# Gastric Sleeve (Sleeve Gastrectomy)

> Citation bundle for Gastric Sleeve (Sleeve Gastrectomy) on The Treatment Registry.
> URL: https://thetreatmentregistry.com/procedures/gastric-sleeve
> Bundle URL: https://thetreatmentregistry.com/api/citations/procedures/gastric-sleeve

- Category: weight-loss
- Average recovery: 21 days
- Typical sessions: 1
- Price range (USD international): $4,000–$15,000

## Description

Sleeve gastrectomy removes approximately 80% of the stomach laparoscopically, creating a tube-shaped stomach that restricts food intake and reduces hunger hormones. It is one of the most commonly performed bariatric procedures worldwide. The procedure is irreversible and requires lifelong dietary changes.

## Overview

Sleeve gastrectomy is a laparoscopic procedure performed under general anaesthesia, typically lasting sixty to ninety minutes. The surgeon resects approximately seventy-five to eighty per cent of the stomach along the greater curvature using a linear stapling device calibrated over a sizing tube (bougie) placed within the remaining gastric lumen. The resected portion — containing the majority of ghrelin-producing fundic tissue — is removed, leaving a narrow tubular stomach. The staple line is inspected for haemostasis and may be reinforced with buttressing material or oversewn at the surgeon's discretion.

Candidacy is assessed using established bariatric criteria: BMI of 40 or above, or BMI of 35 or above with at least one obesity-related comorbidity (type 2 diabetes, hypertension, obstructive sleep apnoea). Some programmes accept lower BMI thresholds with comorbidities. Pre-operative workup includes nutritional assessment, upper gastrointestinal endoscopy to exclude pathology such as Helicobacter pylori infection, and cardiopulmonary evaluation for high-risk patients. A pre-operative liver-shrinking diet (typically two to four weeks of low-calorie or high-protein nutrition) is almost universally required.

Patients are mobilised the day of surgery and typically discharged after two to three days on a staged post-operative diet progressing from liquids to purées to soft foods over approximately six weeks. Lifelong supplementation with vitamins and minerals — including B12, iron, calcium, and a multivitamin — is mandatory. Weight loss is typically most rapid in the first twelve to eighteen months, with patients losing fifty to seventy per cent of their excess weight. Regular bariatric follow-up is essential for monitoring nutritional status and long-term weight maintenance.

## Peer-reviewed outcome rates

- **Complication rate:** 5.00% (range 2.00–10.00%) — from 2 cited sources
- **Revision rate:** 5.00% (range 2.00–10.00%) — from 1 cited source
- **Mortality rate:** 0.10% (range 0.05–0.20%) — from 2 cited sources

## Common risks

- Staple line leak (most serious surgical complication)
- Stricture (narrowing of the sleeve)
- Gastroesophageal reflux (GERD) — may worsen or develop post-surgery
- Nutritional deficiencies (B12, iron, calcium, folate)
- Deep vein thrombosis
- Insufficient weight loss or weight regain over time

## FAQs

### How much weight will I lose after a gastric sleeve?

Most patients lose fifty to seventy per cent of their excess body weight within twelve to eighteen months of surgery. The exact amount depends on starting weight, adherence to dietary guidelines, and lifestyle factors including physical activity.

### Is the gastric sleeve reversible?

No. Sleeve gastrectomy permanently removes approximately eighty per cent of the stomach, and this cannot be reversed. However, in cases where results are insufficient, the procedure can be converted to a gastric bypass or duodenal switch in a subsequent operation.

### Will I need to take vitamins for life?

Yes. Because the reduced stomach size limits nutrient absorption and the volume of food that can be consumed, lifelong supplementation with a multivitamin, vitamin B12, calcium, vitamin D, and iron is essential. Deficiencies develop gradually and must be monitored with regular blood tests.

### Can the stomach stretch back after a gastric sleeve?

The sleeve can gradually expand over time, particularly with persistent overeating, though it will not return to its original size. Significant stretching is one factor that contributes to weight regain in some patients several years after surgery, alongside changes in eating habits.

### Will I have loose skin after losing weight?

Significant weight loss often results in loose or redundant skin, particularly in the abdomen, thighs, and upper arms. The extent depends on the amount of weight lost, age, skin elasticity, and genetics. Body contouring surgery can address this but is a separate procedure.

### Does gastric sleeve surgery hurt?

The procedure is performed under general anaesthesia and is not painful during surgery. Post-operative discomfort — typically described as soreness at the port sites and shoulder-tip pain from the gas used in laparoscopy — is usual for the first few days and is managed with analgesics.

### How do I qualify for gastric sleeve surgery?

Most programmes require a BMI of 40 or above, or a BMI of 35 or above combined with at least one obesity-related condition such as type 2 diabetes, hypertension, or sleep apnoea. A psychological evaluation and nutritional assessment are typically required before approval.

### Can gastric sleeve surgery cure type 2 diabetes?

Many patients experience significant improvement or complete remission of type 2 diabetes following sleeve gastrectomy, often within weeks of surgery — before major weight loss has occurred. This is attributed to hormonal changes rather than weight loss alone, though results vary and the condition may return over time.

## Alternative treatments

- **Gastric bypass (Roux-en-Y)** — Greater long-term weight loss + better type-2 diabetes remission, more nutritional surveillance required.
- **Mini gastric bypass** — Single-anastomosis variant; shorter operating time, similar weight-loss profile.
- **Endoscopic sleeve gastroplasty** — Non-surgical alternative for lower BMI candidates or those declining surgery; less weight loss.
- **Gastric balloon** — Reversible 6-12 month intervention; useful as a bridge or for lower-BMI candidates.
- **GLP-1 receptor agonists (semaglutide, tirzepatide)** — Pharmacological alternative now achieving 15-20% body-weight loss; requires lifelong dosing.

## Sources

- [Cochrane Database — Surgery for weight loss in adults](https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD003641.pub5/full) — Cochrane Database of Systematic Reviews (accessed 2026-05-09)
- [IFSO — Clinical Guidelines for Bariatric and Metabolic Surgery](https://www.ifso.com/clinical-guidelines/) — International Federation for the Surgery of Obesity and Metabolic Disorders (accessed 2026-05-09)
- [PubMed — Bariatric surgery mortality and complications systematic reviews](https://pubmed.ncbi.nlm.nih.gov/?term=bariatric+surgery+mortality+systematic+review) — PubMed / National Library of Medicine (accessed 2026-05-09)
- [ASMBS — Clinical Practice Guidelines for Metabolic and Bariatric Surgery](https://asmbs.org/resources/clinical-practice-guidelines) — American Society for Metabolic and Bariatric Surgery (accessed 2026-06-29)
- [NICE NG89 — Venous thromboembolism in over 16s: reducing the risk of hospital-acquired DVT and PE](https://www.nice.org.uk/guidance/ng89) — National Institute for Health and Care Excellence (accessed 2026-05-09)