Early Bladder Surgery Preserves Kidney Function in Adults

A retrospective observational study published in the African Journal of Urology reports that performing augmentation cystoplasty earlier in the disease course for adults with borderline bladder capacity is associated with durable improvements in bladder function, continence, and renal health. The research, conducted at a tertiary referral center in North India, evaluated 40 adult patients who underwent open ileocystoplasty between 2015 and 2024. The study suggests that intervening before the bladder reaches end-stage contraction may help prevent irreversible damage to the upper urinary tract while maintaining acceptable long-term morbidity.

Augmentation cystoplasty is a surgical procedure that incorporates a detubularized segment of bowel, typically from the ileum, into the native bladder. This technique is traditionally reserved for patients with severely contracted bladders, often when capacity has declined to less than 50 mL. However, the researchers aimed to assess whether earlier intervention in patients with borderline capacity, defined as 100 to 170 mL, could preserve residual detrusor function and protect renal function. The study focused on patients with refractory storage lower urinary tract symptoms who had failed maximal medical therapy, including anticholinergics, beta-3 adrenergic agonists, and intravesical botulinum toxin.

The cohort consisted of 40 adults with a mean age of 41.2 years, including 21 males and 19 females. The underlying etiologies were varied, reflecting the regional disease burden in the Indian subcontinent. Neurogenic bladder was the most common cause, accounting for 45% of cases, with spinal cord injury representing the largest proportion within that subgroup. Genitourinary tuberculosis accounted for 42% of the cohort, a significantly higher proportion than typically seen in Western series. Radiation-induced small-capacity bladder was noted in 7.5% of patients, while idiopathic and pheochromocytoma-associated bladder involvement were rare indications.

Preoperative urodynamic evaluations confirmed borderline bladder capacity and poor compliance in all participants. The mean preoperative bladder capacity was 139.6 mL, with a standard deviation of 16.6 mL. Bladder compliance was poor, averaging 17 mL/cm H2O, which is below the threshold of 20 mL/cm H2O typically defined as poor compliance. Mean detrusor leak point pressure was high at 46 cm H2O, indicating a high-pressure storage system that places the upper urinary tract at risk for reflux and renal damage. Serum creatinine levels were elevated preoperatively, with a mean of 1.77 mg/dL, suggesting existing renal impairment in a portion of the cohort.

Following the surgical intervention, significant improvements in urodynamic parameters were observed at follow-up. The mean bladder capacity increased to 282 mL, with a standard deviation of 12.4 mL, a change that was statistically significant with a p-value of less than 0.05. Bladder compliance improved markedly from 17 to 40 mL/cm H2O, also with a p-value of less than 0.05. The mean detrusor leak point pressure decreased substantially from 46 cm H2O to 13.6 cm H2O, indicating a successful conversion of the high-pressure reservoir into a low-pressure storage system. These changes suggest that the augmented bladder can store urine at lower pressures, reducing the risk of upper tract deterioration.

Continence and voiding outcomes were favorable for the majority of patients. Overall continence was achieved in 95% of the cohort, with only two patients experiencing urgency urinary incontinence that responded to medical therapy. Initially, 77.5% of patients were able to void spontaneously without the need for catheterization. However, long-term follow-up revealed that spontaneous voiding was not durable in all cases. Four of the 31 patients who initially voided spontaneously subsequently required intermittent clean intermittent catheterization (CIC) due to increasing post-void residual urine volumes. Consequently, at final follow-up, 67.5% of patients voided spontaneously, while 32.5% required CIC. No patient required permanent indwelling catheterization.

Renal function showed stabilization and improvement in the majority of patients. Mean serum creatinine decreased from 1.77 mg/dL preoperatively to 1.41 mg/dL at follow-up, a statistically significant improvement with a p-value of less than 0.05. No patient demonstrated deterioration in renal function during the follow-up period, and no new-onset upper tract dilatation was detected on ultrasonography. The researchers noted that the preservation of renal function may be attributed to the timely reduction of intravesical pressures, which interrupts the pathophysiological process of obstructive nephropathy before irreversible fibrosis sets in.

