Bladder function evaluation before renal transplantation in nonurologic disease: is it necessary?

Area of Science:

• Urology
• Nephrology
• Transplantation Medicine

Background:

• End-stage renal disease (ESRD) from nonurologic causes affects bladder function.
• Renal transplantation aims to restore renal function and potentially improve associated lower urinary tract symptoms.

Purpose of the Study:

• To evaluate the necessity of preoperative cystometry and pressure flow studies (PFS) in ESRD patients undergoing renal transplantation.
• To assess changes in bladder function parameters after renal transplantation.

Main Methods:

• Prospective evaluation of 30 ESRD patients (nonurologic causes) undergoing renal transplantation.
• Cystometry and PFS performed preoperatively and 6 months post-transplantation.
• Inclusion criteria: age >18 years, ESRD secondary to nonurologic disease.

Main Results:

• Significant improvements observed in bladder capacity, compliance, and maximal flow rate 6 months post-transplantation.
• Bladder filling sensations and desire to void significantly improved.
• Abrams-Griffiths number decreased in men, indicating improved detrusor contractility.
• No significant changes in detrusor pressure at maximal flow rate or postvoid residual volume.

Conclusions:

• Cystometry and PFS parameters significantly improve 6 months after renal transplantation in ESRD patients without urologic disease.
• Improvement is linked to the recovery of glomerular filtration rate and urine output from the renal graft.
• Preoperative urodynamic evaluation may not be essential for this patient population.