尿流动力学在女性下尿路症候群诊治中的应用

目的评估尿流动力学在女性下尿路症候群（LUTS）分类和治疗中的作用。方法采用尿动力测定仪对127例女性下尿路症候群患者进行尿流动力学检查,并根据检查结果进行分类及相关治疗,治疗后观察临床症状变化并复查尿流动力学各项参数进行对照。结栗不稳定膀胱30例（26．8％）,低顺应性膀胱10例（8．9％）,逼尿肌无力12例（10．7％）,尿道压增高89例（79．5％）,尿动力学无明显异常15例（11．8％）。112例尿动力学异常患者经相应治疗后有效97例,有效率为86．6％。结论尿流动力学检查在女性LUTS的诊断分型及指导治疗上具有重要意义。     

New Data on Tolterodine: Do Recent Findings Dispel Questions About Treating Overactive Bladder in Men?

Overactive bladder (OAB) is a syndrome characterized by urinary urgency, with or without urgency urinary incontinence (UUI), usually with frequency and nocturia. These symptoms represent a subset of lower urinary tract symptoms (LUTS). Results from epidemiologic studies conducted in the United States and Europe suggest that OAB affects 11–16% of men. Although OAB is frequently associated with detrusor overactivity, the coexistence of OAB symptoms and prostatic conditions (e.g., benign prostatic hyperplasia, benign enlargement of the prostate, and bladder outlet obstruction [BOO]) in men adds complexity to the diagnosis and appropriate treatment. Men with OAB symptoms are more often prescribed pharmacotherapies that target the prostate (e.g., α-receptor antagonists, 5α-reductase inhibitors) rather than the bladder (e.g., antimuscarinics), possibly due to a tendency among clinicians to attribute all LUTS to prostate disease. Thus, a subset of men who receive treatment for prostatic conditions may have persistent OAB symptoms. Moreover, some physicians may be concerned that the inhibitory effect of antimuscarinic agents on detrusor contraction could aggravate the voiding difficulties of, or cause urinary retention in, men with OAB and possible BOO. Recent prospective studies and post hoc analyses of data from men with OAB symptoms and other LUTS, with or without concomitant BOO (not significant BOO at risk for urinary retention), have suggested that tolterodine improves OAB symptoms without an increased incidence of acute urinary retention. However, the literature would benefit from larger and longer placebo-controlled studies.     

尿动力学检查在糖尿病患者膀胱功能评定中的意义

目的探讨尿动力学检查在糖尿病患者膀胱功能障碍诊断中的意义。方法伴有下尿路症状(LUTS)的糖尿病患者42例，年龄38～78岁，男24例，女18例。糖尿病发病1个月一25年。结果42例患者完成尿动力学全项检查41例，尿动力学表现异常者38例(93％)，尿动力学表现正常3例(7％)；膀胱逼尿肌收缩减低14例(34％)；膀胱逼尿肌反射消失10例(24％)；膀胱出口梗阻13例(32％，13／41)；女性压力性尿失禁1例。结论伴有LUTS的糖尿病患者膀胱功能异常发生率高，尿动力学检查可以明确膀胱逼尿肌功能，对合并糖尿病的LUTS患者正确诊断和治疗具有重要意义．糖尿病患者行膀胱尿道手术前进行尿动力学检查可提高手术成功率。     

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.     

Correlation between lower urinary tract symptoms and urethral function in benign prostatic hyperplasia

AIM: To examine the potential correlation between urethral function and lower urinary tract symptoms (LUTS) in men with benign prostatic hyperplasia (BPH). METHODS: Thirty-one patients with clinical BPH, who were confirmed to have benign prostatic enlargement (BPE) of 20 ml or more, were enrolled into the study. A mark-sheet questionnaire was used for obtaining the LUTS history. Multichannel pressure-flow urodynamic studies were performed and external urethral sphincter pressure (PEUS), intravesical pressure (PVES), and bladder neck pressure (PBN) were recorded both at maximum cystometric capacity and during voiding with 5-microtip transducers, for the purpose of detecting BPE-specific urodynamic findings at different levels within the urethra. RESULTS: There was a positive correlation between hesitancy and detrusor bladder neck dyssynergia (DBND) (P = 0.0011) and between incomplete emptying and low PBN at maximum cystometric capacity (P = 0.0425). The hesitancy proved to have no correlation with bladder neck opening time (TBNO). CONCLUSION: Urodynamic evaluation of urethral function was beneficial for attributing LUTS to clinical BPH. Among various parameters, DBND was the most specific to clinical BPH, suggesting it to be a situation where a steep rise in PBN or prostatic urethral pressure remains greater than the increasing PVES, resulting in sustained difficulty in opening the bladder neck and subsequently the subjective sensation of hesitancy.     

