女性下尿路症状的尿动力学分析(附283报告)

目的 研究以下尿路症状为主诉的女性患者的尿动力学变化及其临床意义。方法女性患者．年龄6-89岁，临床表现为储尿期（刺激性）和（或）排尿期（梗阻性）症状，采用尿动力学方法检查尿流率、同步膀胱压力容积流率及肛门括约肌肌电图测定、部分同步透视下行影像尿动力学检查。结果 以排尿症状为主者86例，以储尿症状为主者197例。不稳定膀胱57例，感觉性尿急30例。神经原性膀胱尿道功能障碍32例，其中逼尿肌反射低下26例。逼尿肌反射亢进7例。逼尿肌收缩力低下26例。逼尿肌外括约肌协同失调1例。下尿路梗阻30例，其中膀胱颈梗阻6例，尿道远端狭窄11例，非神经原件逼尿肌外括约肌协同失调13例。压力性尿失禁68例，其中Ⅰ型19例，Ⅱ型12例。Ⅲ型14例，Ⅱ／Ⅲ型23例；TF常40例。结论 尿动力学检查能了解膀胱的功能状况和膀胱出口梗阻的部位，为临床治疗的选择提供了可靠的依据。     

Analysis of the pathophysiology of lower urinary tract symptoms in patients after prostatectomy

OBJECTIVES: To analyze the pathophysiology of persistent lower urinary tract symptoms (LUTS) in patients after transurethral prostatectomy (TURP). METHODS: A total of 185 patients who had persistent LUTS after TURP were enrolled into this study. All of these patients underwent multichannel videourodynamic studies and were classified into 6 groups according to the urodynamic results. Preoperative prostate volume, resected adenoma weight, and preoperative Q(max) were determined in each of the groups and the symptomatology and urodynamic findings were compared. RESULTS: A normal videourodynamic tracing was found in 17 patients (9.1%), pure detrusor instability in 18 (9.6%), low detrusor contractility in 35 (18.7%), detrusor instability and inadequate detrusor contractility (DHIC) in 27 (14.4%), poor relaxation of the urethral sphincter in 36 (19.3%), and bladder outlet obstruction (BOO) in 52 (27.8%). Incontinence was noted in 74 patients (40%), and 18 of them had BOO (24.3%). In urodynamic findings, Q(max) and residual urine showed no significant difference among patients with low contractility, poor relaxation of sphincter, DHIC and BOO. Concerning the preoperative prostatic volume, patients with low contractility, poor relaxation of urethral sphincter, and DHIC had a nonsignificantly smaller prostate volume and resected prostate weight than other groups. Preoperative Q(max) showed no significant difference among all groups. CONCLUSIONS: Symptoms alone are unreliable in predicting urodynamic findings with respect to obstruction and detrusor instability after TURP. Over half of the patients with persistent LUTS had a small prostate volume and small resected adenoma weight, indicating that some of these patients may not have had BOO. Videourodynamic study is helpful in making an accurate diagnosis for refractory LUTS after TURP.     

Videourodynamic analysis in men with lower urinary tract symptoms: Correlation between age and prostate size with lower urinary tract dysfunction

ObjectivesLower urinary tract symptoms (LUTS) are highly prevalent in aging men. In this study we examined the relationship between age, total prostate volume (TPV), and videourodynamic study findings.MethodsWe retrospectively analyzed a total of 971 men ≥ 40 years of age referred to us for investigation of LUTS. We analyzed the distribution of the different videourodynamic study diagnoses in male LUTS by correlating their age and prostate size.ResultsThe most common diagnosis in the bladder outlet obstruction (BOO) group differed significantly by age and poor relaxation of the external sphincter (PRES) in those aged < 50 years; bladder neck dysfunction in those aged 50–69 years, and benign prostatic obstruction in those ≥ 60 years. Detrusor overactivity was the most common diagnosis in all ages in the bladder dysfunction group, and the cases of hyperactivity with impaired contractility (DHIC) increased with age. In patients < 50 years of age, PRES was the most common diagnosis in the BOO group in both those with small prostates (total prostate volume ≤ 40 mL) and large prostates (total prostate volume > 40 mL). In patients aged 50–69 years, the most common diagnosis in those with BOO and a small prostate was bladder neck dysfunction, and that in those with BOO and a large prostate was benign prostatic obstruction. Similar results were observed in patients aged ≥ 70 years. In all age groups, the majority of patients with detrusor overactivity, hypersensitive bladder, detrusor underactivity, and DHIC had a small prostate.ConclusionIn male LUTS, the diagnoses in the BOO group differed by age and prostate volume. In young patients with BOO, the leading diagnosis was PRES, and the contribution of prostate volume to BOO increased with age. As age increased, the bladder function became more complex with an increased percentage of patients with DHIC. Both bladder outlet and bladder functions were affected by age.     

