Who it is for
A simpler operation than a bypass. Same BMI-based indications as gastric bypass. Often preferred as a first operation for patients who are otherwise well, want a simpler procedure without intestinal rerouting, or have specific reasons to avoid bypass. Less suited to patients with pre-existing severe reflux.
How the operation is performed
Laparoscopically, through five small keyhole incisions. A long stapler is used to remove approximately 75–80% of the stomach along the greater curvature, leaving a thin vertical tube. The removed portion is permanently gone. Operating time is typically about 60 minutes.
Typical weight loss and outcomes
Most patients lose 50–70% of their excess body weight over 12–18 months. Significant improvements in type 2 diabetes, sleep apnoea and hypertension are common, though on average the metabolic effect is slightly less pronounced than gastric bypass.
Recovery
1–2 day hospital stay. The same staged diet progression as gastric bypass: clear liquids → full liquids → puréed → soft → regular, over the first month, with small protein-first portions.
Long-term commitments
Daily multivitamin, vitamin B12, iron and calcium + D supplementation. Twice-yearly follow-up for the first two years, then annually.
Things to consider
Reflux can develop or worsen in a minority of patients after sleeve; if severe and unresponsive to medication, conversion to gastric bypass is sometimes offered later. Not reversible: the removed portion of the stomach is permanently gone.