Gallstones after bariatric surgery: mechanisms and prophylaxis

Area of Science:

• Bariatric Surgery
• Gastroenterology
• Hepatology

Background:

• Gallstones are a common complication after bariatric surgery, with incidence rates varying widely (10.4%-52.8%) within the first year.
• Multiple factors contribute, including vagal nerve injury, altered bile composition, reduced intake, hormonal shifts, and gut dysbiosis.
• Sleeve gastrectomy (SG) generally has a lower gallstone incidence than Roux-en-Y gastric bypass (RYGB).

Purpose of the Study:

• To review the incidence, contributing factors, and prevention strategies for gallstones following bariatric surgery.
• To discuss the role of surgical technique, pharmacological interventions, and dietary measures in gallstone prevention.
• To highlight the need for standardized prophylactic protocols in bariatric surgery patients.

Main Methods:

• Literature review of studies on gallstone formation post-bariatric surgery.
• Analysis of risk factors associated with different surgical procedures (SG vs. RYGB).
• Evaluation of prophylactic interventions including cholecystectomy, ursodeoxycholic acid (UDCA), dietary changes, and probiotics.

Main Results:

• Incidence of gallstones post-bariatric surgery ranges from 10.4% to 52.8%.
• Ursodeoxycholic acid (UDCA) is effective in preventing gallstones, but optimal protocols are debated.
• Probiotics show promise as an adjunct or alternative to UDCA for preventing gallstones.

Conclusions:

• Gallstone prevention post-bariatric surgery requires tailored strategies considering surgical type and patient factors.
• Further research is needed to establish standardized, evidence-based prophylactic protocols.
• Emerging options like probiotics offer a patient-friendly approach to managing gallstone risk.