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Artificial Urinary Sphincter Implantation Zhang and Liao BMC Urology (2018) 18:3 DOI 10.1186/s12894-018-0314-y RESEARCH ARTICLE Open Access Artificial urinary sphincter implantation: an important component of complex surgery for urinary tract reconstruction in patients with refractory urinary incontinence Fan Zhang1,2 and Limin Liao1,2* Abstract Background: We review our outcomes and experience of artificial urinary sphincter implantation for patients with refractory urinary incontinence from different causes. Methods: Between April 2002 and May 2017, a total of 32 patients (median age, 40.8 years) with urinary incontinence had undergone artificial urinary sphincter placement during urinary tract reconstruction. Eighteen patients (56.3%) were urethral injuries associated urinary incontinence, 9 (28.1%) had neurogenic urinary incontinence and 5 (15.6%) were post-prostatectomy incontinence. Necessary surgeries were conducted before artificial urinary sphincter placement as staged procedures, including urethral strictures incision, sphincterotomy, and augmentation cystoplasty. Results: The mean follow-up time was 39 months. At the latest visit, 25 patients (78.1%) maintained the original artificial urinary sphincter. Four patients (12.5%) had artificial urinary sphincter revisions. Explantations were performed in three patients. Twenty-four patients were socially continent, leading to the overall success rate as 75%. The complication rate was 28.1%; including infections (n = 4), erosions (n = 4), and mechanical failure (n = 1). The impact of urinary incontinence on the quality of life measured by the visual analogue scale dropped from 7.0 ± 1.2 to 2.2 ± 1.5 (P <0.001). Conclusions: The primary sources for artificial urinary sphincter implantation in our center are unique, and the procedure is an effective treatment as a part of urinary tract reconstruction in complicated urinary incontinence cases with complex etiology. Keywords: Artificial urinary sphincter, Urinary tract reconstruction, Refractory urinary incontinence, Outcomes Background AUS placement is primarily performed in men with Artificial urinary sphincter (AUS) implantation is a well- post-radical prostatectomy (RP) incontinence [4]; there established treatment for refractory stress urinary incon- is scant published data for other etiologies [1–3, 5]. tinence (SUI) resulting from intrinsic sphincter deficiency Interestingly, the majority priority cases for AUS im- (ISD) [1]. It is versatile and effective in a wide range of sit- plantation in our institute have been incontinence sec- uations, including post-prostatectomy incontinence (PPI) ondary to urethral injuries and neurogenic cases. A or other urethral surgery-related incontinence, traumatic series of urinary tract reconstruction (UTR) might be urethral disruption as a result of a prior pelvic fracture, needed combining AUS placement and other additional radical pelvic surgery, neurogenic causes, and as a salvage procedures in complex cases [3]. The type of injury, pos- procedure after other treatments have failed [2, 3]. sibility of a previous failed repair, relatively restricted surgical access, or urethral stricture, together with inher- ent detrusor-sphincter dysfunction, make UTR more complicated [6]. Thus, the quality and choice of manage- * Correspondence: [email protected] 1Department of Urology, China Rehabilitation Research Center, Beijing ment modalities should be tailored to the unique needs 100068, China of each individual. The purpose of this study was to 2Department of Urology, Capital Medical University, Beijing, China © The Author(s). 2018 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. Zhang and Liao BMC Urology (2018) 18:3 Page 2 of 7 present our experience of AUS implantation as a part of Table 1 Clinic characteristics of the patients treated with an UTR for patients with complex and refractory urinary artificial urinary sphincter (n = 32) incontinence (UI). Characteristics Value Number of patients 32 Age (yrs) 40.78 ± 16. 