If catheter insertion exceeds 6 inches without feeling the blockage, what is the likely cause?

• A. The blockage is likely due to adhesions rather than a food bolus
• B. The blockage is caused by a foreign body
• C. The blockage is resolved
• D. The catheter length is not relevant

Answer: (B)

When irrigating a stoma, how far you can advance the catheter before feeling resistance helps identify the blockage type. If you can push the catheter beyond six inches without encountering a blockage, the obstruction is more consistent with a foreign body lodged deeper in the lumen rather than a simple stool buildup or fixed narrowing from adhesions. A stool bolus or adhesions would typically produce resistance earlier, closer to the stoma opening. A foreign object can sit farther along the tract and not be felt until deeper positions are reached, making it the most plausible cause in this scenario. If you encounter unexpected resistance or pain, stop and assess further rather than forcing the catheter.