Prosthetic urinary bladder implantation to facilitate bladder regeneration

A temporary artificial bladder was implanted in 15 female dogs undergoing total or subtotal cystectomy. One or two months after implantation, the prosthesis was removed. In three dogs sacrificed 6 months after prosthesis implantation, a new urinary reservoir was identified. Two dogs failed to develop a urinary reservoir, and both ureters anastomosed directly to the top of a dilated urethra. Seven dogs died from complications (infection, urine leakage, etc). Three additional dogs are alive and well 2.5 months after implantation, and in these animals a new urinary reservoir has been demonstrated by cystography. Histologic examination of the new urinary reservoir revealed a thin lining of transitional cell-like epithelium and an underlying attenuated muscle layer. The ability of the canine species to generate a functioning urinary reservoir after total or subtotal cystectomy may hold promise for eventual clinical application in humans.     

Automatic evaluation of ultrasonography-estimated bladder weight and bladder wall thickness in community-dwelling men with presumably normal bladder function

Study Type – Diagnostic (exploratory cohort) Level of Evidence 2b What's known on the subject? and What does the study add? The diagnostic potential of ultrasound derived measurements of bladder wall thickness and bladder weight in men with LUTS and varying degrees of BOO have been explored. However, there is a paucity of such measurements in the asymptomatic population with which to compare such patients. This study investigates these measurements in community‐dwelling men with presumably normal bladder function.

OBJECTIVE

• ? To identify measurements of ultrasonography (US)‐derived bladder wall thickness (BWT) and bladder weight in community‐dwelling men with presumably normal bladder function.

SUBJECTS AND METHODS

• ? A total of 100 male volunteers underwent transabdominal US measurements of BWT and bladder weight, using the BVM 9500 bladder scanner (Verathon Medical, Bothell, WA, USA), at a variety of bladder filling volumes.
• ? The data were explored for any correlation between measurements of BWT and US‐estimated bladder weight (UEBW) with subject age, height, weight, body mass index (BMI), International Consultation on Incontinence Questionnaire – Male Lower Urinary Tract Symptoms (ICIQ M‐LUTS) score, International Prostate Symptom Score (IPSS) and IPSS Quality of Life index (IPSS QoL).

RESULTS

• ? Several statistically significant but weak correlations were observed: BWT and weight (r= 0.216, P= 0.032); BWT and BMI (r= 0.246, P= 0.014); UEBW and weight (r= 0.304, P= 0.002); and UEBW and BMI (r= 0.260, P= 0.009).
• ? Bladder filling volume appeared to have a greater effect on BWT than on UEBW, although this could not be determined accurately.
• ? There was a substantial difference in measurements of BWT and UEBW in the assessment of inter‐ and intra‐observer reliability testing.

CONCLUSION

• ? Further studies are required to validate automated measurements of BWT and UEBW and to investigate such measurements in the symptomatic and asymptomatic male population.

     

两种膀胱扩大术治疗神经源性膀胱比较分析

目的:比较膀胱自扩大术和回肠膀胱扩大术治疗神经源性膀胱的临床效果。方法:回顾分析膀胱自扩大术10例,回肠膀胱扩大术13例患者临床资料,对两种术式的手术方法,手术前后患者膀胱容量,肾功能以及临床症状进行比较。结果:膀胱自扩大术和回肠膀胱扩大术的患者术后平均安全膀胱容量显著增多,分别为(178.2±31.8)vs(420.7±54.9)ml,(115.9±19.5)vs(517.4±48.3)ml(P<0.05),顺应性明显改善。前者尿失禁消失8例,明显改善1例;术后血清肌酐水平恢复正常6例,明显下降2例,肾积水明显缓解或消失,未发现膀胱输尿管反流现象;后者尿失禁消失9例,明显改善2例,血清肌酐水平6例恢复正常,1例明显下降,肾积水情况均较术前明显缓解或消失,膀胱输尿管反流消失;术后3例出现尿路感染;1例轻微漏尿;1例出现腹泻;3例出现肠梗阻;2例出现膀胱结石,均对症处理后好转。结论:膀胱自扩大术较为简单、安全,但其适应证把握应慎重。回肠膀胱扩大术是治疗神经源性膀胱有效的手术方式,其适应证相对广,但并发症较多。     