Is multichannel urodynamic assessment necessary before considering a surgical treatment of BPH? Pros and cons

Purpose

Lower urinary tract symptoms (LUTS) are common in middle-aged men and could be consequences of multiple etiologies responsible for bladder outlet obstruction (BOO), detrusor underactivity (DUA) and/or overactive bladder. When LUTS are suggestive of BOO secondary to benign prostatic hyperplasia, a surgical treatment can sometimes be consider. Even if multichannel urodynamic study (UDS) is currently the gold standard to properly assess LUTS, its use in non-neurogenic men is still a matter of controversy. Here, we aim to explore the evidence supporting or not the use of systematic multichannel UDS before considering an invasive treatment in men LUTS.

Methods

The debate was presented with a “pro and con” structure. The “pro” side supported the systematic use of a multichannel UDS before considering a surgical treatment in men LUTS. The “con” side successively refuted the “pro” side arguments.

Results

The “pro” side mainly based their argumentation on the poor correlation of LUTS and office-based tests with BOO or DUA. Furthermore, since a multichannel UDS could allow selecting men that will most benefit of a surgical procedure, they hypothesized that such an approach could reduce the overall morbidity rate and cost associated with. The “con” side considered that, in most cases, medical history and symptoms were reliable enough to consider surgery. Finally, they underlined the UDS limitations and the frequent lack of alternative to surgery in this context.

Conclusions

Randomized clinical trials are being conducted to compare these two approaches. Their results would help the urological community to override this debate.

     

Botulinum toxin A treatment for lower urinary tract symptoms/benign prostatic hyperplasia

Botulinum toxin A (BoNT-A) has been widely used in the treatment of overactive bladder and neurogenic detrusor overactivity. Recently, prostatic injection of BoNT-A had been tried to reduce the prostate volume and relieve lower urinary tract symptoms (LUTS) in patients with benign prostatic enlargement (BPE) due to benign prostatic hyperplasia (BPH). However, the efficacy of BoNT-A on BPE is still controversial. Traditionally, male LUTS have been considered as synonym of BPE because most male LUTS developed in aging men. Recent investigations have revealed that bladder dysfunction and bladder outlet dysfunction other than BPE contribute equally in male LUTS. Injecting BoNT-A into the prostatic urethra and bladder neck yielded improvement of LUTS, but not reduction of the prostatic volume, especially in men with small prostatic volume. The therapeutic effects of BoNT-A on LUTS might not be due to prostatic volume reduction, but through inhibiting the adrenergic hyperactivity in men with LUTS/BPH. This article discusses the current consensus and controversy of BoNT-A treatment on LUTS/BPH.     

Urodynamic Effects of Once-Daily Tadalafil in Men with LUTS Secondary to Clinical BPH

Lower urinary tract symptoms (LUTS) are common and increase with age in men with benign prostatic hypertrophy (BPH). Erectile dysfunction (ED) also increases with age and is often a comorbid condition with BPH. Treatment with phosphodiesterase type 5 (PDE5) inhibitors aimed at decreasing breakdown of nitric oxide (NO) is a mainstay of treatment for ED. Because NO has been found to mediate male prostatic and urinary function in multiple ways, there is increasing interest in PDE5 inhibitors addressing concomitant LUTS. Several studies have shown significant improvement in LUTS after treatment with PDE5 inhibitors; however, concern exists that PDE5 inhibitors exert their beneficial effects through impairment of bladder function. Because limited invasive urodynamic data exist to address these queries, tadalafil’s impact on bladder function was recently evaluated. Results indicate that tadalafil treatment had no negative impact on bladder function, as measured by detrusor pressure at maximum flow or any other urodynamic parameter assessed.     

