Funktionelle Ergebnisse nach Laservaporisation der Prostata mit dem KTP-Laser

Background

Treatment for bladder outlet obstruction (BOO) caused by benign prostatic hyperplasia (BPH) impairs the quality of life. The potassium tintanyl phosphate (KTP) vaporisation of the prostate offers promising modalities in treatment of BOO. We prospectively determined the impact of KTP-lasertherapy on voiding function, quality of life and sexual function.

Patients and methods

So far a total of n=123 patients complaining of syptomatic BPH were treated with an 80 watt Laser. N= 40 of them agreed to participate in the study and were evaluated prospectively. Preoperative pressure-flow-studies verified significant bladder outlet obstruction in all cases. Disease specific quality of life and sexual function were assessed using the International Prostate Symptom Score (IPSS) and International Inventory of Erectile Function (IIEF). Three months after treatment follow-up video-urodynamics were carried out to determine changements in pressure flow and bladder function.

Results

All patients showed significant improvement after a hospital stay of 4,9 days. The maximum flow rate increased from 9,1 ml/sec preoperatively to 20,2 ml/sec and the amount of residual urine decreased from 98 ml preoperatively to 17 ml immediately after removal of the catheter. Urodynamics after the follow up period showed that the maximum urinary flow improved from 9.7 ml/s preoperatively to 17,6 ml/s and the volume of residual urine decreased from a median of 127.5 ml preoperatively to 45ml postoperatively. The IPSS and IIEF decreased from a median of 20,4 preoperatively to 8,16 and from a median of 14 preoperatively to 12,7 respectively. The pressure-flow study verified the desobstruction and showed a decline in detrusor pressure at maximum flow from 76,66 cm H₂O to 33,79 cm H₂O. The urethral opening pressure sank from 75.86 cm H₂O preoperatively to 37,51 cm H₂O postoperatively.

Conclusion

The potassium tintanyl phosphate (KTP) vaporisation of the prostate is a promising new method in the treatment of benign prostatic hyperplasia as shown by the data. Beside its low perioperativ and postoperative morbidity due to a high hemostatic property it offers a good tissue debulking effect.     

Functional outcome following photoselective vaporisation of the prostate (PVP): urodynamic findings within 12 months follow-up

OBJECTIVES: We determined the impact of potassium-titanyl-phosphate (KTP) laser therapy of the prostate on urodynamic results, voiding function, quality of life, and sexual function. DESIGN, SETTING, AND PARTICIPANTS: Forty-five patients complaining of symptomatic benign prostatic hyperplasia (BPH) and urodynamically proven obstructive voiding were included in the prospective study. Follow-up exams were repeated 3 mo and 12 mo after the treatment. INTERVENTION: All patients underwent photoselective 80-Watt KTP laser vaporisation of the prostate performed by two experienced surgeons. MEASUREMENTS: Disease-specific quality of life and sexual function were assessed using the International Prostate Symptom Score (IPSS) and International Inventory of Erectile Function (IIEF). Video-urodynamics were carried out to determine changes in pressure flow and bladder function. RESULTS AND LIMITATIONS: The average preoperative prostate volume was 47.63ml (range 30-75m). The mean preoperative PSA-value, which had been 3.5ng/ml (range 0.13-7ng/ml) initially, dropped by 34.2% after 3 mo and 37.1% after 12 mo. Despite transient micturition complaints (40%), all patients showed significant improvement in the IPSS in urinary peak flow and detrusor pressure at peak flow. The mean post-void residual urine volume decreased, while erectile function and libido scores remained unaffected by the procedure according to the IIEF. Detrusor contractility was also not affected in any of the patients. The single-centre study design and small number of patients may have limited the study results. CONCLUSIONS: KTP laser therapy of the prostate achieves significant improvements both symptomatically as well as with respect to objective micturition parameters. The procedure leads to a functional deobstruction of the lower urinary tract with steady improvement results throughout the follow up period.     