Detrusor contractility and overactive bladder in patients with cerebrovascular accident

Objectives:   A retrospective analysis of urodynamic studies was conducted to investigate detrusor contractility following cerebrovascular accident.
Methods:   Fifty-seven patients (34 men and 23 women) who were rehabilitated following cerebrovascular accident were included in the analysis. Subjects with maximum contractile power values less than 10 W/m² in men and 8 W/m² in women, in the absence of bladder outlet obstruction, were defined as having detrusor underactivity.
Results:   A significantly lower maximum value of detrusor contractile power and a larger residual urine volume, particularly more prevalent in women than in men, appeared unexpectedly after cerebrovascular accident. Patients with underactivity had significantly lower maximum and average flow rates, lower contractile power, and an increased postvoid residual relative to their normal counterparts. The prevalence of underactivity was 35% in the men and 43% in the women. Furthermore, 67% of the men and 80% of the women with underactivity had overactive bladder symptoms. On the other hand, detrusor underactivity was observed in 8 (35%) of 23 overactive bladder patients in the men and 8 (42%) of 19 in the women.
Conclusions:   Post-cerebrovascular accident patients presented various patterns of detrusor contractility. Specific attention to the possible occurrence of detrusor underactivity in these patients is essential for the successful management of overactive bladder syndrome.     

尿动力学检查在下尿路症状患者诊断中的价值（附324例报告）

目的：评价尿动力学在下尿路症状（LUTS）患者病因诊断中的重要价值。方法：对324例不同年龄的LUTS患者行尿流率、压力容积、压力-流率、前列腺压和肌电图检查,根据检查结果,行相应的临床治疗措施,比较治疗前后IPSS、QOL的变化。结果：根据尿动力学结果提示LUTS病因有5种,膀胱出口梗阻55．9％、逼尿肌受损、逼尿肌-括约肌失协调、不稳定膀胱、膀胱容量减少。制定相应治疗方案,取得良好临床效果。结论：尿动力学检查揭示LUTS的深层次病因,在LUTS患者的诊断、鉴别诊断及治疗方式的选择上具有重要的意义,值得临床推广应用。     

女性膀胱流出道梗阻的影像尿动力学检查特点分析

目的 探讨女性膀胱出口梗阻(BOO)患者影像尿动力学检查特点及意义.方法 女性BOO患者42例,根据梗阻部位分为膀胱颈梗阻(7例)、中段尿道梗阻(13例)、远端尿道梗阻(15例)、尿道外口梗阻(3例)、盆腔器官重度脱垂(4例)5组.患者术前均行影像尿动力学检查,比较5组病例Qmax、最大膀胱容量、Pdet atQmax、残余尿、逼尿肌无抑制收缩、双侧肾积水等指标.结果 42例患者中以尿频、尿急等储尿症状为主者17例(40.5%),以排尿困难等为主者4例(9.5%),混合症状者21例(50.0%).42例Qmax(10.9±5.6)ml/s、最大膀胱容量(253±140.7)ml、Pdet atQmax(53.3±25.7)cm H2O、残余尿量(76.2±70.3)ml,逼尿肌无抑制收缩者21例(50.0%);5组患者比较:最大膀胱容量差异无统计学意义;膀胱颈梗阻组Pdet atQmax最高、残余尿量最多、Qmax最低、肾积水比例最高,与其他各组比较差异有统计学意义(P<0.05);逼尿肌无抑制收缩在外括约肌部梗阻患者中10例(76.9%),与其他各组比较差异有统计学意义(P<0.05).结论 影像尿动力学检查能有效评估女性BOO下尿路功能,提示梗阻部位并指导临床治疗.女性BOO患者中膀胱颈梗阻程度是影响上尿路损害的主要因素.     

