Which surgical procedure involves removing the majority of the stomach to limit food intake?

The procedure that involves removing the majority of the stomach to limit food intake is sleeve gastrectomy. This surgical technique entails surgically excising approximately 80% of the stomach, resulting in a tubular or "sleeve" shaped stomach that significantly reduces its volume. By creating a smaller stomach, the procedure promotes a feeling of fullness with less food intake, which assists patients in achieving weight loss and improving obesity-related health issues.

Additionally, sleeve gastrectomy has physiological effects beyond mere restriction; it also impacts hormonal pathways that regulate hunger and satiety. For instance, the reduction in the stomach size leads to lower levels of ghrelin, the hormone that stimulates appetite, contributing to decreased hunger levels in patients post-surgery.

In context, other surgical options mentioned, such as gastric bypass, involve rerouting the small intestine rather than removing a large portion of the stomach. Adjustable gastric banding places a band around the upper portion of the stomach to limit intake but does not involve extensive removal. Biliopancreatic diversion includes sleeve gastrectomy as a component but is a more complex procedure that involves both restriction and intestinal bypass.