膀胱出口梗阻大鼠膀胱过度活动的研究

目的:建立膀胱出口梗阻大鼠模型,诱发逼尿肌不稳定(DI),研究膀胱出口梗阻伴发膀胱过度活动的病理生理学特征。方法:选择38只成年SD雌性大鼠,随机分为模型组和对照组,结扎膀胱颈部建立膀胱出口梗阻模型。建模后3、6、9、12周采用BL-410生物机能实验系统测定膀胱压,以充盈期出现DI作为膀胱过度活动存在的标准,记录并计算DI阳性率和频率、最大排尿压(MVP)、最大膀胱容量(MCC)、膀胱顺应性(BC)和剩余尿量(PVR)。用光镜观察建模不同时期膀胱组织的病理学改变。结果:模型组大鼠3、6、9、12周DI阳性率分别为37.50%、75.00%、75.00%、62.50%。MVP、MCC、BC、PVR和DI频率较对照组增高(P<0.01),第9周大鼠PVR、MVP、MCC高于第3、6和12周。不同时期病理学改变呈现出膀胱容量增加、肌层逐渐增厚和纤维化的过程。结论:膀胱出口梗阻与逼尿肌不稳定的发生具有潜在的相关性,其病理学改变和尿流动力学参数反映了膀胱的病理生理学特点。     

经尿道膀胱肿瘤电切术后膀胱灌注吡柔比星治疗浅表性膀胱肿瘤42例报告

目的探讨吡柔比星膀胱灌注对治疗浅表性膀胱癌术后复发的预防效果。方法42例患者,在行经尿道膀胱肿瘤电切术（TURBt）术后定期经导尿管给予膀胱内灌注吡柔比星30mg／40ml,每周1次,每次膀胱内保留60min,共8次,术后3个月行1次膀胱镜检查。结果共有4例复发。42例患者有不同程度的膀胱区不适,3例症状较重。结论吡柔比星膀胱内灌注预防肿瘤术后复发疗效显著、安全、可靠。     

Simplified bladder training augments the effectiveness of tolterodine in patients with an overactive bladder

OBJECTIVES: To compare the efficacy of tolterodine plus simplified bladder training (BT) with tolterodine alone in patients with an overactive bladder. PATIENTS AND METHODS: In a multicentre, single-blind study at 51 Scandinavian centres, 505 patients aged >or= 18 years with symptoms of urinary frequency (>or= 8 micturitions/24 h) and urgency, with or without urge incontinence, were randomized to oral treatment with either tolterodine 2 mg twice daily plus simplified BT or tolterodine alone. Changes in voiding diary variables were evaluated after 2, 12 and 24 weeks of treatment. The patients' perceptions of their bladder symptoms and tolerability (adverse events) were also determined. RESULTS: In all, 501 patients (75% women) were evaluable on an intention-to-treat basis (244 on tolterodine + BT and 257 on tolterodine alone). Tolterodine significantly reduced the voiding frequency and increased the volume voided per void at all sample times; these effects were significantly increased by adding BT. At the end of the study the median percentage reduction in voiding frequency was greater with tolterodine + BT than with tolterodine alone (33% vs 25%, P < 0.001), while the median percentage increase in volume voided per void was 31% with tolterodine + BT and 20% with tolterodine alone (P < 0.001). There was a median of 81% fewer incontinence episodes than at baseline with tolterodine alone, which was not significantly different from that with tolterodine + BT (- 87%). The two groups had comparable median percentage reductions in urgency episodes. Some 76% of patients on tolterodine + BT reported an improvement in their bladder symptoms relative to baseline, compared with 71% on tolterodine alone. Tolterodine was well tolerated; the most common adverse event was mild dry mouth. CONCLUSION: Tolterodine 2 mg twice daily is an effective and well tolerated treatment for an overactive bladder, the effectiveness of which can be augmented by a simplified BT regimen.     

