiasis After Bariatric Surgery

Area of Science:

• Gastroenterology
• Bariatric Surgery Outcomes
• Gallstone Epidemiology

Background:

• Obesity and rapid weight loss post-bariatric surgery (BS) are known risk factors for gallstones (cholelithiasis, CL).
• Gallstones are a prevalent condition in the Chilean population.
• Identifying specific risk factors for CL post-BS is crucial for patient management.

Purpose of the Study:

• To determine the incidence of gallstones in obese Chilean patients 12 months after bariatric surgery.
• To identify risk factors associated with gallstone development following bariatric surgery.

Main Methods:

• Retrospective analysis of 176 obese Chilean patients who underwent bariatric surgery in 2014.
• Inclusion criteria: negative preoperative ultrasound for gallstones and at least 12 months follow-up.
• Abdominal ultrasound at 6 and 12 months post-surgery; analysis of clinical and surgical variables.

Main Results:

• Gallstones were detected in 36.9% of patients at 12 months post-bariatric surgery.
• No significant increase in gallstone risk was associated with excess BMI loss or other studied variables.
• Hypertension was found to be protective against gallstone occurrence (OR 0.241).

Conclusions:

• Gallstone incidence is substantial, affecting up to one-third of patients within a year after bariatric surgery.
• Excessive weight loss did not emerge as a risk factor for gallstones in this cohort.
• The protective effect of hypertension against gallstone formation requires further research.