What is a key feature of a Kock pouch?

A Kock pouch, also known as a continent ileostomy, is characterized by its unique nipple valve mechanism, which allows for continent storage of stool. This means that the pouch is designed to hold stool internally, and the patient can then self-catheterize to empty the pouch, maintaining a degree of control over their bowel movements.

The nipple valve mechanism is essential in providing continence, as it prevents the involuntary leakage of stool from the pouch. This valve acts as a one-way system that opens when pressure from the stool builds up inside the pouch, allowing for controlled emptying.

The other aspects of the Kock pouch, such as being an end colostomy or exclusively for rectal cancers, do not apply. The Kock pouch is specifically an ileal pouch constructed from a segment of the small intestine, not a colostomy, and it can be utilized in various conditions, not just rectal cancers. Additionally, it does not involve pair anastomosis as a defining characteristic. Therefore, the nipple valve mechanism is a fundamental aspect that distinguishes the Kock pouch and highlights its design for maintaining continence.