Analysis of Risks associated with Weight Loss Surgery (by SAS Journal team)
Weight loss surgery, or bariatric surgery, is a medical intervention that assists individuals with significant obesity in losing weight. While it can be effective, it’s important to understand the associated risks and potential complications.
Types of Weight Loss Surgery:
- Gastric Bypass: Involves creating a small pouch from the stomach and connecting it directly to the small intestine.
- Sleeve Gastrectomy: Removes a portion of the stomach, leaving a tube-like structure.
- Adjustable Gastric Banding: This involves placing a band around the upper part of the stomach to create a small pouch.
- Biliopancreatic Diversion with Duodenal Switch: Involves a more extensive procedure that reduces the size of the stomach and bypasses a significant portion of the small intestine.
Potential Risks and Complications:
- Surgical Risks:
- Excessive Bleeding: As with any surgery, there is a risk of bleeding during or after the procedure.
- Infection: Postoperative infections can occur at the incision site or internally.
- Adverse Reactions to Anesthesia: Complications related to anaesthesia are possible.
- Blood Clots: There’s an increased risk of developing blood clots in the legs (deep vein thrombosis) or lungs (pulmonary embolism).
- Leaks in the Gastrointestinal System: Connections made during surgery may leak digestive contents into the abdomen.
- Death: Though rare, there is a risk of death associated with these procedures.
- Long-term Risks:
- Bowel Obstruction: Scar tissue can lead to blockages in the intestines.
- Dumping Syndrome: Rapid gastric emptying can cause nausea, vomiting, diarrhoea, and dizziness, especially after consuming high-sugar foods.
- Gallstones: Rapid weight loss increases the risk of gallstone formation.
- Hernias: Internal hernias can develop, causing pain and requiring surgical intervention.
- Low Blood Sugar (Hypoglycemia): Changes in digestion can lead to blood sugar fluctuations.
- Malnutrition: Reduced nutrient absorption can result in deficiencies in vitamins and minerals.
- Ulcers: Particularly common after gastric bypass surgery.
- Gastroesophageal Reflux Disease (GERD): Some procedures can exacerbate or lead to GERD.
- Weight Regain: It’s possible to regain weight if lifestyle changes are not maintained.
Case Study Highlight:
A recent incident at Queen Alexandra Hospital in Portsmouth underscores the potential risks. Susan Evans, 55, underwent elective gastric bypass surgery and was discharged without adequate postoperative evaluation. She later developed abdominal sepsis due to an anastomotic leak and, despite readmission and further treatment, passed away. The coroner’s report emphasised that adherence to postoperative care protocols is crucial to prevent such tragedies.
Considerations Before Surgery:
- Comprehensive Evaluation: Ensure a thorough medical assessment to determine suitability for surgery.
- I’d like you to please be fully informed of potential complications and long-term commitments.
- Lifestyle Changes: Commit to dietary modifications, regular physical activity, and possibly lifelong nutritional supplementation.
- Follow-up Care: Regular medical follow-ups are essential to monitor health and nutritional status.
Weight loss surgery is a procedure for many, but it’s imperative to weigh the benefits against the risks and approach the decision with comprehensive medical guidance.

