Certified Ostomy Care Nurse Practice Exam 2025 – All-in-One Guide to Mastering Your COCN Certification!

The answer is accurate because the correct procedure for nephrostomy tube irrigation involves instilling a small volume of normal saline into the system to help flush out the tube and ensure patency. After this irrigation process, it is standard practice to withdraw and dispose of the fluid that has been instilled. This ensures that any debris or sediment dislodged during irrigation is removed from the nephrostomy tube, preventing potential complications such as blockage.

Withdrawing the saline and any flushed material helps maintain the flow and function of the tube, which is crucial for the patient's kidney drainage. Not disposing of the fluid could lead to a buildup of fluid and other substances within the nephrostomy system, potentially causing issues.