Air cystometrography and sphincter electromyography in patients with bladder outlet obstruction.

38 patients with infravesical obstruction secondary to benign prostatic hypertrophy had CO2 cystometrography (CMG) and sphincter electromyography (EMG) at onset of retension and 6 weeks after intermittent bladder drainage. Neurological diseases were excluded in these patients. Three patterns of CMG tracings were obtained and were called, normal, 'compensating' and 'decompensating' on the basis of the volume: pressure ratio of the curves. By strict definition, no abnormal detrusor contractions were seen in any of these patients who also all had normal sphincter electromyography. It is questionable therefore if infravesical obstruction, in the absence of neurological deficits can account for the uninhibited detrusor contractions described in the literature. Rather it is possible to explain the above CMG tracings on the effects of obstruction on the bladder smooth muscle and collagen fibers which have been shown to be non-neural dependent.     

逼尿肌活动低下在下尿路症状中的临床特征及诊疗策略分析

目的:探讨逼尿肌活动低下(DU)在下尿路症状(LUTS)患者中的流行病学现状、临床特征及诊疗策略。方法:回顾性分析了我院1 019例排除神经源性膀胱及解剖结构异常的LUTS患者的尿流动力学检查结果及随访资料,探讨DU在LUTS中的流行病学及临床诊治特点,并对106例DU患者治疗前后行尿流动力学检查,结合文献进行临床分析。结果:在就诊患者中,储尿期症状最为多见,在男性患者中,排尿期症状稍多于储尿期症状,而女性患者储尿期症状明显多于排尿期症状。男性患者中膀胱出口梗阻(BOO)的患者为57.9%,而女性患者中压力性尿失禁(SUI)患者达到了43.3%。27.4%男性及23.2%女性诊断为DU,男性及女性患病率差异无统计学意义。DU患者与非DU患者的临床表现无明显差异,均以LUTS为主要表现。DU可能合并有逼尿肌过度活动或BOO。DU随着年龄的增加,患病率逐渐增加。106例DU患者经治疗后行尿动力学检查发现逼尿肌收缩力有一定提高,治疗前后逼尿肌肌力差异有统计学意义。结论:DU是LUTS患者的常见病因,并有可能同时合并有逼尿肌过度活动或BOO。目前针对DU患者的治疗有一定效果。     

Analysis of female voiding dysfunction: a prospective, multi-center study

Purpose

Female voiding dysfunction lacks clear definitions or objective data even to this day due to the relatively low prevalence and complex etiologies of voiding dysfunction in women compared to men. The prevalence varies widely from 2.7 to 23 % (Nitti et al. in J Urol 161(5):1535–1540, 1999; Rees et al. in Br J Urol 47(7):853–860, 1975; Groutz et al. in Neurourol Urodyn 19(3):213–220, 2000; Farrar et al. in Br J Urol 47(7):815–822, 1975; Massey and Abrams in Br J Urol 61(1):36–39, 1988; Chassagne et al. in Urology 51(3):408–411, 1998). Diagnostic criteria and management of female voiding dysfunction have not yet been established. We performed a prospective, multi-center study at nine hospitals to investigate the characteristics and prevalence of female voiding dysfunction.

