What is the preferred flush solution to maintain feeding tube patency?

• A. Water
• B. Saline solution
• C. D5W
• D. Juice

Answer: (A)

Maintaining a feeding tube’s patency relies on flushing with a solution that cleans the lumen without adding substances that could encourage clogging or microbial growth. Water fits this role best because it is non-nutritive and free of sugars or electrolytes, so it effectively rinses residual formula and mucus without feeding bacteria or altering the tube environment. Solutions containing sugar, like D5W, can provide a substrate for microbes and promote biofilm formation, increasing the risk of occlusion. Juices introduce sugars and acids that can promote microbial growth and are not sterile for the tube. Saline adds a sodium load and fluid balance considerations; while it can be used in some contexts, it is not the preferred routine flush for patency. Therefore, water is the best choice for routine flushing to keep the tube open.