Sleeve Gastrectomy procedure involves removing the lateral 2/3rds of the stomach with a stapling device. It can be done laparoscopically ( keyhole surgery) but is not reversible. It basically leaves a stomach tube instead of a stomach sack.
Find out more about Tube Gastrectomy with the following links.
Laparoscopic Sleeve Gastrectomy by Colm O'Boyle
Cork Laparoscopic Surgery. Registered in Ireland – Company Number 480505 Registered Office: Evergreen House, Congress Road, Cork Directors: C O’Boyle, U O’Boyle