Materials and methods

A total of 1,415 women visited urology clinics in nine hospitals from September to December 2005. Among them, 792 patients presented with lower urinary tract symptoms (LUTS). We analyzed their urinary symptoms with an International Prostate Symptom Score (IPSS) and obtained objective data using uroflowmetry, residual urine volume, and urinalysis. The authors hereby define female voiding dysfunction as maximum flow rate (Q _max) of 15 ml/s or less, which may be due to either bladder outlet obstruction (BOO) or bladder dysfunction caused by detrusor underactivity. BOO was defined as Q _max <15 ml/s with detrusor pressure >20 cmH₂O at Q _max, and detrusor underactivity was defined as Q _max <15 ml/s with detrusor pressure <20 cmH₂O at Q _max on pressure flow studies.

Results

Hundred and two patients (12.8 %) from a total of 792 LUTS patients complained of voiding difficulty. Mean total IPSS score, mean IPSS subscores for voiding and storage symptom was 19.5 ± 7.9, 12.0 ± 5.0, and 8.4 ± 3.4, respectively. Among the seven categories of IPSS, incomplete emptying was the most common symptom followed by weak stream. Eighty-nine patients (87.2 %) from a total of 102 voiding dysfunction patients showed BOO, while 13 patients (12.8 %) showed detrusor underactivity. Concomitant diseases observed with voiding dysfunctions were overactive bladder (32 patients), stress urinary incontinence (25), detrusor underactivity (13), previous stress urinary incontinence surgery (12), pelvic organ prolapse (4), and anatomical obstruction (3 patients).

Conclusion

The prevalence of voiding difficulty in female urology patients who visit urologic office clinic was 7.2 and 12.8 % in female LUTS patients. Voiding symptoms were more common than storage symptoms, while functional BOO was more prevalent than detrusor underactivity in female voiding difficulty patients. We may expect alpha blockers to be an effective treatment option in female voiding difficulty due to functional BOO.     

URODYNAMIC CHARACTERIZATION OF NONOBSTRUCTIVE VOIDING DYSFUNCTION IN SYMPTOMATIC ELDERLY MEN

PURPOSE: The pathogenesis of lower urinary tract symptoms in men without bladder outlet obstruction has not been well characterized. Therefore, we defined the urodynamic abnormalities associated with symptomatic nonobstructive voiding dysfunction, and determined the relationship between age and type of dysfunction. MATERIALS AND METHODS: Video urodynamic studies of symptomatic men without outlet obstruction were examined. The criterion for a normal bladder outlet was a pressure gradient across the prostatic urethra of 5 cm. water or less in the absence of distal stricture. A maximum isometric contraction pressure less than 60 cm. water was regarded as impaired detrusor contractility. Detrusor instability was defined as involuntary detrusor contractions during filling or the inability to suppress a detrusor contraction after initiation of flow. Patients were categorized into 4 groups based on the urodynamic findings. RESULTS: Of 193 men (mean age 69.6+/-10.5 years) 40.9% had detrusor instability (group 1), 31.1% had impaired contractility (group 2), 10.8% had detrusor instability and impaired contractility (group 3), and 17.1% were urodynamically normal (group 4). Average patient age was significantly lower in group 4 than all other groups. Bladder capacity was lowest in group 1, and group 3 had the lowest voiding efficiency. Maximum flow rate, bladder compliance and symptom scores were not different among the 4 groups. The prevalence of detrusor instability with and without impaired contractility increased, while the proportion of patients without urodynamic abnormalities decreased with age. Bladder contractility did not correlate with age. CONCLUSIONS: The nonobstructed patient population comprises several groups that are functionally distinct while symptomatically similar. Thus, treatment of nonobstructed cases based on symptoms may lead to inappropriate pharmacological therapy and unsuccessful clinical outcomes.     

