Which of the following best describes BPD/DS?

BPD/DS, or biliopancreatic diversion with duodenal switch, is best described as a combined restrictive and malabsorptive surgical approach. This surgical procedure incorporates two main mechanisms: first, it restricts the size of the stomach to limit food intake, which is the restrictive component. This is achieved by creating a smaller stomach pouch. Second, it alters the digestive process by bypassing a significant portion of the small intestine, which reduces nutrient absorption, thus representing the malabsorptive aspect.

The combination of these two strategies is integral to the effectiveness of BPD/DS in treating obesity, as it leads to significant weight loss and improvements in obesity-related conditions. The procedure not only limits caloric intake due to the smaller stomach pouch but also decreases the absorption of calories and nutrients because of the bypassed sections of the intestine. This dual approach differentiates BPD/DS from other weight loss surgical options that may either focus solely on restriction or solely on malabsorption.