良性前列腺增生患者术前压力-流率测定的局限性

目的评估良性前列腺增生(BPH)患者术前行压力一流率测定的应用价值。方法BPH患者69例,根据尿动力学检查直线被动尿道阻力关系(PURR)图结果分为膀胱出口梗阻(BOO)组50例,无或可疑BOO组19例,术前行剩余尿、尿流率、膀胱有效容量和压力-流率测定,国际前列腺症状评分(IPSS)、生活质量评分(QOL)。术后3个月复查比较尿动力学指标变化。结果无或可疑BOO组和有BOO组平均Qmax分别为12.8 ml/s和7.6 ml/s,差异有统计学意义(P<0.01),2组年龄、膀胱最大容量、剩余尿、膀胱有效容量、IPSS和QOL等参数差异无统计学意义(P>0.05)。术后2组平均Qmax分别提高了7.2 ml/s和10.8 ml/s,BOO组Qmax提高幅度与无或可疑BOO组比较差异有统计学意义(P<0.05);2组IPSS和QOL与术前比较差异有统计学意义(P<0.05),IPSS和QOL的改善幅度2组间差异无统计学意义(P>0.05)。BOO组术前逼尿肌活动过度21例(42%),无或可疑BOO例组逼尿肌活动过度7例(37%)。BOO组和无或可疑BOO组术后3个月IPSS和QOL等参数改善不明显分别有15例(30%)和6例(32%)。结论压力-流率测定有无BOO,对大部分BPH患者仍有预测疗效的作用;但术前膀胱有效容量大小以及逼尿肌活动过度等因素影响了手术疗效。部分伴严重下尿路症状(LUTS)的BPH患者无BOO,手术疗效满意。术前BPH患者压力-流率测定应有选择应用,结果分析个体化。     

良性前列腺增生患者B超检查发现膀胱小梁形成的临床意义

目的 探讨良性前列腺增生(BPH)患者B超检查发现膀胱小梁形成在判断膀胱出口梗阻程度及膀胱功能状态中的作用.方法 前瞻性比较BPH经腹B超检查显示有膀胱小梁形成与无膀胱小梁形成2组患者临床资料及尿动力学检查参数.结果 有膀胱小梁形成BPH患者36例,无膀胱小梁形成患者68例,年龄分别为(73.7±10.1)岁和(69.6±6.2)岁,国际前列腺症状评分分别为(24.4±6.6)分和(22.8±8.3)分,2组比较差异无统计学意义(P＞0.05);2组最大尿流率时逼尿肌压力分别为(131.7±57.3)cm H2O(1 cm H2O=0.098 kPa)和(92.1±47.8)cm H2O,线性被动尿道阻力关系梗阻程度分级分别为4.6±1.1和3.5±1.5,2组比较差异有统计学意义(P＜0.05);72.2%(26/36)的小梁形成患者膀胱顺应性减低,其中23.1%(6/26)出现双肾积水,造成肾功能损害;无小梁形成组分别为42.6%(29/68)和10.3%(3/29),2组比较差异具有统计学意义(P＜0.05).结论 BPH患者B超检查发现膀胱小梁形成,提示存在膀胱出口梗阻,上尿路积水风险增大;无尿潴留者,膀胱小梁形成提示膀胱功能尚处于代偿期,应及时解除梗阻,有利于膀胱功能恢复,减少并发症的发生.

Abstract：

Objective To study the role of B-mode ultrasound found bladder trabeculation in evaluating the degree of bladder outlet obstruction (BOO) and the bladder function in benign prostatic hyperplasia (BPH) patients.Methods Conducted prospective research to determine differences in clinical data and urodynamic parameters between BPH patients with and without bladder trabeculation diagnosed by abdominal ultrasound.Results Thirty-six BPH patients with bladder trabeculation were compared with 68 BPH patients without bladder trabeculation.The mean age was (73.7 ± 10.1 ) years for the patients with bladder trabeculation and ( 69.6 ± 6.2 ) years without bladder trabeculation, IPSS was 24.4 ± 6.6 and 22.8 ± 8.3 respectively, in which no significant differences were found ( P ＞ 0.05 ).The detrusor pressure at maximum flow rate was ( 131.7 ± 57.3 ) cm H20 and (92.1 ± 47.8 )cm H2O ) respectively.The linearized passive urethral resistance relation was 4.6 :± 1.1 and 3.5 ± 1.5 respectively, showing a significant difference ( P ＜.05 ) between the two groups.Seventy-two point two percent (26/36) of the patients with bladder trabeculation had a low compliance bladder, among whom 23.1% (6/26) of the patients had bilateral hydronephrosis with renal insufficiency.The percentage for the control group was 42.6% (29/68) and 10.3% (3/29) respectively (P ＜ 0.05).Conclusions The bladder trabeculation found by B-ultrasound in BPH patients suggests the existence of BOO and a high risk of bilateral hydronephrosis.Bladder trabeculation in patients without urinary retention suggests they are in compensation status.Relief of the obstruction is helpful to recovery of bladder function and the reduction of complications.     