58 Methods Mean follow-up time (yrs) 3.3 ± 0.7 Subjects Type UI With the approval of the Ethics Committee of the China PFUI 18 (56.3%) Rehabilitation Research Center, we reviewed 32 patients NB 9 (28.1%) (31 males and 1 female) who underwent AUS placement TURP 3 (9.4%) (AMS 800; American Medical Systems, Minnetonka, RP 2 (6.2%) MN, USA) for the treatment of UI secondary to different Number of previous surgeries for UI causes (April 2002 to May 2017). Written informed con- 0–1 10 (31.3%) sent for participation was obtained from all participants 2 5 (15.6%) 3 5 (15.6%) in the study. All participants were adults and the mean ≥ 4 12 (37.5%) age was 40.78 ± 16.58 years. Eighteen patients (56.3%) Cuff size had pelvic fracture-associated urethral injuries (PFUI) 4cm 21 (65.6%) (car accident or fall down) that were initially treated 4.5 cm 10 (31.3%) elsewhere and presented to us 8 months to 30 years after 8cm 1 (3.1%)* the injury with intractable incontinence, nine of Operative approach whom developed urethral stricture after the Bank’s transperineal 16 (50%) method and had recurrent contractures after initial trans-scrotal 15 (46.9%) management; two underwent male slings surgeries but trans-retropubic 1 (3.1%) had recurrent incontinence. Nine patients (28.1%) had transcorporal (intracavernous) 1* neurogenic bladder (NB) dysfunction (meningomyelo- Values are presented as the mean (±standard deviation) or number (%) PFUI pelvic fracture-associated urethral injuries, NB neurogenic bladder, TURP cele, 5; spinal cord injury, 4) and 5 (15.6%) underwent transurethral resection of the prostate, RP radical prostatectomy. *8 cm cuff prostatectomies (Table 1). The consent to publish was implanted on the female case. *One transperineal case had a transcorporal these information (age and detailed medical history) approach implantation when revised was obtained from all participants. The pre-implantation evaluation comprised a clinical AUS implantation was performed as the standard interview, surgical history, analysis of voiding diaries procedure [2. 3]. Sixteen patients (50%) had the trans- (time and voided volumes, pad changes, and UI epi- perineal approach (two incisions) and 15 (46.9%) had sodes), physical examination, urinalysis, and urine cul- the advanced trans-scrotal approach (one incision); ture. More invasive testing included urethrography and based on individual local skin conditions. The female video-urodynamic assessment. Cystourethroscopy was case had a trans-retropubic approach. Intravenous an- required to verify urethral integrity, bladder neck pa- tibiotics (ceftriaxone and vancomycin) were given tency, and vesicourethral anastomotic strictures. Ultra- within 12 h prior to AUS surgery. Under general or sound was routinely used to assess the upper urinary spinal anesthesia, all patients were placed in the lithot- tract (UUT) and post-void residual urine. The UUT was omy position and the perineum was generously also evaluated by magnetic resonance urography (MRU). prepped with an alcohol and Betadine solution. Then, a Foley catheter with 8F–16F was inserted into the Surgical technique bladder. The AUS cuffs were placed at the bulbar ur- According to patients’ individual condition, the following ethra for the male cases and the bladder neck for the operations were conducted before AUS placement, in- female case. The pump and balloon were implanted in cluding two strictures incision, three sphincterotomies, the scrotum or labium majus and abdomen, respect- and five urethral dilations in urethral injuries associated ively. The balloon pressure was 61–70 cm H2Oinall UI patients due to the refractory urethral stricture post cases. The indwelling catheter remained in situ for the Bank’s method; four patients with neurogenic UI under- first 24 h, then switched to an external urine collec- went sphincterotomies or urethral dilations out of de- tion device before system activation (4–6weekspost- trusor sphincter dyssynergia (DSD), 3 subsequently had operatively). Antibiotic prophylaxis was maintained augmentation cystoplasties. A urethral stricture was in- 3 days post-operatively, followed by 2 weeks of oral cised in one PPI patient. These surgeries were performed ciprofloxacin. The length of hospital stay ranged 3–6 months prior to AUS implantation as staged proce- from 5 to 7 weeks, including 1 week of pre- dures in the series of UTR (Table 2). operative evaluation and 4–6weekspost-operative Zhang and Liao BMC Urology (2018) 18:3 Page 3 of 7 Table 2 Patient operative history and treatment measures before AUS implantation Number of Etiology Previous procedures (Times) Least treatment to Our treatment Complications Management patients (N = 32) AUS interval (Yrs) before AUS 1 PFUI Upl,Spl,USD,USI 21 USD none none 2 PFUI Upl,RV 0.5 cystoscopy* none none 3 NB spondylolysis none cystoscopy dysuria revision 4 NB Cty 3 Sty + AC infection, erosion explantation 5 1st time NB Cty 1 Sty RI revision explantation 2nd time AUS(RI) 0.5 cuff removal infection 6 PFUI Upl,Spl,USD,USI 2 Sty RI, erosion explantation
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