The gastric sleeve is a surgical technique in which part of the stomach is extirpatedleaving the remaining part shaped like a tube.

This intervention means the stomach can be reduced by 80%, making the patient have a greater sensation of feeling full and notably reducing the sensation of being hungry. 

This intervention is carried out under general anaesthetic and is done by laparoscope, a minimally-invasive technique. 

The operation time, usually between one and two hours, may vary depending on the difficulty of the case.