Does a History of Abdominal Surgery Affect Weight Loss Surgery Outcomes?
A study published in the journal Surgery looked at over 3,200 people who had weight loss surgery and found that weight loss results were comparable for patients regardless of whether they had previous abdominal surgery. However, people who had undergone major previous abdominal surgery did experience higher rates of certain complications during and after their procedure.
Who Was in the Study and How It Was Conducted
Researchers reviewed 3,202 patients who had weight loss surgery at a single specialist centre between January 2008 and December 2023. Patients were divided into three groups: those with no previous abdominal surgery, those with minor previous abdominal surgery, and those with major previous abdominal surgery. Data covering outcomes over five years was collected for each patient.
What the Researchers Found
Weight loss outcomes were broadly similar across all three groups. However, patients who had major previous abdominal surgery had a higher chance of needing additional steps during the operation, and sleeve gastrectomy (keyhole surgery to reduce the size of the stomach) took longer in this group. After surgery, people with a history of abdominal operations had higher rates of some complications, including small bowel obstructions (blockages in the small intestine) and early strictures (narrowing at join sites). Around half of all patients in the study, about 5 in 10, had undergone at least minor previous abdominal surgery.
What This Study Does and Does Not Tell Us
The findings suggest that a detailed surgical history matters when planning weight loss surgery, as it can help guide which procedure is chosen and how the operation is prepared for. Because this was a single centre study, the results may not apply in every clinical setting, and outcomes vary from person to person.
About this research: Impact of previous abdominal surgeries on metabolic and bariatric surgery outcomes, Surgery, 2026. Read the study summary
More about the procedures covered in this research is on our bariatric surgery page. If you are considering your options, call us on (03) 9760 2777 or request an appointment through our website.