Transurethral implantation of macroplastique for the treatment of female stress urinary incontinence secondary to urethral sphincter deficiency

Abstract

Objective: To assess the results of transurethral implantation of Macroplastique in women with stress incontinence secondary to urethral sphincter deficiency using subjective and objective outcome measures.

Methods: A total of 60 women with genuine stress incontinence secondary to intrinsic urethral sphincter deficiency were treated with transurethral implantation of Macroplastique. The patients had undergone a mean of 1.9 (range 0-7) previous episodes of continence surgery. Up to three treatment episodes were used, if necessary. The outcome was assessed by telephone interview (56 patients, mean follow-up period 19 months) and videocystometry (41 patients, mean follow-up period 16 months). Transurethral ultrasound scanning was performed in a further 9 patients.

Results: Symptomatically, 19.6% of the women interviewed by telephone considered themselves cured of their incontinence or were no longer using pads. A further 41.1% said their symptoms had significantly improved. Pad usage was reduced from a median of five to three pads per day (p < 0.001). Videocystometry in 41 women (mean follow-up period 16 months) was normal in 16 patients (39%) and showed genuine stress incontinence in 18 (43.9%) and detrusor instability in 12 patients (29.3%). Overall, 71.4% stated that they would undergo the procedure again under the same circumstances, and 80.4% would recommend this form of treatment to a friend with the same condition. Transurethral ultrasound scanning was performed in 9 patients (5 subjectively improved or cured, 1 patient with persistent symptoms but normal cystometry, and 3 patients with persistent genuine stress incontinence). Hyperechoic foci were seen surrounding the proximal urethra, consistent with implanted Macroplastique boluses. When completely encircling the urethra, the outcome was generally good. A total of 10 patients have undergone or are awaiting open surgery, and 3 are awaiting repeat implantation.

Conclusion: Sustained improvement or cure of genuine stress incontinence has been achieved using Macroplastique in a large proportion of women with intrinsic sphincter deficiency, often following previous unsuccessful continence surgery. Transurethral ultrasound may prove to be a clinically useful imaging technique for the assessment and subsequent management of treatment failure following Macroplastique implantation.