A shifted paradigm for the further understanding, evaluation, and treatment of lower urinary tract symptoms in men: focus on the bladder

Lower urinary tract symptoms (LUTS) are highly prevalent among older men and have a negative impact on health-related quality of life. Frequent comorbidity with potential prostatic disease adds complexity to the management of male LUTS. In this review, we discuss the pathophysiological conditions that underlie male LUTS, and examine the relationship between symptoms and urodynamic findings. The contribution of bladder dysfunction to male LUTS, with a particular emphasis on overactive bladder (OAB) symptoms, is explored. We also consider pharmacotherapeutic options for male LUTS. Pharmacotherapies that target the prostate (alpha1-receptor antagonists and 5alpha-reductase inhibitors) often fail to alleviate OAB symptoms, and may not be the most appropriate therapy for men with storage LUTS. Multiple studies have suggested that antimuscarinic therapy alone or in combination with alpha1-receptor antagonists improve OAB symptoms in men with and without bladder outlet obstruction. Although these agents may represent appropriate first-line therapies for men with OAB symptoms, the therapeutic potential of antimuscarinics alone or in combination with alpha1-receptor antagonists in this population should be evaluated in large-scale, well-designed clinical trials.     

Videourodynamics identifies the causes of young men with lower urinary tract symptoms and low uroflow

OBJECTIVES: Using videourodynamics (VUDS) we prospectively investigated the etiologies of lower urinary tract symptoms (LUTS) and low uroflow in young men and correlated the results with clinical symptoms and noninvasive exams. METHODS: From 1999 to 2001, 90 men 18-50 years old with LUTS and low uroflow were enrolled. Patients with active urinary tract infection, congenital urogenital diseases, neurological diseases, diabetes mellitus or urinary tract malignancy were excluded. Evaluation included International Prostate Symptom Score (I-PSS), renosonography, transrectal ultrasonography of prostate and VUDS. The clinical parameters were compared in the different diagnostic groups of patients classified by VUDS. RESULTS: Mean patient age was 37.5+/-7.8 years and mean symptom duration was 28.3+/-21.3 months. Mean total I-PSS was 19.8, voiding 11.1 and storage 8.7. VUDS showed dysfunctional voiding in 39 (43%), primary bladder neck obstruction in 37 (41%), impaired detrusor contractility in 9 (10%) and benign prostatic obstruction in 5 (6%). Patients with impaired detrusor contractility had higher symptoms scores and poorer quality of life than those in the other diagnostic groups. Mean age and size of prostate in patients with benign prostatic obstruction were greater than those in the remaining groups. The remaining clinical symptoms or noninvasive tests could not predict a specific urodynamic diagnosis. CONCLUSIONS: VUDS is recommended to make an accurate diagnosis in young men with LUTS and low uroflow because few clinical symptoms or noninvasive tests were helpful in this regard.     

DETRUSOR INSTABILITY IN MEN: CORRELATION OF LOWER URINARY TRACT SYMPTOMS WITH URODYNAMIC FINDINGS

PURPOSE: We evaluated the correlation of lower urinary tract symptoms suggestive of detrusor instability with urodynamic findings in men. MATERIALS AND METHODS: Enrolled in our prospective study were 160 consecutive neurologically intact men referred for urodynamic evaluation of persistent lower urinary tract symptoms. All patients had storage symptoms suggestive of detrusor instability. Patients were further clinically categorized according to the chief complaint of urge incontinence, frequency and urgency, nocturia or difficult voiding. The clinical and urodynamic diagnosis in all patients as well as specific urodynamic characteristics of those with detrusor instability were analyzed according to the these 4 clinical categories. RESULTS: Mean patient age was 61 +/- 15 years. The chief complaint was urge incontinence in 28 cases (17%), frequency and urgency in 57 (36%), nocturia in 30 (19%) and difficult voiding in 45 (28%). Detrusor instability was diagnosed in 68 cases (43%). A higher incidence of detrusor instability was associated with urge incontinence than with the other clinical categories (75% versus 36%, p <0.01). Of the patients 109 (68%) had bladder outlet obstruction, including 50 (46%) with concomitant detrusor instability. The prevalence of bladder outlet obstruction was similar in all patients regardless of the chief complaint. All other urodynamic diagnoses were also similar in the 4 clinical categories. The mean bladder volume at which involuntary detrusor contractions occurred were lower in patients with urge incontinence and frequency and urgency than in those with nocturia and difficult voiding (277.1 +/- 149.4 and 267.7 +/- 221.7 versus 346.7 +/- 204.6 and 306.2 +/- 192.1 ml., respectively, not statistically significant, p = 0.07). CONCLUSIONS: Detrusor instability and bladder outlet obstruction are common in men with lower urinary tract symptoms. The symptom of urge incontinence strongly correlated with detrusor instability. Other lower urinary tract symptoms did not correlate well with any urodynamic findings. Therefore, we believe that an accurate urodynamic diagnosis may enable focused and more efficient management of lower urinary tract symptoms in men.     

