(205) Functional Outcomes in Non-Transecting Excision-Anastomosis Urethroplasty for Lengthy (≥2cm) Urethral Strictures

Abstract

Abstract Introduction Spongiosal sparing non-transecting anastomotic bulbar urethroplasty has rapidly become the preferred technique for many reconstructive urologists due to reported improvement in postoperative erectile function outcomes. For strictures <2cm, non-transecting techniques without the use of graft augmentation are typically deployed. However, for lengthy bulbar strictures (≥2cm), many advocate for oral mucosa substitution urethroplasty due to the theoretical concern of penile shortening, tethering, or other erectile function related side effects. Although effective, substitution bulbar urethroplasty is associated with additional graft harvest morbidity and may have lower success rates relative to non-substitution non-transecting techniques. Objective We describe outcomes of an extended non-transecting excision-anastomosis urethroplasty for lengthy urethral strictures without the use of graft augmentation. Methods A tertiary center’s urethroplasty database was queried for patients that underwent non-transecting bulbar urethroplasty from 2017-2023. Patients with penile urethral strictures or concurrent urethroplasty procedures were excluded. Stretch penile length (SPL) was assessed by applying gentle traction on the penis and measuring from the base of the penis to the tip of the glans. SPL was assessed perioperatively and at 3-6 month follow-up. Urethral stricture recurrence was defined as need for repeat urethral intervention. Urethral stricture length was determined by intra-operative measurement. Accordingly, patients were then stratified based on stricture length (<2 cm vs ≥2 cm) and tested for association between categorical outcomes (worsening erectile function and reconstructive success) and continuous outcomes (change in SPL) using Fischer’s exact test and Mann Whitney U test. Results A final cohort of 90 patients were identified, with a median urethral stricture length of 1.5 cm (range 0.5-6cm). In addition to dorsal urethrotomy (median 3cm), ventral mucosectomy was performed in 29 (32%) patients (median 2cm). Early postoperative complications occurred in 13 (15%) including UTI (N=4), contrast extravasation at VCUG (N=3), and epididymo-orchitis (N=3). At a median follow up of 13 months (IQR 4-18), a total of 5.5% (5/90) developed stricture recurrence. The overall median change in SPL was 0% (IQR 0-6.7%). De novo ED occurred in 7% (5/67). When stratified by stricture length ≥2cm (N=41) and <2cm (N=49) median length of urethrotomy was 3 cm (2.6-4.0) vs 2 cm (2.0-3.0; p <0.001), respectively. Those with strictures ≥2 cm had greater decreases in relative SPL (median 3.5% vs. 0%, p = 0.003) and higher absolute PVR (median 71 ml vs. 34 ml, p =0.03) at 3 months after surgery. There were no significant differences in relative improvement of Qmax or PVR, stricture recurrence (8% vs 4%), worsening erectile function (10% vs 6%), or complication rates (15% vs 14%) between groups (p-value> 0.05 for all comparisons). Conclusions Spongiosal sparing non-transecting urethroplasty is an effective surgical option for patients with lengthy urethral strictures. It offers comparable relative improvement in functional (Qmax, PVR) and erectile function outcomes, while having a modest impact on SPL all while avoiding the morbidity of graft harvesting. Disclosure No.