Which feeding characteristic can contribute to abdominal distention due to osmolarity?

Which feeding characteristic can contribute to abdominal distention due to osmolarity?

• A. Hyperosmolar solution (concentrated formulas)
• B. Isotonic solution
• C. Hypotonic solution
• D. Low-calorie formula

Answer: (A)

The main idea is how the osmolarity of a feeding affects water movement in the gut. A feeding with high osmolarity carries more solutes per milliliter than body fluids, so the body pulls water into the intestinal lumen to balance that gradient. That added luminal water increases the volume inside the gut, leading to abdominal distention, bloating, and possibly diarrhea, especially if gut motility is limited. That's why a hyperosmolar (concentrated) formula is the best choice for explaining distention due to osmolarity—it creates a larger osmotic load in the gut. Isotonic solutions are closer to body fluid osmolarity and cause less of a fluid shift. Hypotonic solutions would tend to draw water out of the lumen, not into it, reducing distention. A low-calorie formula isn't inherently about osmolar load unless it changes the solute concentration per volume, which is less directly linked to distention in the same way hyperosmolar feeds are.

The main idea is how the osmolarity of a feeding affects water movement in the gut. A feeding with high osmolarity carries more solutes per milliliter than body fluids, so the body pulls water into the intestinal lumen to balance that gradient. That added luminal water increases the volume inside the gut, leading to abdominal distention, bloating, and possibly diarrhea, especially if gut motility is limited.

That's why a hyperosmolar (concentrated) formula is the best choice for explaining distention due to osmolarity—it creates a larger osmotic load in the gut. Isotonic solutions are closer to body fluid osmolarity and cause less of a fluid shift. Hypotonic solutions would tend to draw water out of the lumen, not into it, reducing distention. A low-calorie formula isn't inherently about osmolar load unless it changes the solute concentration per volume, which is less directly linked to distention in the same way hyperosmolar feeds are.