Vesicoureteral reflux (VUR) was present in 38 of the 40 patients preoperatively. The study evaluated the effectiveness of augmentation cystoplasty alone in resolving reflux, reserving concomitant ureteric reimplantation for only six patients with high-grade reflux. Among the 32 patients managed with augmentation alone, complete resolution of VUR was observed in 81.3% of cases. The remaining 18.7% demonstrated downgrading of reflux. None of these patients required additional anti-reflux procedures. These findings support the concept that VUR in small-capacity bladders is primarily a pressure-dependent phenomenon that can be reversed by normalizing bladder dynamics.

Quality of life and lower urinary tract symptoms improved significantly following surgery. The mean International Prostate Symptom Score (IPSS) decreased from 27 preoperatively to 6 at follow-up, indicating substantial symptomatic relief. Validated quality-of-life questionnaires showed parallel improvements across all evaluated domains. Patient satisfaction was high, with most patients reporting that they would choose the procedure again. The durability of these improvements over a mean follow-up period of six years suggests that early augmentation cystoplasty provides lasting benefits in terms of symptom burden and daily functioning.

Complications were generally manageable and infrequent. Early postoperative complications included one ileal anastomotic leak and one ureteric stricture, both of which were managed successfully. Late complications included bladder stone formation in 10% of patients, which was the most frequent long-term issue. Bladder stones were managed with endoscopic intervention. Two patients experienced recurrent urinary tract infections, which were controlled with antimicrobial therapy. No patient developed malignancy or clinically significant metabolic complications, such as acidosis or vitamin B12 deficiency, during the follow-up period. The absence of metabolic derangements may be related to the preserved renal function in the cohort.

The study acknowledges several limitations, including its retrospective design and relatively modest sample size of 40 patients. The lack of a control group limits the ability to draw causal conclusions, and the findings are based on within-patient pre- and postoperative comparisons. The researchers note that prospective studies involving larger cohorts and longer follow-up are required to further define the optimal timing for intervention and validate the benefits of early augmentation. Despite these limitations, the long duration of follow-up strengthens the conclusions regarding the durability of outcomes.

The findings have particular relevance for regions where genitourinary tuberculosis and chronic inflammatory bladder conditions are prevalent. In such settings, delayed diagnosis and referral often result in end-stage bladders with poor reconstructive outcomes. The study suggests that considering augmentation cystoplasty at a borderline stage may prevent this progression and improve long-term outcomes. The authors propose that augmentation cystoplasty should not be regarded solely as a last-resort option for end-stage disease but rather as a timely surgical intervention for carefully selected patients with refractory symptoms.

In conclusion, the study demonstrates that early augmentation cystoplasty in adults with borderline bladder capacity is associated with durable improvements in bladder function, continence, and quality of life. The procedure appears to preserve renal function and effectively resolve pressure-dependent vesicoureteral reflux. While complications such as bladder calculi and urinary tract infections may occur, they are generally manageable and are outweighed by the substantial improvements in clinical outcomes. The research supports the concept that earlier surgical intervention may prevent irreversible bladder and renal damage with acceptable long-term morbidity.

Subject of Research: Long-term functional and renal outcomes of early augmentation cystoplasty in adults with borderline bladder capacity

Article Title: Early augmentation cystoplasty in adults with borderline bladder capacity: long-term functional and renal outcomes

Article References: Khawaja, A. R., Arsalan, S. S., Quadir, U., Lone, S. S., Para, S. A., Mehdi, S., Malik, S. A., Bhat, A. H., Kannan, G., & Raina, A. B. (2026). Early augmentation cystoplasty in adults with borderline bladder capacity: long-term functional and renal outcomes. African Journal of Urology, 32(1), Article 52. https://doi.org/10.1186/s12301-026-00602-5

Image Credits: AI Generated

DOI: 10.1186/s12301-026-00602-5

Keywords: augmentation cystoplasty, bladder capacity, renal function, vesicoureteral reflux, urodynamics, ileocystoplasty, neurogenic bladder, genitourinary tuberculosis, clean intermittent catheterization, quality of life, Early, augmentation