A Contemporary Evaluation of Urological Outcomes After Renal Transplantation.

Introduction: Urological surgery after renal transplantation leaves patients at risk of infection and further urological complications. Our objective was to discern patient factors associated with adverse outcomes following renal transplantation to identify patients who would benefit from close urological follow-up.
Methods: Retrospective chart review was conducted for patients undergoing renal transplantation between August 1, 2016 and July 30, 2019 at a tertiary care academic center. Data on patient demographics, medical history, and surgical history were collected. Primary outcomes observed were urinary tract infection, urosepsis, urinary retention, unexpected urology visit, and urological procedures within 3 months of transplant. Variables determined significant by hypothesis testing were used in logistic regression modeling for each primary outcome.
Results: Of the 789 renal transplant patients, 217 (27.5%) developed postoperative urinary tract infection and 124 (15.7%) developed postoperative urosepsis. Patients with postoperative urinary tract infection were more likely to be female (OR 2.2, P < . 01), have pre-existing prostate cancer (OR 3.1, P < . 01), and recurrent urinary tract infections (OR 2.1, P < . 01). After renal transplant, unexpected urology visits were observed in 191 (24.2%) patients, and urological procedures were performed in 65 (8.2%) patients. Postoperative urinary retention was noted in 47 (6.0%) patients and seen more often in patients with benign prostatic hyperplasia (OR 2.8, P = .033) and prior prostate surgery (OR 3.0, P = .072).
Conclusions: Identifiable risk factors associated with urological complications after renal transplantation include benign prostatic hyperplasia, prostate cancer, urinary retention, and recurrent urinary tract infections. Female renal transplant patients are at increased risk of postoperative urinary tract infection and urosepsis. These patient subsets would benefit from establishing urological care and pre-transplant urological evaluation including urinalysis, urine cultures, urodynamic studies, and close follow-up post-transplant.