What may occur with calorically dense or high-fiber formulas that decreases tube patency?

• A. Accumulation of formula sediment in the inner lumen
• B. Increased gastric motility
• C. Faster flow rates
• D. Decreased risk of clogging

Answer: (B)

Sediment buildup inside the lumen is the mechanism that reduces tube patency with calorically dense or high-fiber formulas. These formulas are thicker and more viscous, and the fiber can form gel-like material. In a feeding tube—especially a small-bore tube—this thicker material can settle and adhere to the inner walls, gradually narrowing or occluding the channel. The result is a partial or complete blockage that interrupts the flow of formula. To prevent this, ensure thorough mixing and proper hydration of the formula, flush the tube regularly before and after feeds (and between transitions), consider using a larger bore tube if repeated occlusions occur, and choose a formula whose viscosity is compatible with the tube size and administration method. Increased gastric motility or faster flow would not explain a decreased patency and are not typical contributors to tube occlusion.