保留膀胱手术治疗肌层浸润性膀胱癌临床分析

目的:探讨肌层浸润性膀胱癌(muscle invasive bladder cancer,MIBC)行保留膀胱手术治疗的可行性及临床价值。方法:回顾性分析43例MIBC患者的临床资料:男28例,女15例,年龄45～88岁,平均62岁。其中38例(88.4%)行经尿道膀胱肿瘤电切除术(transurethral resection of bladder tumor,TURBT),5例(11.6%)行膀胱部分切除术;术后均行膀胱灌注化疗或放疗。结果:术后病理分期:T236例(83.7%),T37例(16.3%);病理分级:G14例(9.3%),G231例(72.1%),G38例(18.6%)。术后随访6～126个月,平均63.2个月;首次复发为3～20周,平均10.2周,复发次数1～8次,平均3.7次;共行2～9次TURBT,平均3.5次,其中25例(58.1%)于≥3次TURBT后出现病理性进展,9例(20.9%)于术后复发次数≥3次后改行根治术;2例(4.7%)死于非膀胱癌疾病,1例(2.3%,病理为T2G1)于首次术后126个月死于膀胱癌多发转移。结论:对于MIBC,可选择性行以TURBT为主加放化疗的保留膀胱手术治疗,但具有反复复发及进展倾向;首次复查膀胱镜时间需提前到术后4～8周,远期疗效需进一步评估。     

Relative bladder outlet obstruction

PURPOSE: Currently bladder outlet obstruction in males is defined by the provisional International Continence Society nomogram which is partly based on expert opinion and partly on measurements before and after transurethral prostate resection. Recently there has been some interest in the development of a similar nomogram for females. MATERIALS AND METHODS: We studied the possibility of defining bladder outlet obstruction based on a sign that it causes, namely post-void residual urine. RESULTS: The probability of relative post-void residual urine exceeding 20% of bladder capacity was modeled in males and females using 1 parameter, that is URA/w20 or the ratio of the obstruction parameter urethral resistance factor (URA)-to-the bladder contractility parameter Watts factor at 20% (w20). URA/w20 represents relative bladder outlet resistance or bladder outlet resistance normalized to bladder contractility. Above a threshold of URA/w20 = 6.8 in females and 8.2 in males a relative post-void residual exceeding 20% was noted in 90% of measurements. These thresholds may be used to define relative obstruction. The provisional International Continence Society nomogram for obstruction in males was transformed into an identical nomogram for females by equating the probabilities of post-void residual urine in each gender. The latter differed from that in men, in that the lines demarcating the zones were horizontal or flow rate independent but the intercepts were approximately the same at 20 and 40 cm. water. CONCLUSIONS: Instead of defining obstruction as an absolute level of bladder outlet resistance we suggest that it is better to define it relatively, that is as a level of bladder outlet resistance that depends on bladder contractility.     

Lipomatosis of the bladder presenting as bladder cancer

A case of bladder lipomatosis in an 81-year-old man is presented. The preoperative diagnosis was bladder tumor. A transurethral resection of the bladder was performed and a pathological examination revealed lipomatosis of the bladder. This entity is extremely rare and, to our knowledge, this is the second case reported in the English published works.     