良性前列腺增生患者膀胱出口梗阻和逼尿肌功能的分析

目的：探讨尿动力学检查对BPH患者膀胱出口梗阻（BOO）和逼尿肌功能的诊断意义.方法：对95例BPH患者进行压力-容积和压力-流率测定.结果：95例BPH患者中BOO 57例,无BOO23例,其余15例为可疑或分析困难.BOO组前列腺体积大于无BOO组（62.4±16.1）cm^3 vs（41.0±7.1）cm^3（P＜0.05）,最大尿流率（Qmax）小于无BOO组（5.4±1.9）ml/s vs（12.4±5.0）ml/s（P＜0.05）,两组IPSS评分无差别（23.7±4.4）分vs（25.2±4.9）分（P＞0.05）.BOO组有逼尿肌不稳定收缩（DD34例,无BOO组D119例.结论：尿动力学检查有助于判断有无BOO存在,了解BPH患者的逼尿肌功能.IPSS不能判断患者的下尿路症状（LUTS）是否因BOO导致.BPH患者前列腺体积不足很大,但LUTS明显时,应行尿动力学检查.自由尿流率测定对BOO诊断有一定帮助.DI是无BOO患者发生LUTS的重要因素.     

逼尿肌收缩压测定在BPH患者术后疗效评估中的意义

目的 探讨逼尿肌收缩压测定在BPH患者术后疗效评估中的应用价值.方法 BPH患者109例.年龄62～83岁,平均71岁.均行尿动力学检查,明确诊断BOO,排除神经、内分泌以及其他系统疾病因素.根据逼尿肌收缩情况分为2组:Ⅰ组为逼尿肌亢进型61例,逼尿肌收缩压≥40 cm H2O(1 cm H2O=0.098 kPa),单纯行TURP或开放手术;Ⅱ组为逼尿肌无力型48例,逼尿肌收缩压≤20 cm H2O,同期行TURP和膀胱造瘘术,术后持续开放造瘘管至少2周.统计学比较2组患者术后1、3个月逼尿肌收缩压、Qmax和残余尿等参数.结果 2组患者术前最大逼尿肌收缩压分别为(78.4±37.0)、(19.2±5.4)cm H2O,Qmax分别为(7.6±2.2)、(2.5±1.1)ml/s,组间差异均有统计学意义(P＜0.05);术后1个月Qmax分别为(17.4±2.9)、(12.5±2.0)ml/s,组间差异有统计学意义(P＜0.05);术后3个月Qmax分别为(18.3±2.8)、(15.2±1.8)ml/s,组间差异无统计学意义(P＞0.05).结论 BPH患者BOO解除后,收缩乏力状况可以逐渐恢复,Qmax能获得改善,对合并逼尿肌收缩无力患者积极手术解除梗阻,可促进逼尿肌功能恢复.

Abstract：

Objective To study the value of the preoperative detrusor contractility to the outcome assessment of prostatectomy for benign prostatic hyperplasia (BPH).Methods A total of 109 patients with BPH were analyzed.Their ages ranged from 62 to 83 years with a mean of 71 years.All patients underwent urodynamic study to confirm a diagnosis of BOO preoperatively.Further more, their BOO was not caused by nervous, endocrine or other diseases.Pateints were divided into two groups based on maximum detrusor contractility.Group Ⅰ (n =61, BPH with maximum detrusor contractility ≥ 40 cm H2O, 1cm H2O =0.098 kPa) underwent TURP or open surgery, respectively.Group Ⅱ (n =48, BPH with maximum detrusor contractility ≤ 20 cm H2O ) underwent TURP and suprapubic punctural cystostomy simultaneously,the bladder fistula was kept open continuously for at least two weeks postoperatively.The difference in outcome between the two grous was assessed by using urodynamic parameters including maximum detrusor contractility, Qmax and residual urine at one and three months postoperatively respectively.Student's t-test was used to compare the result for normally distributed data and Wilcoxon's signed-ranks test for skewed data in this study.Results There was significant difference in preoperative maximum contractility, Qmax between group Ⅰand groupⅡ (78.4 ±37.0 cm H2O) vs (19.2 ±5.4 cm H2O)(P＜0.01), (7.6±2.2 ml/s) vs (2.5 ± 1.1 ) ml/s (P ＜ 0.05) respectively.Although there was significant difference at one month postoperatively in Qmax (17.4 ±2.9)ml/s vs (12.5 ±2.0)ml/s (P＜0.05), no significant difference was found in Qmax between the two groups after three months ( 18.3 ±2.8 ml/s) vs ( 15.2 ± 1.8)ml/s (P ＞ 0.05).Conclusions The Qmax may improve and the impaired detrusor recovered gradually after the BOO was removed.Performing an operation on patients with BOO accompanied with detrusor underactivity may be useful to recover detrusor contractility.     

