# Severe obesity with comorbidity

> Citation bundle for Severe obesity with comorbidity on The Treatment Registry.
> URL: https://thetreatmentregistry.com/conditions/severe-obesity-with-comorbidity
> Bundle URL: https://thetreatmentregistry.com/api/citations/conditions/severe-obesity-with-comorbidity

## Description

Patients with BMI ≥40, or ≥35 with significant comorbidity (type 2 diabetes, sleep apnoea, hypertension), may be candidates for bariatric (weight-loss) surgery. The treatment ladder runs through medical management, modern weight-loss pharmacotherapy, endoscopic procedures, and definitive surgery. Surgical options have different mechanisms and trade-offs around weight loss, reflux, and reversibility.

## Treatment ladder

### conservative

- **Multidisciplinary medical weight management** — Coordinated dietetic, behavioural, and exercise support. Effective in some patients but historically modest long-term outcomes for severe obesity.
- **GLP-1 receptor agonist therapy** — Semaglutide, tirzepatide, and related agents producing 15-25% body-weight reduction in many patients. Continuing evidence base; weight typically regained on cessation.

### procedural

- **Endoscopic gastric balloon** — Saline- or air-filled balloon placed endoscopically for 6 months. Modest weight loss; suitable as a bridge therapy or for patients ineligible for surgery.
- **Endoscopic sleeve gastroplasty** — Endoscopic suturing to reduce stomach volume without surgical resection. Less established evidence than surgical alternatives.

### surgical

- **Sleeve gastrectomy** — Resection of approximately 75% of the stomach to create a tubular gastric remnant. The most commonly performed bariatric operation worldwide; durable weight loss but elevated reflux risk in some patients.
- **Roux-en-Y gastric bypass** — Creation of a small gastric pouch and a Roux limb of small bowel, bypassing most of the stomach and proximal small bowel. Greater weight loss than sleeve in many series; better resolution of reflux and type 2 diabetes; technically more demanding.
- **Mini gastric bypass (one-anastomosis)** — Single-anastomosis variant of bypass. Shorter operating time; concerns about long-term bile reflux remain debated.

## Related procedures

- https://thetreatmentregistry.com/procedures/gastric-sleeve

## Sources

- [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)