老年女性排尿困难的尿动力学分析

目的：研究以排尿困难为主诉的老年女性患者的尿动力学变化及其临床意义。方法：女性患者．年龄60～89岁，临床表现为排尿费力，采用尿动力学方法检查尿流率、同步膀胱压力容积流率及肛门括约肌肌电图测定，部分患者同步透视下行影像尿动力学检查。结果：神经原性膀胱尿道功能障碍占27．3％．逼尿肌收缩力低下占34．1％，膀胱颈梗阻为4．5％．尿道远端狭窄13．6％．不稳定膀胱6．8％，非神经原性逼尿肌外括约肌协同失调占4．5％，感觉性尿急2．3％，正常6．8％。结论：尿动力学检查能了解膀胱的功能状况和膀胱出口梗阻的部位．为临床治疗提供了可靠的依据。     

女性排尿困难影像尿动力学评估

目的了解以排尿困难为主诉的女性患者影像尿动力学的临床意义及下尿路梗阻的鉴别诊断。方法采用影像尿动力学检查４４例患者。结果神经原性膀胱占５０％,其中逼尿肌反射低下３９％,逼尿肌反射亢进为１１％;下尿路梗阻占３６％,其中尿道远端狭窄２７％,原发膀胱颈梗阻９％;感觉性尿急３％;正常１１％。结论影像尿动力学检查能了解患者逼尿肌的功能状况,并能准确判断下尿路梗阻的解剖水平,为临床治疗的选择提供了可靠的依据。     

Changes of urinary nerve growth factor and prostaglandins in male patients with overactive bladder symptom

AIM: Nerve growth factor (NGF) and prostaglandins (PG) in the urinary bladder can be affected by pathology of bladder, and this change can be noted in the urine. This study was performed to investigate the changes in urinary NGF and PG in male patient with overactive bladder (OAB) symptoms. METHODS: The study group included 75 male patients with OAB symptoms and 20 males without bladder symptoms as controls. Evaluation included history-taking, urinalysis, International Prostate Symptom Score (IPSS) and urodynamic study. The NGF, PGE2, PGF(2alpha) and PGI2 levels in voided urine were analyzed by enzyme linked immunosorbent assay and these results were compared in control and OAB patients. Also, the urinary levels of NGF and PG were correlated with IPSS score and urodynamic parameters in OAB patients. RESULTS: The urinary levels of NGF and PGE2 were signi fi cantly increased in patients with OAB compared with control (P < 0.05). The urodynamic study in OAB patients showed that more than half of the patients had detrusor overactivity and bladder outlet obstruction. The incidence of detrusor underactivity was noted in seven patients in the OAB group. The urinary level of PGE2 was decreased in patients with detrusor underactivity compared with patients without detrusor underactivity (P < 0.05), and negatively correlated with maximum bladder capacity in OAB patients (P < 0.05). CONCLUSIONS: NGF and PG may have important role in male patients with OAB, and the urinary level of PGE2 can change according to detrusor function. Therefore, these results may be used as urinary markers to evaluate the OAB symptoms.     

Detrusor contraction power parameters (BCI and W max) rise with increasing bladder outlet obstruction grade in men with lower urinary tract symptoms: results from a urodynamic database analysis

Purpose

To investigate to what extent detrusor work during voiding is influenced by bladder outlet obstruction (BOO) in adult men with lower urinary tract symptoms (LUTS).

Materials and methods

We reviewed data of patients with LUTS suggestive of benign prostatic hyperplasia who received computer-urodynamic investigations as part of their baseline clinical assessment. BOO was defined by the Schäfer classification and detrusor work during voiding was quantified by calculation of the bladder contractility index (BCI) and maximum Watt factor (W _max) obtained by pressure-flow analysis.

Results

A total of 786 men with medians of 64 years, IPSS 16 and prostate volume of 35 ml, were included in the study. A total of 462 patients (58.8 %) had BOO (Schäfer 2–6). Both detrusor contraction power parameters continuously increased with rising BOO grade. Median BCI increased from 73.3 in Schäfer 0 to 188.0 in Schäfer 6, whereas W _max increased from 9.6 to 23.4 W/m² (p < 0.001). Results of BCI and W _max correlated well (p < 0.001). With increasing BOO grade, there was a significant decrease of voiding efficiency (p < 0.001).