排尿期尿道测压在BPH中的应用价值

目的探讨前列腺增生症（ＢＰＨ）致膀胱流出道梗阻（ＢＯＯ），及其相关问题。方法采用排尿期尿道测压（ＭＵＰＰ）检测４３例ＢＰＨ患者，以压力下降梯度（ＭＵＰＰＧ）计算梗阻程度，同时行膀胱等容收缩试验测最大逼尿肌等容收缩压（Ｐｉｓｏ）；进行国际前列腺症状评分（ＩＰＳＳ），经腹壁Ｂ超测前列腺体积（Ｖ）。结果４３例ＢＰＨ中３８例存在ＢＯＯ（８８％），梗阻位于膀胱颈部２８例（７７％）；ＭＵＰＰＧ与ＩＰＳＳ、Ｖ、Ｐｉｓｏ呈正相关。结论ＭＵＰＰ能检测并计算ＢＯＯ程度；ＢＯＯ是ＢＰＨ的病理基础，临床症状、逼尿肌代偿与其相关。     

B超测定BPH体积参数评价膀胱出口梗阻的意义

目的 :探讨经直肠超声 (TRUS)测定良性前列腺增生 (BPH)各项体积参数对诊断膀胱出口梗阻 (BOO)的意义。　方法 :BPH病人 116例 ,年龄 5 9～ 75 (6 8.6± 5 .1)岁。应用TRUS测定前列腺各径数值 ,应用公式V =0 .5 2R1R2 R3 计算出前列腺体积各项参数 ,同时行尿动力学检查 ,并计算AG值。将前列腺体积 (PV)、移行带体积 (TZV)、移行带指数(TZI)与病人年龄、国际前列腺症状评分 (IPSS)、前列腺特异性抗原 (PSA)及AG值进行相关性分析。　结果 :PV、TZV及TZI分别为 (6 9.7± 4 5 .9)ml、(43.5± 2 5 .6 )ml和 0 .5 7± 0 .14。最大尿流率 (Qmax)、最大尿流率时逼尿肌压力 (Pdet.Qmax)及AG值分别为 (8.31± 5 .12 )ml/s、(82 .34± 33.4 7)cmH2 O和 6 6 .72± 30 .4 6。IPSS为 2 5 .3± 4 .7,PSA为 (4.12±3.6 4 )ng/ml。相关分析提示TZI(r=0 .74 2 ,P =0 .0 17)、TZV(r =0 .6 74 ,P =0 .0 31)与AG值有显著的相关性。IPSS与TZI、TZV呈正相关 ,PSA浓度与PV、TZV、TZI呈正相关。　结论 :通过TRUS测定BPH的各项体积参数和尿动力学检查一样 ,能够作为判断BOO的参考指标     

良性前列腺增生患者膀胱内前列腺突人程度的超声测定

目的 探讨良性前列腺增生(BPH)患者膀胱内前列腺突入程度(IPP)测定对膀胱出口梗阻及膀胱功能的预测与评价. 方法 BPH患者206例,年龄55～84岁,均为首次就诊,有不同程度的尿频、尿急等下尿路症状.行经腹B超测定IPP并根据程度分2组:研究组78例(IPP>10mm)和对照组128例(IPP≤10 mm),分析2组患者临床资料及尿动力学检查结果 间的关系. 结果 研究组和对照组前列腺体积[(73.7±35.9)、(62.8±36.5)ml]、前列腺特异性抗原[(1.81±0.67)、(1.64±0.36)ng/ml]、残余尿量[(290.2±217.2)、(228.2±167.9)ml]、急性尿潴留发生率(33.3%、18.0%)及膀胱小梁化发生率(23.1%、11.7%)比较差异均有统计学意义(P<0.05).IPP与前列腺体积、残余尿量呈正相关(r分别为0.401,0.342).2组患者排尿期最大尿流率[(7.6±4.1)、(9.1±3.6)ml/s]、膀胱过度活动症发生率(82.1%,17.2%)、膀胱顺应性降低率(35.9%,12.5%)、最大逼尿肌压力[(109.8±84.9)、(84.9±44.1)cm H2O,1 cm H2O=0.098 kPa]及膀胱出口梗阻指数(75.2±27.1、65.9±34.6)比较差异均有统计学意义(P<0.05); IPP与最大尿流率呈负相关(r=-0.284),与最大逼尿肌压力及膀胱出口梗阻指数呈正相关(r分别为0.252,0.456).经保守治疗后,2组患者急性尿潴留复发率分别为64.3%(9/14)和23.5%(4/17)(P<0.05). 结论 IPP可以作为初步预测及评价膀胱出口梗阻程度和膀胱功能的指标之一;前列腺突入膀胱的BPH患者膀胱出口梗阻及膀胱功能受损程度明显高于无突入患者,对于前列腺突入膀胱的BPH患者.尤其是合并急性尿潴留患者应及早采取外科手术治疗.     

