Collagen injection in the management of post-radical prostatectomy intrinsic sphincteric deficiency

R Tiguert, E L Gheiler, M R Gudziak
Neurourology and Urodynamics 1999, 18 (6): 653-8
Transurethral injection of collagen is a minimally invasive option for the treatment of urinary incontinence secondary to intrinsic sphincteric deficiency (ISD). We report on the results of transurethral injection in 21 men with urinary incontinence secondary to ISD. Twenty-one consecutive men with a mean age of 69.5 years (range, 51-84), with ISD documented by demonstrating urinary leakage with Valsalva maneuver on physical examination and by video-urodynamic studies were treated with transurethral collagen injection. The etiologies of the incontinence were radical retropubic prostatectomy (RRP) in seven (33.3%), RRP followed by external radiation therapy in seven (33.3%), and transurethral resection of the prostate (TURP) with subsequent RRP in seven (33. 3%). The mean total volume of collagen injected per patient was 18.4 mL (range, 1-44.5). The average number of injections was 2.9 (range, 1-5). The mean follow-up was 12.5 months (range, 1-39). One (5%) patient became dry, 12 (57%) had significant improvement, and eight (38%) had no change. Overall pad use decreased from 2.5 pads/day to 1.68 pads/day, before and after collagen injection (P = 0.014). No difference in outcomes was demonstrated in African American men versus Caucasian American men (P = 0.38), age (<65 and >65 years, P = 0.88), presence of erectile dysfunction, or duration of incontinence (<20 or >20 months, P = 0.71). There were no reported complications. Collagen injection has minimal morbidity and is a viable option for improving incontinence status in men. Neither age, race, erectile function, nor duration of incontinence appears to affect treatment outcome. Neurourol. Urodynam. 18:653-658, 1999.

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