The Sleeve Gastrectomy (gastric sleeve surgery) operation is done with 5 small incisions, and takes about an hour to do. The stomach is restricted by dividing it vertically and removing more than 85% of it. This part of the procedure is not reversible.
The stomach that remains is shaped like a banana and measures from 1-2 ounces (40-80cc). The nerves to the stomach and the outlet valve (pylorus) remain intact with the idea of preserving the functions of the stomach while reducing the volume.
By comparison, in a Roux-en-Y gastric bypass, the stomach is divided, not removed, and the pylorus is excluded. Note that there is no intestinal bypass with this procedure, only stomach reduction.
Having the Laparoscopic Sleeve Gastrectomy involves an overnight stay in the hospital. There is no nasogastric tube, and you are able to return to work, resume heavy lifting and strenuous activity, in most cases, in about two weeks from the time of surgery. If you are able to do light duty at work, there is the possibility of going back to work sooner than two weeks for some patients.