钬激光前列腺剜除术治疗良性前列腺增生合并膀胱过度活动症的临床观察

目的 探讨钬激光前列腺剜除术治疗良性前列腺增生(BPH)合并膀胱过度活动症(OAB)的临床效果.方法 2007年5月至2010年5月,应用钬激光前列腺剜除术治疗BPH合并OAB患者37例,年龄52～89岁,平均(76±3)岁.术后3～6个月之内复查尿流率和残余尿量,术后平均随访4.9个月,通过国际前列腺症状评分(IPSS评分)、生活质量(QOL)评分、最大尿流率(Qmax)、残余尿量、影像尿动力学评价疗效.结果 本组患者术前平均IPSS评分29.6±5.2,术后下降到4.6±1.2.术前平均QOL评分4.3±0.9,术后下降到1.2±1.0.术前平均Qmax为(6±3)ml/s,术后升高到(21±5)ml/s.术前残余尿量平均(167±11)ml,术后下降到(41±18)ml.随访期间86.5%的患者OAB症状及生活质量改善,但仍有13.5%的患者术后OAB症状持续存在.结论 合并OAB的BPH患者存在明确膀胱出口梗阻时,可以首先解除膀胱出口梗阻,但术后仍有部分患者残留有OAB症状.     

Assessment of voiding outcome, sexual function and quality of life two years following KTP/YAG hybrid laser prostatectomy

OBJECTIVE: To assess the long-term outcome of patients undergoing KTP/YAG hybrid laser treatment for bladder outlet obstruction due to benign prostatic enlargement, in terms of symptomatic relief, complications, sexual function, patient satisfaction and acceptance of procedure. PATIENTS AND METHODS: The study recruited 148 patients prospectively. The hybrid laser treatment involved performing an initial bladder neck incision using KTP laser at 34 W followed by 4/6 point coagulation using NdYAG laser at 60 W. Patients were followed up till 2 years and assessed using uroflowmetry, International Prostate Symptom Score (IPSS), Patient Satisfaction Score (PSS), BPH impact index (BII) and the Danish Prostate Symptom Score (DAN-PSS) sexual function questionnaire. RESULTS: 137 patients were followed up for 2 years. There was a significant improvement in the maximum flow rate, IPSS and Quality of Life Scale (QLS). The mean BII (2.9) and the mean PSS (1.9) were low suggesting overall satisfaction with the procedure. The complications included urethral stricture (0.73%), bladder neck obstruction (2.15%) and retreatment (3.6%). 79.4% had a significant decrease in the ejaculate and 32.8% had a significant change in the strength of erections. On comparing the two groups (sexual function affected vs. not affected), the age, BII, IPSS and PSS were significantly higher (p < 0.05) in the group of patients that were affected. CONCLUSIONS: Following KTP/YAG hybrid laser prostatectomy the outcome for voiding is good and durable for up to 2 years. The patient satisfaction level following the procedure is high and the procedure well accepted. However, significant interference with sexual function occurs, which appears to be occurring in tandem with a poor voiding outcome.     

膀胱出口梗阻指数在评估良性前列腺增生症膀胱出口梗阻中的应用

目的 探讨膀胱出口梗阻指数(BOON)在评估前列腺增生患者膀胱出口梗阻(BOO)中的意义.方法 对临床有下尿路症状,怀疑存在因前列腺增生症(BPH)导致膀胱出口梗阻的76例患者,测定前列腺体积(经直肠),最大自由尿流率(Qmax)和平均排尿量,通过公式计算BOON=前列腺体积(cm3)-3×Qmax(ml/s)-0.2×平均排尿量(ml).同时对患者进行压力.流率测定,计算AG值和Schafer梗阻级别,与BOON对照,分析利用BOON评估膀胱出口梗阻的准确性.结果 将本组患者年龄、前列腺体积、最大尿流率、残余尿量及BOON值,以AG作为因变量,同AG进行多元线性回归分析.整体回归方程中R=0.542(P=0.000),其中BOON值同AG值相关性最强(P=0.000).18例BOON值>-10,此时利用BOON判断BOO的敏感性为31%,特异性为100%,取BOON>-20时,敏感性为42.4%,特异性为88.2%;取BOON>-30时,敏感性为66.1%,特异性为82.4%;而取BOON>-40时,敏感性为77.9%,其特异性为64.7%.取BOON值-30作为分界点,在不明显降低特异性的同时,能够更敏感的判断BOO,BOON数值越大,利用BOON判断膀胱出口梗阻的特异性越高.结论 通过测定前列腺体积,最大自由尿流率(Qmax)和平均排尿量计算膀胱出口梗阻指数,取BOON>-30为分界点,是预测前列腺增生症是否存在膀胱出口梗阻的一种简易、无创方法,具有较好的特异性和敏感性.     