Conclusions

In adult male LUTS patients, detrusor contraction power parameters—BCI and W _max—continuously increase with rising BOO grade. According to our results, it is impossible to determine a single threshold value for detrusor contraction power to diagnose detrusor underactivity in a group of LUTS patients with different BOO grades. The study is limited to men with non-neurogenic LUTS. Future studies should evaluate exact threshold values for BCI and W _max in BOO subgroups to adequately define detrusor underactivity and investigate men with other bladder conditions.     

通尿灵对BPH患者影像尿动力学的影响

目的：评价生长因子抑制剂非洲臀果木提取物－通尿灵治疗良性前列腺增生症（BPH） 的临床疗效。方法;选择经临床确诊的BPH患者48例,口服通尿灵50mg,2次／d,共8周。分别于用药前及治疗后8周行国际前列腺症状评分（IPSS）、尿流率、剩余尿量、前列腺休影像尿动力学等指标测定,同时对出现的副作用进行记录。结果：用药8周后IPSS平均降低6.67分,尿流率平均升高4.2mg/s ,剩余尿量平均减少25.5ml,前列腺体积无明显变化,影像尿动力学指标有明显改善。结果：通尿灵对改善BPH患者主观症状、客观体征和提高生活质量有明显效果,副作用及不良反应少。评价通尿灵对BPH疗效时,影像尿力学检查能了解逼尿肌的功能状况,并能准确判断下尿路梗阻的解剖水平变化情况。     

The pathophysiology of lower urinary tract symptoms after brachytherapy for prostate cancer

OBJECTIVES: To determine the spectrum of pathophysiology underlying the lower urinary tract symptoms (LUTS) persisting for > or = 6 months after brachytherapy for localized prostate cancer. PATIENTS AND METHODS: A database of men from two practice settings was searched for men who developed LUTS persisting for > or = 6 months after completing brachytherapy for localized prostate cancer. Patients were evaluated with a structured history and physical examination, International Prostate Symptom Score (IPSS), 24-h voiding diary, noninvasive free-flow uroflowmetry, postvoid residual urine volume (PVR), cystoscopy and a video-urodynamic study. Specific data collected included symptoms, elapsed time since brachytherapy, Gleason score, IPSS, total number of voids/24 h, maximum voided volume, cystoscopic findings, and urodynamics findings (PVR, maximum urinary flow rate, Schaefer obstruction grade, Watts factor, incidence of detrusor overactivity (DO) urethral obstruction and low bladder compliance). These data were compared with those from a previous study of men with LUTS who did not have prostate cancer. RESULTS: The study included 47 men (aged 54-88 years); the median (range) interval between brachytherapy and evaluation was 1.5 (0.5-13) years. Thirty-seven men complained of overactive bladder symptoms (79%), and 31 of incontinence (71%), 21 of obstructive symptoms (44%), and persistent dysuria in 12 (26%). Comparison of urodynamic findings in men with unselected causes of LUTS vs LUTS due to brachytherapy revealed the following comparisons: DO in 252 of 541 (47%) unselected vs 28 of 33 (85%) brachytherapy, (P < 0.001); and urethral obstruction in 374 of 541 (69%) unselected vs 24 of 33 (73%) brachytherapy (P = 0.85). CONCLUSION: The pathophysiology and severity of persistent LUTS in men after brachytherapy differs from that of men with LUTS in the general population. Men after brachytherapy have a much higher incidence of DO, prostatic and urethral strictures and prostatic urethral stones.     

Urodynamic studies in the evaluation of young men presenting with lower urinary tract symptoms

