Evoluting the invaginated--one step closer to the perfect valve? Modified serosal lined tapered ileum (Kälble's procedure) as a continence mechanism for catheterizable pouches.

INTRODUCTION: A sufficient and easily catheterizable continence mechanism is essential in continent cutaneous pouches. Kälble embedded a tapered ileum as efferent segment into a serosal lined tunnel formed by an ileal 'U' according to the principle of Abol-Enein and Ghoneim. We report a modified technique applied in a series of 12 patients who had undergone different urinary diversions.
METHODS: All patients received a modified Kälble procedure (first-line urinary diversion, n = 8; revision/undiversion, n = 4) for different forms of continent pouches. To alleviate embedding of the efferent segment, ileal detubularization was performed asymmetrically. Mean follow-up was 9.5 months.
RESULTS: All patients were continent and performed self-catheterization easily. Of 12 patients, 2 underwent endoscopic incision for stomal stenosis 8 and 12 months postoperatively.
CONCLUSIONS: Subject to our short follow-up, Kälble's technique is a promising alternative in patients undergoing a continent cutaneous urinary diversion but offers an inapplicable or missing appendix.