网状支架治疗前列腺增生症121例的远期疗效

目的 评价应用记忆合金网状支架治疗前列腺增生症(BPH)合并膀胱出口梗阻(BOO)的远期临床疗效。方法 1995.3～1999.5月应用国产镍钛合金网状支架治疗前列腺增生症患者121例,术后1年分别进行随访;重新评定疗效。结果 术后1、2、4年有效率分别为91.5％、80.9％、64.3％,IPSS由术前25.4减少至8.5,MFR从术前2.5ml/s增加至13.4ml/s,RUV由术前119.3ml减少至52.8ml。结论 前列腺尿道测量的准确性及支架安放的准确性影响手术的远期疗效。网状支架仍然适用于前列腺增生症的高危患者。     

良性前列腺增生患者尿动力学及逼尿肌超微结构的相关性研究

目的 探讨良性前列腺增生(BPH)患者尿动力学检查与膀胱逼尿肌超微结构的关系.方法 BPH组患者43例,平均年龄(69.5±6.0)岁;无膀胱出口梗阻的其他疾病患者21例为对照组,平均年龄(65.4±7.2)岁.2组患者均行尿动力学检查,透射电镜观察膀胱逼尿肌超微结构.比较2组患者尿动力学检查及逼尿肌超微结构情况.结果 BPH组和对照组患者国际前列腺症状评分分别为(21.1±3.0)和(7.6土1.4)分,P<0.01;最大尿流率分别为(7.7±1.3)和(14.9±2.3)ml/s,P<0.01;最大尿流率时逼尿肌收缩压分别为(60.1±11.o)和(48.7±7.1)cm H2o(1 cm HzO=0.098 kPa),P<0.05;梗阻系数分别为44.8±9.9和19.0±5.9,P<0.01;膀胱逼尿肌细胞线粒体相对密度分别为0.81±0.24和1.03±0.11,P<0.05;膀胱逼尿肌细胞间隙分别为(19.4±4.8)和(14.1±2.0)nm,P<0.05.结论 BPH患者逼尿肌细胞线粒体水肿、相对密度减低,是导致逼尿肌收缩力减弱的原因之一;同时由于细胞间隙增宽,导致逼尿肌收缩速度减慢或不协调,引起膀胱协调收缩力下降.     

Interrelationships of bladder compliance with age, detrusor instability, and obstruction in elderly men with lower urinary tract symptoms

Data on the interrelationships of bladder compliance (BC), detrusor instability (DI), and bladder outflow obstruction (BOO) in elderly men with lower urinary tract symptoms (LUTS) are scarce and were therefore assessed in this study. Principle inclusion criteria for this study were men aged > or = 50 years suffering from LUTS as defined by an International Prostate Symptoms Score (IPSS) of > or = 7 and a peak flow rate (Qmax) of < or = 15 ml/sec. Patients with previous surgery of the bladder, prostate, or urethra as well as a pathological neurourological status were excluded from this study. The following parameters were studied in all patients: IPSS, prostate volume calculated by transrectal ultrasonography, free uroflow study, post-void residual volume determined by transurethral catheterization, and a multichannel pressure flow study (pQS). A group of 170 men were included in the analysis. The mean BC in the overall group was 32 +/- 2 ml/cm H2O (mean +/- standard error of the mean [SEM]; range, 4-100 ml/cm H2O). In 36.5% of patients, BC was significantly reduced (< or = 20 ml/cm H2O), and in a further 37.1%, it ranged from 20 to 40 ml/cm H2O. BC decreased statistically significantly (p < 0.05) in patients with advanced age, lower Qmax, higher voiding pressures, and larger prostates. In men with DI (n = 61), mean BC was significantly lower (22 +/- 3 ml/cm H2O) compared to those without (37 +/- 3 ml/cm H2O; p = 0.001; n = 109). Patients with severe BOO as defined by a linear passive urethral resistance relationship of > or = 3 (n = 109), had a significantly lower BC (23 +/- 2 ml/cm H2O) compared to those without or minimal obstruction only (39 +/- 3 ml/cm H2O; p = 0.0002; n = 61). Stepwise logistic regression analysis revealed that DI, a low bladder capacity, and a high maximum detrusor pressure were independent predictors of markedly reduced BC (< 20 ml/cm H2O). BC is decreased in elderly men with high voiding pressures, BOO, and DI. The mechanism leading to the reduction of BC under these circumstances is largely unknown and could result from cytostructural alterations of the detrusor and changes in detrusor innervation.     