AIM: To evaluate the usefulness of urodynamic study in young men with lower urinary tract symptoms (LUTS). METHODS: We reviewed the charts of 50 men with LUTS aged 50 years and below. Those with neurological diseases, urethral trauma or strictures were excluded. All underwent multichannel urodynamic studies (UDS). The pre- and post-UDS diagnoses and treatment modalities were compared. RESULTS: Mean age was 38.1 years (17-49). The main pre-UDS diagnoses included prostatitis in seven (14%), overactive bladder in seventeen (34%) and benign prostatic hyperplasia in nine (18%). Pre-UDS management ranged from anticholingeric agents for thirteen (26%), alpha-adrenergic antagonists for nine (18%), antibiotics for six (12%). Abnormal UDS were noted in 36 (72%), including detrusor overactivity in 9 (18%), detrusor underactivity/acontractility in 5 (10%) and bladder outlet obstruction in 21 (42%). Fourteen (28%) had primary bladder neck dysfunction and five (10%) had benign prostatic hyperplasia. Post-UDS management included anticholingeric agents for ten (26%), alpha-adrenergic antagonists for seventeen (34%), catheterization for four (10%), behavioral therapy for three (6%), surgery for three (6%). None were prescribed antibiotics. Following UDS, the diagnosis had to be updated in 40 (80%) and concomitant change in management was required in 34 (68%). CONCLUSION: Young men presenting with LUTS have different underlying etiologies. Clinical diagnosis and treatment are often empiric and inaccurate. Urodynamic study is useful in the evaluation of this group of patients as it aids in arriving at an accurate diagnosis and guides treatment therapy.     

Managing voiding dysfunction in young men

Voiding dysfunction is an uncommon condition in young men. With increased understanding of the etiology of chronic lower urinary tract dysfunction, there has been significant improvement in the management of the condition. We have reviewed the current literature and make suggestions about diagnosis, treatment, and further research on this topic. We searched the PubMed database for the management of voiding dysfunction in young men using the following terms: voiding dysfunction, lower urinary tract symptoms, young men, risk factor, urodynamics study, uroflowmetry, magnetic resonance imaging, primary bladder neck obstruction/bladder neck dysfunction, dysfunctional voiding/pseudodyssynergia, impaired detrusor contractility/detrusor underactivity, adrenergic antagonist, transurethral incision, urotherapy, baclofen, and botulinum toxin. Uroflowmetry is an important noninvasive examination for screening young men for possible voiding dysfunction. A videourodynamic study is recommended for patients with low urine flow. Primary bladder neck obstruction and dysfunctional voiding are the two most common diagnoses. α-Adrenergic antagonists and urotherapy are widely used for treating bladder neck obstruction and dysfunctional voiding, respectively. Botulinum toxin A may become a potential therapeutic option in the future. Although the published reports usually included a small number of patients and lacked randomization and a placebo-controlled group, these clinical studies still provide great advances in managing voiding dysfunction in young men. Further well-designed studies are warranted to support optimal management of these conditions.     

良性前列腺增生患者逼尿肌功能的评估和治疗对策

目的　为了解良性前列腺增生（BPH）患者产生下尿路症状的成因,为正确诊治下尿路症状提供准确的证据。　方法　采用尿动力学方法分析无神经系统疾病的良性前列腺增生患者的膀胱尿道功能。　结果　164例良性前列腺增生患者,平均年龄67±7.04岁,膀胱出口梗阻者占61.6％（101/164）,无梗阻者占38.4％（63/164）;逼尿肌收缩力正常者为83%（136/164）,逼尿肌收缩力减弱者17％（28/164）,以上各组之间I-PSS评分和年龄无显著性差异。膀胱出口无梗阻者中逼尿肌收缩力减弱者占44.4%（28/63）,逼尿肌收缩力正常占55.6％（35/63）。在膀胱出口无梗阻者中,逼尿肌收缩力减弱合并不稳定膀胱患者为28.6％（8/28）,而逼尿肌收缩力正常合并不稳定膀胱患者57.1％（20/35）,膀胱出口无梗阻逼尿肌收缩力减弱合并不稳定膀胱患者明显少于膀胱出口无梗阻逼尿肌收缩力正常者（P＜0.02）,两组患者I-PSS评分和膀胱顺应性均无明显差异。　结论　BPH患者下尿路症状的产生不仅与前列腺增生引起的膀胱出口梗阻有关,部分患者并不存在膀胱出口梗阻,其下尿路症状的成因为逼尿肌功能变化所致,尿动力学检查能为下尿路症状患者的诊治提供可靠的依据。     

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.