Abstract

• To evaluate complications after urinary bladder augmentation or substitution in a prospective study in children. • Data of 86 patients who underwent urinary bladder augmentation (80 patients) or substitution (6 patients) between 1988 and 2008 at the authors' institute were analysed. • Ileocystoplasty occurred in 32, colocystoplasty in 30 and gastrocystoplasty in 18. Urinary bladder substitution using the large bowel was performed in six patients. • All patients empty their bladder by intermittent clean catheterization (ICC), 30 patients via their native urethra and 56 patients through continent abdominal stoma. Mean follow-up was 8.6 years. • Rate of complications and frequency of surgical interventions were statistically analysed (two samples t-test for proportions) according to the type of gastrointestinal part used. • In all, 30 patients had no complications. In 56 patients, there were a total of 105 complications (39 bladder stones, 16 stoma complications, 11 bowel obstructions, 5 reservoir perforations, 7 VUR recurrences, 1 ureteral obstruction, 4 vesico-urethral fistulae, 4 orchido-epididymitis, 4 haematuria-dysuria syndrome, 3 decreased bladder capacity/compliance, 3 pre-malignant histological changes, 1 small bowel bacterial overgrowth and 7 miscellaneous). • In 25 patients, more than one complication occurred and required 91 subsequent surgical interventions. Patients with colocystoplasty had significantly more complications (P < 0.05), especially more stone formation rate (P < 0.001) and required more post- operative interventions (P < 0.05) than patients with gastrocystoplasty and ileocystoplasty. • Urinary bladder augmentation or substitution is associated with a large number of complications, particularly after colocystoplasty. • Careful patient selection, adequate preoperative information and life-long follow-up are essential for reduction, early detection and management of surgical and metabolic complications in patients with bladder augmentation or substitution.

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