Cystometric evaluation of bladder function in non-anesthetized mice with and without bladder outlet obstruction

PURPOSE: To develop a model for cystometric study of bladder function in the awake mouse, and to characterize urodynamically and immunohistochemically the non-obstructed and infravesically obstructed mouse bladder. MATERIALS AND METHODS: Non-obstructed Balb/CJ mice, and mice with bladder outlet obstruction after surgical, partial ligation of the urethra underwent continuous cystometry as previously described for rats. Bladders were also investigated by immunohistochemistry. RESULTS: During the period of cystometry, reproducible micturition patterns were obtained. Marked differences in the urodynamic parameters between non-obstructed and obstructed mice were revealed. In mice subjected to urethral obstruction, micturition pressure (p <0.05), threshold pressure (p <0.05), bladder capacity (p <0.001), micturition volume (p <0.001), and residual volume (p <0.05) increased significantly. There was no difference in basal pressure or compliance between non-obstructed and obstructed mice. Non-voiding bladder activity was consistently recorded in obstructed mice; both frequency and amplitude increased significantly (p <0.01). Compared with non-obstructed bladders, obstructed bladders showed hypertrophy of the bladder wall and various degrees of "patchy denervation" of the detrusor. When tested in non-obstructed mice capsaicin, prostaglandin E2 (intravesical administration) and apomorphine (subcutaneous administration) induced bladder overactivity. CONCLUSIONS: Continuous cystometry can be reproducibly performed in awake, freely moving non-obstructed mice and mice with bladder outflow obstruction. The changes induced by infravesical obstruction in mice were similar to those previously found in rats. This model may be useful for investigations of genetically modified mice.     

Results of umbilicoplasty for bladder exstrophy

PURPOSE: The umbilicus is an important aesthetic landmark and its absence or deformity may be associated with poor self-image. In patients born with bladder exstrophy the umbilicus is attached to the upper margin of the bladder and reconstructive surgery often removes the navel. The umbilicus marks the waistline and serves to complete the harmony of the curved lines above and below the waist. We present our experience with children born with exstrophic anomalies during the last 2 decades. MATERIALS AND METHODS: Our database included 61 children born with classic bladder and 8 born with cloacal exstrophy treated between 1980 and 1998. We performed primary reconstruction in 35 children, while 34 children and young adults were referred for secondary surgical repair, including bladder augmentation, continent diversion, genitoplasty and so forth. Neoumbilicoplasty was done in all of the former and in 30 of the 34 latter cases. Early in the series a V-shaped flap was raised and buried subcutaneously. The flap eventually became a tube around the cystotomy tube and the cicatrix formed the umbilical dimple. This method necessitated packing with iodoform gauze for 4 weeks with weekly dressing. The technique evolved into a tubularized U-shaped flap. A rubber tube was placed indwelling as a stent to maintain inward projection of the neoumbilicus. RESULTS: In 66 of the 69 cases the early results of umbilicoplasty were described by the surgeon as excellent or satisfactory. In 3 cases the neoumbilicus appeared flat, lost depth and was described as unsatisfactory. Long-term followup of more than 1 year was available in 48 patients, of whom 2 underwent umbilical repositioning for an off center or low umbilicus and 3 underwent repeat umbilicoplasty for a flat umbilicus that had lost depth. The best cosmetic results were achieved in patients with a relatively thick layer of subcutaneous fat, whereas cosmesis was suboptimal in thin children. Nevertheless, the patients and parents were generally pleased with the umbilical appearance even when the surgeon was not. CONCLUSIONS: Although the navel is a functionless depressed scar, it represents an important and pleasing landmark. Umbilical construction should be attempted early during functional closure or urinary diversion.     