Veränderungen des Rezeptorprofils der alternden Blase

Future demographic developments will challenge urology with a steadily increasing incidence of lower urinary tract symptoms (LUTS) derived from the aging bladder. Obstruction, instability and hypocontractility, which may be caused by changes in the receptor profile of the detrusor, are typical pathophysiologic findings in geriatric bladder dysfunction. Benign prostatic hyperplasia and diabetes mellitus are age-associated comorbidities with an additional influence on bladder receptors. Muscarinic (M(2), M(3)), purinergic (P2X, P2Y) and adrenergic receptors (alpha(1), beta(3)) are targets of efferent sympathetic and parasympathetic bladder innervation.Although the results from animal experiments are somewhat inconsistent, aging and bladder outlet obstruction (BOO) probably cause partial cholinergic denervation of the detrusor with a subsequent upregulation of muscarinic receptor sensitivity leading to bladder instability. The non-cholinergic (atropine-resistant) component of the detrusor contraction rises with aging and BOO to 50%, emphasizing the increasing impact of purinergic receptors in geriatric LUTS. alpha(1)-adrenergic receptors are modulated in the aging bladder by a shift from the predominant alpha(1a) subtype to the alpha(1d) subtype, which shows 100-fold higher affinity towards norepinephrine and increases alpha-adrenergic bladder susceptibility.No data are available on the changes in beta(3) receptor density or sensitivity with aging. Moreover, the role of sensory C-fiber receptors in geriatric LUTS remains completely unclear, although specific C-fiber blockers are already under clinical evaluation (capsaicin, resiniferatoxin).     

Urodynamic evaluation and management prior to renal transplantation

OBJECTIVES: To evaluate the indications for urodynamics studies (UDS) previous to renal transplantation (RT) and the results of bladder cycling (BC), performed in selected cases. METHODS: Among 475 RT, 33 patients (6.9%) required UDS according our protocol. Indications were: (1) low urinary tract symptoms (LUTS); (2) defunctionalized bladder (DB), and (3) complex urologic history (reflux, neurogenic bladder, urethral valves, etc.). DB was defined as a total urinary output of <300 ml/24 h. Patients with DB underwent BC through a suprapubic catheter, undergoing UDS after BC. The rate and type of urodynamic anomalies were compared among the 3 groups. Cystometric capacity (CysCap) and compliance were evaluated according to the etiology of renal failure, diuresis, and number of previous bladder surgeries. RESULTS: Fifteen patients (45%) showed abnormal UDS, Increased pressure at cystometry was the most frequent finding (46%). The rate of abnormal UDS among the 3 groups was not statistically significant (66.6% in DB, 42.8% in LUTS, and 35% in those with complex urologic history). Compliance and CysCap were significantly lower in the patients with DB, showing a significant correlation with diuresis. These parameters did not correlate with the number of previous bladder surgeries. BC resulted in normal UDS in 3 patients (33%) and a change in diagnosis in 2 patients (22%). CONCLUSION: Our indications gave a good diagnostic yield. Patients with DB represent a group with different urodynamic findings. BC provides a more precise diagnosis or normalization of UDS in some cases.     

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.     

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.     

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。     

良性前列腺增生合并梗阻的相关因素

前列腺增生、膀胱出口梗阻和下尿路症状是一组既独立又相关的因素 ,良性前列腺梗阻 (BPO)则反映上述 3因素的交错和重合 ,也是临床治疗的直接目标 ,本文综述近年来有关前列腺增生合并BPO的相关因素的研究进展 ,着重讨论了尿流动力学、前列腺组织学、前列腺及其尿道形态学等改变与BPO关系     

The International Prostate Symptom score in both sexes: a urodynamics-based comparison.