Clinical relevance of transurethral resection of the prostate in "asymptomatic" patients with an elevated prostate-specific antigen level

OBJECTIVES: To determine the clinical relevance of transurethral resection of the prostate (TURP) in patients with minor lower urinary tract symptoms (LUTS) but elevated prostate-specific antigen (PSA) levels. METHODS: We retrospectively included 82 patients, aged 50.2-78.2 yr, with minor LUTS, elevated PSA (> or =4 ng/ml), and no signs of prostate cancer (PCa) after (multiple) negative multisite biopsies who underwent TURP after they were diagnosed by urodynamics with bladder outlet obstruction (BOO). We evaluated the clinical benefit of TURP by assessing its effect on International Prostate Symptom Score (IPSS) and PSA and the diagnostic value of histologic examination of the resected tissue for the presence of PCa. RESULTS: After TURP, histologic analysis of the resected specimen revealed that eight patients (9.8%) had PCa; seven of these patients had a tumour that needed further treatment. The remaining 74 patients (90.2%) were diagnosed with BOO due to benign prostatic hyperplasia/benign prostatic enlargement (BPH/BPE). In this group, the mean PSA level decreased from 8.8 ng/ml before TURP to 1.1 ng/ml in the first year and 1.3 ng/ml in the second year after TURP; the mean IPSS decreased from 8.8 to 1.5 in the first year after TURP. CONCLUSIONS: The current data suggest that patients with minor LUTS and elevated PSA without evidence of PCa are very likely to have BOO due to BPH/BPE and may benefit from TURP if obstruction is proved. However, a prospective trial is warranted to assess the impact of these results on clinical practice.     

前列腺增生致膀胱出口梗阻后逼尿肌功能改变对尿动力学参数的影响

目的探讨良性前列腺增生症（BPH）致膀胱出口梗阻（BOO）后逼尿肌功能改变对尿动力学参数的影响。方法109例具有完整尿动力学结果的BPH患者根据有无B00分为梗阻组和非梗阻组;梗阻组根据梗阻级别分Ⅲ、Ⅳ、Ⅴ、Ⅵ级4组;逼尿肌收缩力分为逼尿肌收缩力减弱（DCA）与收缩力正常组;逼尿肌不稳定（DI）分DI与非DI;膀胱顺应性（BC）分高、正常、低顺应性三组;28例患者行经尿道前列腺切除术（TURP）术前及术后尿动力参数对比。结果BOO组的前列腺体积（PV）、国际前列腺症状评分（IPSS）、DI、急性尿潴留（AUR）发生率明显高于非BOO组（P〈O．05）;BOO组的最大尿流率（Qmax）、BC值、DCA发生率明显低于非BOO组（P〈0．05）;逼尿肌收缩力正常组的残余尿（RV）与BC值明显低于减弱组（P〈0．05）,而BOO和DI的发生率明显高于减弱组（P〈0．01）;DI组的年龄、BC值及DCA的发生率明显低于非DI组（P〈0．05）,而B00级别和AUR的发生率明显高于非DI组（P〈0．01）;低BC组IPSS、BOO级别、AUR发生率明显高于正常及高BC组（P〈0．05）,而DCA发生率明显低于正常及高BC组（P〈0．01）;术后Qmax、BC值较术前明显升高（P〈0．05）,RV、IPSS、DI发生率较术前明显减小（P〈0．01）。结论①BOO常与低顺应性膀胱、DI、AUR合并存在;②IPSS评分不能提示是否存在DI,DI的存在不影响IPSS评分;③TURP是治疗前列腺增生的金标准;④尿动力检查能全面了解有无BOO及BOO所致逼尿肌功能改变情况,对BPH的临床鉴别诊断、预后估计及选择恰当治疗方案都具有重要意义。     

Examination of the mechanism of ameliorating effect of alpha 1-blocker on storage symptoms associated with benign prostatic hyperplasia

To investigate the mechanism of the ameliorating effect of alpha1-blocker on storage symptoms associated with benign prostatic hyperplasia (BPH), we evaluated the effect of tamsulosin on the bladder blood flow in rats with bladder outlet obstruction (BOO). BOO was produced by ligature in the part around a proximal urethra and kept for 2 weeks. Tamsulosin was subcutaneously administered with an osmotic pump for 2 weeks immediately after the BOO operation. Bladder blood flow in the sham-operated rats, the control BOO rats and the tamsulosin-treated BOO rats was measured by the fluoro-microsphere method. Bladder blood flow was significantly reduced in BOO rats compared with sham-operated rats, and tamsulosin significantly increased the bladder blood flow in BOO rats. The present results suggest that the increase in bladder blood flow by tamsulosin contributes to the improvement of storage symptoms associated with BPH.     

