Bladder augmentation (BA) is the gold standard treatment to increase compliance and treat neurological detrusor overactivity (DO) in children with neurological bladder refractory to medical treatment. In pediatrics, bivalve cystoplasty (Clam) is preferred to supratrigonal cystectomy. Our initial aim was to evaluate the re-intervention rate and long-term outcomes of BA in relation to Clam in children. The secondary aim was the evaluation of refractory DO during follow up after Clam cystoplasty. A retrospective analysis was performed including all patients < 18 years of age operated for BA with Clam for neurological bladder (01/2004 to 01/2023). Pre- and postoperative urodynamics were performed. Twenty-six patients (14 girls and 12 boys) underwent surgery for BA. The median age was 8 years (IQR 5-12). The causes of Neurogenic Low Urinary Tract Dysfunction were spina bifida in 8 patients, Hinman syndrome in 8 patients and sacral agenesis in 8 patients. The ileum was used in 100% of cases and 8 children had continent catheterizable channels inserted (29.6%). The overall re-intervention rate was 41% (11/27) for median follow-up of 7 years (IQR 4-12). The rates of early and late complications > Clavien 2 were 11% and 22% respectively. BA resulted in significant postoperative improvements (at 1, 5, 10 and 15 years) in compliance (p=0.0332), detrusor overactivity (DO) (p=0.032) and bladder capacity (167ml preoperatively and 425ml at 15 years (p<0.0001)). No refractory DO was identified, and no second augmentation procedure was required during the follow-up period. Two children had a Bricker (7%) due to cognitive impairment preventing self-catheterizing. BA with clam cystoplasty seems a safe and effective treatment for children with neurological bladder. The re-intervention rate is comparable to current literature, and long-term urodynamic parameters demonstrate sustained improvements. The absence of refractory DO and additional augmentation procedures highlight the favorable long-term outcomes of this surgical approach.
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