Sleeve Gastrectomy: Procedure, Benefits, Risks, and Long-Term Outcomes

Sleeve gastrectomy (vertical sleeve gastrectomy, gastric sleeve) is a laparoscopic bariatric surgery that removes approximately 75–80% of the stomach, leaving a narrow, banana-shaped sleeve connecting the esophagus to the small intestine. It is primarily a restrictive procedure—limiting food intake—and also reduces ghrelin (the "hunger hormone") production.

Surgical Procedure

• Performed under general anesthesia via 4–5 small abdominal incisions.
• The greater curvature of the stomach is resected using a surgical stapler.
• The remaining tubular stomach is calibrated over a bougie (typically 36–40 Fr) to standardize size.
• Operative time: 60–90 minutes; hospital stay: 1–2 nights.

Benefits

• Significant, sustained weight loss: 50–70% of excess weight at 1–2 years.
• Improvement/resolution of obesity-related comorbidities: type 2 diabetes, hypertension, sleep apnea, dyslipidemia, NAFLD.
• No intestinal rerouting (unlike gastric bypass)—lower risk of malabsorption, dumping syndrome, internal hernias.
• Preserves pyloric valve—normal gastric emptying, reduced nausea.
• Can be converted to bypass or duodenal switch if needed.

Risks and Complications

• Early: Staple line leak (1–2%), bleeding, infection, DVT/PE, adverse reaction to anesthesia.
• Late: Stricture/stenosis of the sleeve, GERD (new or worsened), nutritional deficiencies (B12, iron, folate, vitamin D), weight regain (10–20% at 5+ years).
• General: Requires lifelong vitamin supplementation and medical follow-up.

Keys to Long-Term Success

• Adherence to dietary progression (clear liquids → pureed → soft → regular).
• High-protein, low-sugar, low-fat diet; adequate hydration (64 oz/day).
• Regular physical activity (150+ min/week moderate intensity).
• Lifelong multivitamin, calcium citrate, B12, vitamin D, iron as prescribed.
• Annual lab monitoring and bariatric team follow-up.

Sleeve gastrectomy is a powerful tool, not a cure. Sustainable results require permanent lifestyle change and ongoing medical partnership.