The aim of our study was to determine the urodynamic basis for the observation that aging women report comparable benign prostatic hyperplasia (BPH) symptom scores as age-matched men. Sixty-seven women (mean age, 60.4 +/- 1.5 years; mean +/- standard error of the mean) and 70 age-matched men (mean age, 63.7 +/- 0.9 years; P > 0.05) entered this prospective study. Men were referred for the diagnostic workup of lower urinary tract symptoms (LUTS) due to BPH and women predominantly for urinary incontinence. All patients completed the International Prostate Symptom score (IPSS) with quality-of-life assessment and underwent a detailed clinical and urodynamic evaluation including a multichannel pressure-flow study. Results of the IPSS, quality-of-life assessment, and irritative and obstructive component of the IPSS were correlated with urodynamic findings and the respective data were compared in both sexes. The mean IPSS was 15.7 for men and 13.0 for women (P = 0.02), quality-of-life score was higher in women (4.2 vs. 3.4; P = 0.0008). The irritative score was significantly higher in women (8.7 vs. 6.8; P = 0.003). Incidence of detrusor instability (DI), however, was higher in men (women, 38.1%; men, 48.6%; P = 0.015) and bladder capacity was higher in women (425 vs. 333 ml; P = 0.0001). There was no correlation between incidence and degree of DI with the irritative score in both sexes. The obstructive score was significantly higher in men (8.8 vs. 4.4; P = 0.0001). Ninety-one percent (64/70) of men had urodynamically documented bladder outlet obstruction (BOO), whereas this was the case in only 9% (6/67) of women. In parallel to the irritative score, we could not identify a correlation between the degree of urodynamically proven BOO and the obstructive score in both sexes. This urodynamics-based comparison fails to give an explanation for the observation that aging women report similar BPH scores as men. These data suggest that other mechanisms, such as changes in diurnal urine production, structural alterations of the aging detrusor, endocrine disturbances affecting lower urinary tract function, and subtle urodynamic changes are responsible.     

Variability of detrusor overactivity on repeated filling cystometry in men with urge symptoms: comparison with spinal cord injury patients

OBJECTIVE: To investigate the variation in urodynamic variables during repeated filling cystometry and the impact that the variability had on the observed incidence of detrusor overactivity, to evaluate the correlation of detrusor overactivity with the symptoms of urge in men with lower urinary tract symptoms (LUTS), and to compare the variability of detrusor overactivity in men with LUTS to that in men with spinal cord injury (SCI). PATIENTS AND METHODS: Sixty men with LUTS and 35 with neurogenic bladders after SCI were assessed. Investigations included the International Prostate Symptom Score (IPSS), Madsen-Iversen Symptom Score (MSS), uroflowmetry, filling cystometry and pressure-flow, in three successive studies. RESULTS: In men with LUTS, a significant decrease in the number and pressure of involuntary detrusor contractions (IDCs) in consecutive cystometries resulted in a reduction of observed detrusor overactivity from 72% to 63% and 48%, in the three studies. Urgency scores were significantly lower in men who became 'stable' than in those who remained 'unstable' throughout the three studies. In men with SCI, cystometric variables and detrusor overactivity remained consistent over sequential studies. CONCLUSION: Urodynamic detrusor overactivity is affected by repeated cystometry. In men with LUTS, two populations with detrusor overactivity were identified; one group adapted to repeated filling while another had persistent IDCs and greater urgency scores. The latter group had bladder behaviour similar to that of men with neurogenic bladders secondary to SCI. These findings might be important in explaining the cause of symptoms, initiating further investigation, and predicting the outcome of therapy.     

Pressure flow study: a useful diagnostic test of female lower urinary tract symptoms

AIMS: To compare pressure flow parameters in the different urodynamic diagnoses in women with lower urinary tract symptoms (LUTS). MATERIALS AND METHODS: Urodynamic traces of women with LUTS were prospectively studied. Detrusor pressures at the start of flow (ODP), detrusor pressure at peak flow rate (PdetQmax), peak flow rate (Qmax) and detrusor pressure at the end of flow (CDP) were measured and compared with different urodynamic diagnoses. RESULTS: Six hundred and twenty one women were prospectively investigated between September 2000 and February 2002. Only 85% (529/621) of women had good quality pressure flow studies and was included in the study. Women with detrusor overactivity have higher ODP, CDP and PdetQmax than women with urethral sphincter incompetence. All these pressure flow parameters are significantly lower in women with urethral sphincter incompetence than continent women (P < 0.05, Bonferroni test). Qmax was significantly greater in women with urodynamic stress incontinence compared to women who had detrusor overactivity (P < 0.05, Bonferroni test). Women with mixed incontinence had pressure flow parameters intermediate between women with detrusor overactivity and those with urodynamic stress incontinence. CONCLUSIONS: Pressure flow parameters appear to be useful urodynamic tools in the evaluation of women with LUTS as they help the clinician in assessing the urethral and detrusor function.