经尿道膀胱颈内切开术治疗女性膀胱颈梗阻的疗效观察

目的:评估经尿道膀胱颈内切开术治疗女性原发性膀胱颈梗阻(PBNO)的长期疗效。方法:56例女性患者通过排泄性膀胱尿道造影及尿动力学检查确诊为PBNO,在膀胱颈上选取2点及10点位置,所有患者行经尿道膀胱颈内切开术。结果:术后随访6~72个月(平均26.2个月)。56例接受手术的患者中47例(83.9%)术后恢复良好,未见严重并发症。随访过程中,平均国际前列腺症状评分(IPSS)由21.2降至7.6(P<0.05),生活质量评分(QOL)由4.2降至2.3(P<0.05),最大尿流率(Q_max)由8.63ml/s增至17.36ml/s(P<0.05),残余尿量(PVR)由106.32ml降至21.46ml(P<0.05),最大尿流率时逼尿肌压力(Pdet at Q_max)由68.42cmH_2O降至19.86cmH_2O(1cmH_2O=0.098kPa,P<0.05)。术后出现的并发症有血尿、二次行膀胱颈内切开术、压力性尿失禁、尿道狭窄。所有这些并发症按Clavien分类评估为Ⅲa级。3例(5.3%)术后出现出血,经延长尿管留置时间、膀胱冲洗治愈,均未输血治疗;4例(7.1%)出现压力性尿失禁,行经阴道无张力尿道中段吊带术后恢复;4例(7.1%)出现尿道狭窄,间断尿道扩张后好转。结论:PBNO不常见,排泄性膀胱尿道造影及尿动力学检查可确诊,通过经尿道膀胱颈内切开术治疗安全有效。在膀胱颈的2点和10点方向仔细地、足够深度地行颈内切开可以保证手术的成功。     

Possible use of ultrasonically-estimated bladder weight in patients with neurogenic bladder dysfunction

In 25 patients with detrusor areflexia, ultrasonically-estimated bladder weight (UEBW) was compared with bladder capacity and compliance obtained by cystometry, and UEBW was also compared with grade of bladder deformity as evaluated by cystography. UEBW correlated significantly with compliance (P < 0.01) and degree of bladder deformity (P < 0.01). Taking a cutoff value of 40 g, UEBW revealed diagnostic accuracy as high as 96% and 80% for low-compliance (< 10 ml/cm H₂O) and high-grade deformity (grade II/III), respectively. UEBW could be a new urodynamic parameter capable of evaluating functional as well as morphological changes of the bladder. © 1996 Wiley-Liss, Inc.     

Effect of chronic bladder outlet obstruction on blood flow of the rabbit bladder

PURPOSE: Previous studies have shown that the initial reaction of the rabbit bladder to partial bladder outlet obstruction is increased blood flow at day 1 and a return to baseline blood flow at 1 week. Mucosal and muscle blood flow followed this pattern but mucosal blood flow was always 4 to 5-fold greater. In this study we examined the effect of 4 weeks of outlet obstruction on bladder blood flow and correlated it with the severity of bladder contractile dysfunction. MATERIALS AND METHODS: A total of 14 male New Zealand White rabbits underwent partial outlet obstruction creation by standard methods. After 4 weeks the rabbits were anesthetized, and blood flow to the muscle and mucosa was determined by standard fluorescent microsphere technique. A section of each detrusor was used for in vitro contractility studies. Contractile responses to field stimulation, carbachol and potassium chloride were determined. A section of each detrusor tissue was fixed in formalin and used to determine the smooth muscle volume fraction. RESULTS: Four weeks of partial bladder outlet obstruction caused a significant and variable increase in bladder weight and a decrease in blood flow to bladder muscle without changes in the blood flow to mucosa. There was a clear correlation between the severity of contractile dysfunction, bladder weight and the magnitude of the decrease in blood flow in muscle. The smooth muscle volume fraction remained stable at approximately 40%. CONCLUSIONS: Bladder decompensation was associated with decreased blood flow to bladder smooth muscle. Because compensated obstructed bladders with relatively normal contractile function are also hypertrophied but have normal blood flow, decreased blood flow in decompensated bladders is not simply a response to bladder hypertrophy. From this study we hypothesize that decreased blood flow to bladder smooth muscle is an etiological factor in bladder contractile dysfunction (bladder decompensation) secondary to partial outlet obstruction.     