Urodynamic parameters for the diagnosis of bladder outlet obstruction in women

INTRODUCTION: Bladder outlet obstruction (BOO) is often overlooked in the diagnosis of women with lower urinary tract symptoms. Although the incidence of BOO is not high in the female population with lower urinary tract symptoms, a correct diagnosis for BOO is important. This study was designed to compare the urodynamic parameters in women with bladder outlet obstruction (BOO), stress urinary incontinence (SUI) and asymptomatic volunteers. MATERIALS AND METHODS: Videourodynamic study was performed in 76 patients who were clinically diagnosed as BOO, 265 with stress urinary incontinence (SUI). In addition, 30 asymptomatic female volunteers were recruited and served as controls. Voiding pressure (P(det.Qmax)), maximum flow rate (Qmax), and urodynamic parameters were compared among the BOO, SUI and control groups and the criteria values for BOO in women were estimated. RESULTS: BOO was identified in 30 women with bladder outlet stricture, 40 women with dysfunctional voiding, and 6 women with high-grade cystocele. The mean P(det.Qmax) was significantly higher and the mean Qmax was significantly lower in the obstructed groups. When a P(det.Qmax) > or =35 cm H(2)O was set as the criteria for BOO, the sensitivity was 96.1% and specificity was 89.0%, whereas a P(det.Qmax) of > or =30 cm H(2)O had a sensitivity of 100% but the specificity was only 65.5%. If the criteria of BOO was set as P(det.Qmax) > or =35 cm H(2)O combined with Qmax < or =15 ml/s, the sensitivity for BOO was 81.6% and specificity was 93.9%. CONCLUSIONS: Our results demonstrate a P(det.Qmax) of > or =30 cm H(2)O is a good index value for screening of female BOO. When a P(det.Qmax) of > or =35 cm H(2)O combined with a Qmax < or =15 ml/s was found, a high suspicion of BOO should be raised, for which a specificity of 93.9% and sensitivity of 81.6% for BOO was obtained.     

Transurethral holmium laser resection of the prostate – progress in the treatment of BPH?

Summary After the initial enthusiasm subsided lasercoagulation of the prostate has been criticized because the extent of tissue destruction cannot be controlled and many patients may be expected to have significant postoperative obstructive as well as irritative voiding symptoms which may last for weeks. Thanks to new laservaporization techniques these disadvantages have been largely eliminated. With the Holmium laser a real resection of prostatic tissue is possible allowing the surgeon to see the prostatectomy defect immediately and to assess tissue destruction during the operation (“what you see is what you get”). The postoperative voiding disturbances are diminished and comparable to those after TUR-P. At the Departement of Urology of the University of Berne 116 patients were treated with the Holmium laser for benign prostatic hyperplasia (BPH). During the initial learning period 12 patients required a secondary TUR-P due to persistent obstruction and in 12 patients a combined laser/conventional resection was performed due to underestimated prostate size. 5 patients were lost to follow-up. In the remaining 87 patients the median duration of catheterization was 2 days. 10/87 patients required postoperative treatment for urinary tract infection. There were no significant perioperative decreases in hemoglobin and no cases of TUR syndrome. 66 patients have been followed for 6 months and 30 patients have been followed for 12 months. The maximum urinary flow improved from 7 ml/s preoperatively to 15 ml/s at 6 months and 14 ml/s at 12 months. The volume of residual urine decreased from a median of 120 ml preoperatively to 24 ml at 6 and 12 months. The IPSS decreased from a median of 20 preoperatively to 3 at 6 and 12 months. In 50 patients followed with pressure-flow study pre- and 6 months postoperatively detrusor pressure at maximum flow decreased from 90 cm H₂O to 55 cm H₂O and linear PURR sank from 2,06 to 0,6. Taking into account the initial learning curve, transurethral Holmium laser resection of the prostate is a promising method of treatment for BPH as shown by the increase in urinary flow and decrease in detrusor pressure. Although it does not yet rank equally with TUR-P, it is a less invasive alternative providing efficient, safe and almost bloodless treatment of BPH.