Bowel habits after bariatric surgery

Area of Science:

• Bariatric Surgery
• Gastroenterology
• Quality of Life Research

Background:

• Disordered bowel habits can negatively impact post-bariatric surgery quality of life.
• Different bariatric procedures (AGB, RYGB, BPD) may uniquely alter bowel function.
• The differential impact of these procedures on bowel habits and quality of life remains unclear.

Purpose of the Study:

• To investigate the specific effects of adjustable gastric banding (AGB), Roux-en-Y gastric bypass (RYGB), and biliopancreatic diversion (BPD) on bowel habits.
• To determine how these changes in bowel habits influence patients' quality of life after surgery.
• To compare the incidence and severity of altered bowel habits and flatulence across the three surgical groups.

Main Methods:

• A cohort of 290 severely obese patients undergoing AGB, RYGB, or BPD between 1996 and 2004 were studied.
• Post-operative changes in bowel habits, flatulence, flatus odor, and social impact were assessed using a self-administered questionnaire at least 4 months after surgery.
• Statistical analyses were performed to compare outcomes between the surgical groups.

Main Results:

• Significant changes in fecal consistency were observed, with loose stools and diarrhea more frequent after BPD and RYGB compared to AGB.
• Constipation was more prevalent following AGB.
• Malodorous flatus and increased flatus frequency were more common after BPD and RYGB, significantly impacting social life and correlating inversely with quality of life (BAROS scores) in these groups.

Conclusions:

• The type of bariatric surgery dictates specific changes in bowel habits, leading to diarrhea (BPD, RYGB) or constipation (AGB).
• Flatulence severity is a significant factor affecting quality of life, with the greatest impact seen after BPD, followed by RYGB, and least after AGB.
• While overall quality of life scores (BAROS) were similar, the impact of flatulence on quality of life was operation-specific.