Which factor after GI surgery may impact absorptive function related to the specific segment of bowel that has been resected?

Which factor after GI surgery may impact absorptive function related to the specific segment of bowel that has been resected?

• A. Prior gastric resection
• B. Specific segment of small bowel that has been resected
• C. Residual disease in the remaining intestine
• D. Absence of colon and/or ileocecal valve

Answer: (B)

Absorptive function after GI surgery is determined by which segment of the small intestine is removed, because each segment has specialized roles. The jejunum is the main site for most nutrient and macronutrient absorption (carbohydrates, amino acids, fats) with a large surface area, while the ileum handles reabsorption of bile acids and vitamin B12, along with specific nutrients. Therefore, the specific segment resected directly shapes what absorption is most affected and how the patient’s digestion will be altered. If the ileum is removed, bile acid and B12 absorption are impaired; if the jejunum is removed, broader macronutrient and mineral absorption can be limited. Over time, the remaining intestine can adapt to improve absorption, but the initial impact is determined by which segment was resected. Factors like prior gastric surgery or absence of colon/ileocecal valve influence other aspects of digestion and overall absorption, but they do not define the absorptive capabilities tied to the resected small-bowel segment.

Absorptive function after GI surgery is determined by which segment of the small intestine is removed, because each segment has specialized roles. The jejunum is the main site for most nutrient and macronutrient absorption (carbohydrates, amino acids, fats) with a large surface area, while the ileum handles reabsorption of bile acids and vitamin B12, along with specific nutrients. Therefore, the specific segment resected directly shapes what absorption is most affected and how the patient’s digestion will be altered. If the ileum is removed, bile acid and B12 absorption are impaired; if the jejunum is removed, broader macronutrient and mineral absorption can be limited. Over time, the remaining intestine can adapt to improve absorption, but the initial impact is determined by which segment was resected. Factors like prior gastric surgery or absence of colon/ileocecal valve influence other aspects of digestion and overall absorption, but they do not define the absorptive capabilities tied to the resected small-bowel segment.