What size catheter is used for ileostomy lavage?

• A. 6 French catheter
• B. 22-24 FR catheter
• C. 14-16 FR catheter
• D. 10 FR catheter

Answer: (C)

Choosing the right catheter size for ileostomy lavage is about balancing flow with safety. The ileum has a relatively delicate mucosa, so you want a catheter that is wide enough to allow the irrigation fluid to pass smoothly but not so large that it risks trauma or irritation. A 14–16 French catheter meets that balance: it's large enough to prevent frequent clogging and uncomfortable resistance, yet small enough to be inserted safely into the ileostomy without causing trauma.

Smaller sizes, like 6 or 10 French, may kink or restrict flow and be uncomfortable, making irrigation ineffective. A larger size, around 22–24 French, can be too bulky for the ileostomy lumen and increase the risk of mucosal injury or stoma irritation. So, a 14–16 French catheter is the best choice for ileostomy lavage.