To evaluate the long-term outcomes and impact of surgical modifications on the need for secondary surgery of the Hemi-Kock continent catheterizable stoma, comprising a detubularized ileal segment with an attached stapled ileoileal intussusception of the catheterizable channel, in patients with complex lower urinary tract disorders. The technique may be used for augmentation in patients with reduced bladder capacity who require a continent catheterizable channel. Compared to the flap and ileocecal valve procedures, the hemi-Kock technique has not been widely adopted.

This is a retrospective case series including all patients who underwent a hemi-Kock catheterizable channel with cystoplasty from a single institution. Surgical technique and modifications in valve construction and tapering of the catheterizable limb are described.

A total of 109 patients, with a median age of 38 years (range 18-72), underwent the procedure. At a mean of 10.4 years, 98 patients (90%) reported that they were managing with clean intermittent catheterization ± pads; 11 (10%) were failures. A total of 70 (64.2%) patients underwent secondary interventions with >60% performed endoscopically or under local anesthesia, mainly for bladder stones. Fourteen patients (12.8%) required valve revisions. However, the rate decreased from 18.2% (8/44) to 9.3% (6/65) following incorporation of the surgical modifications.

We present the largest cohort to date of patients managed with a Hemi-Kock catheterizable channel and cystoplasty. Valve revision rate improved with surgical modifications. We demonstrate long-term durability and maintenance of stomal catheterization in the vast majority of patients.