What distinguishes a Kock pouch from other types of ileostomy?

A Kock pouch is distinguished from other types of ileostomy primarily by its unique valve mechanism. This internal pouch is created from the ileum and features a one-way valve that prevents the backflow of stool, allowing for the controlled evacuation of intestinal contents. This design is significant because it provides patients with a degree of continence, meaning they can manage their ostomy more discreetly compared to traditional ileostomies that require an external appliance for collection.

The valve mechanism is central to the function of the Kock pouch, as it allows for periodic drainage of the pouch via a catheter, instead of relying solely on an external stoma output. This differentiates it markedly from standard ileostomies, where feces are continuously emptied into an external bag, and from other ostomies that do not utilize this specific internal valving system.

Other choices do not accurately represent the defining features of a Kock pouch. For instance, it is not a temporary colostomy; rather, it is a permanent solution for managing intestinal waste. Additionally, while it is a form of an internal diversion, it is not a continent urinary diversion, as the term mostly relates to urinary diversions rather than stool management. Lastly, it is not primarily focused