Treatment of primary bladder neck obstruction in women with transurethral resection of the bladder neck

PURPOSE: We describe the presentation, clinical characteristics, treatment and followup of a series of women with primary bladder neck obstruction (PBNO). MATERIALS AND METHODS: A patient data base was searched for women who underwent transurethral resection for bladder outlet obstruction diagnosed by videourodynamic study (VUDS) according to the Blaivas-Groutz nomogram for female bladder outlet obstruction between 1993 and 2002. A total of 37 women with obstruction were identified. Patients with neurogenic, traumatic, anatomical or iatrogenic causes of obstruction were excluded. Seven patients remained who had been diagnosed with PBNO, of whom all underwent transurethral bladder neck resection. Office records were reviewed for history, presentation, surgical treatment and clinical outcome. RESULTS: Seven patients were diagnosed with PBNO. Age was 39 to 81 years. Six of 7 patients presented with symptoms of obstruction, including a weak or intermittent stream and urinary hesitancy. These 6 patients had unremarkable physical examination findings with normal perianal sensation, anal sphincter tone and lower extremity reflexes. One patient presented with abdominal swelling, which on physical examination was found to be a markedly distended bladder containing more than 1000 cc urine. All patients had overt urethral obstruction on VUDS. In 6 of 7 patients obstruction was clearly at the vesical neck and in 1 the obstruction site was equivocal. Three patients were treated or had previously been treated pharmacologically with alpha-blockers. All patients were subsequently treated with intermittent self-catheterization. All patients then underwent transurethral bladder neck resection at the vesical neck and proximal urethra. Surgical specimens weighed 1 to 5 gm and showed urethral fragments or fibromuscular tissue without specific pathological findings. Followup was 1 to 10 years (median 3) and it included physical examination, uroflowmetry, post-void residual urine measurement and videourodynamic study. Six patients considered themselves cured of lower urinary tract symptoms and 1 was improved. In 1 patient the obstruction site was not clear. One patient had mild stress incontinence under rare circumstances not severe enough to require protective pads. The average change in flow was 6 +/- 10 vs 30 +/- 17 ml per second (p <0.03). The average change in voided volume was 194 +/- 170 vs 416 +/- 206 ml per second (p <0.06). Average change in post-void residual urine was 680 +/- 445 vs 173 +/- 366 ml (p <0.05). CONCLUSIONS: PBNO is an exceedingly rare condition, which is easily treatable when properly diagnosed by VUDS. The presentation of patients in urinary retention in middle age suggests that PBNO may be more common in less apparent forms than has previously been recognized.     

Urinary bladder bilharziasis as a cause of impaired bladder muscle contractility

In an attempt to evaluate the effect of bilharziasis on bladder contractility as a factor in the genesis of voiding disorders, 44 cases of bilharzial bladder neck obstruction diagnosed using traditional methods (symptomatological, radiographic, and endoscopic) were subjected to complete urodynamic evaluation (flowmetry, cystometry, pressure/flow study, and stop-flow test). Their parameters were compared with those of 28 patients with urodynamically obstructed benign prostatic hyperplasia and 8 nonsymptomatic controls. Contractility parameters (isometric detrusor pressure, maximum estimated flow rate, detrusor power at maximum flow) were calculated for the studied cases and their distribution according to the Schafer pressure/flow diagram was evaluated. Bladder biopsy including the detrusor was evaluated in all 72 patients. Poor bladder contractility associated with an extensive bilharzial effect on the detrusor muscle was found to be the major abnormality in 20 of 44 patients with presumed bilharzial bladder neck obstruction with no evidence of urodynamic outflow obstruction. We believe such a workup is essential in cases of suspected obstruction associated with bilharziasis to throw light on the pathophysiology of the voiding disorders, avoid unnecessary surgery, and provide a better prognosis. Neurourol. Urodynam. 17:483–492, 1998. © 1998 Wiley-Liss, Inc.