The urodynamic evaluation of lower urinary tract symptoms in men

Griffiths, Derek; Abrams, Paul; D’Ancona, Carlos Arturo Levi; Kerrebroeck, Philip Van; Nishizawa, Osamu; Νitti, Victor W.; Tatt, Foo Keong; Tubaro, Andrea; Wein, Alan J.; Belal, Mo

doi:10.1007/s11884-008-0008-5

Cited by 5 publications

(8 citation statements)

References 65 publications

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“…23 Although the exact mechanism of residual urine in the bladder after ceasing urination has yet to be elucidated, a steeper reduction in the hydraulic energy of the prostatic urethra might have some effect on the early termination of the voiding reflex via an unknown pathway. Because voiding dysfunction is identical to an enhanced loss of the hydraulic energy of urine during passage through the urethra, subjective estimation may correspond to the hydraulic condition.…”

Section: Discussionmentioning

confidence: 99%

Analysis of Energy Loss Mediated by an Alpha-1 Blocker in Patients with Benign Prostatic Hyperplasia Using a Virtual Urethra Processed from an Endoscopic Video Image

Sazuka

Kambara

Ishii

et al. 2012

Journal of Endourology

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Section: Discussionmentioning

confidence: 99%

Analysis of Energy Loss Mediated by an Alpha-1 Blocker in Patients with Benign Prostatic Hyperplasia Using a Virtual Urethra Processed from an Endoscopic Video Image

Sazuka

Kambara

Ishii

et al. 2012

Journal of Endourology

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show abstract

Section: Discussionmentioning

confidence: 99%

“…In this study, the improved UC was tested clinically, and the measured values of parameters used for diagnostic decision were compared with those obtained with the PFS approach, which is considered the gold standard for urodynamic evaluation. 4 The UC method is based on the equilibration of the hydrostatic pressure throughout the lower urinary tract and in the device in the absence of flow (ie, upon interruption of micturition), so that the pressure measured in the UC outlet would be equivalent to the intravesical pressure. 12 Other alternative methods are also based in this principle, and interruption of the urine flow is often achieved by some kind of automatic control.…”

Section: Discussionmentioning

confidence: 99%

“…Even though PFS is the gold standard test for BPH evaluation, it is an invasive, expensive, and time‐consuming medical procedure. Additionally, this procedure carries the risk of causing hematuria and infection …”

Section: Introductionmentioning

confidence: 99%

“…Additionally, this procedure carries the risk of causing hematuria and infection. [4][5][6] Alternative methods have been developed for measurement of vesical pressure in a minimally invasive manner. A research group at the Erasmus University (Rotterdam, The Netherlands) developed a device named "condom catheter," based on a male incontinence condom.…”

Section: Introductionmentioning

confidence: 99%

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Minimally invasive measurement of vesical pressure for diagnosis of infravesical obstruction

Almeida

D’Ancona

Bassani

2017

Neurourology and Urodynamics

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Comparative study of the maximum Watts factor and Schafer contractility grade, bladder contractility index in male patients with lower urinary tract symptoms

Liu

Chen²,

Han³

et al. 2018

Medicine

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To investigate whether the maximum Watts factor (WF) is 1 parameter of describing detrusor contraction in male patients with lower urinary tract symptoms (LUTS).We retrospectively reviewed urodynamic data of male subjects with LUTS. Data on age, maximum flow rate (Qmax), post-void residual (PVR), detrusor pressure at maximum flow rate (PdetQmax), maximum Watts factor (WFmax), and Schafer contractility grades were collected. First, all patients were divided into 6 groups according to Schafer contractility grade. The urodynamic parameters include WFmax and bladder contractility index (BCI) were compared and analyzed among the 6 groups by using Kruskal–Wallis test statistically. The box plot of Schafer contractility grade with WFmax or BCI were plotted and analyzed. Second, the correlation scatter diagram between WFmax and BCI was plotted and analyzed. Spearman's correlation test was performed. Third, we drew the Receiver Operating Characteristic (ROC) curve and confirmed the area under the curve, the Optimal Operating Point (OOP) and corresponding sensitivity and specificity for WFmax by the reference standard of Schafer contractility grade and BCI respectively.A total of 455 men were included. The mean age of patients was 57 ± 17.9 years, ranging from 18 to 87 years. Median of WFmax increased from 5.8 W/m2 in very week (VW) group to 19.5 W/m2 in strong (ST) group, while BCI rose from 70 to 170. The box plot of Schafer contractility grade with WFmax or BCI showed that both WFmax and BCI were positively correlated with Schafer contractility grade. Kruskal-Wallis test among the 6 groups showed statistically significant difference (P <.001). The correlation scatter diagram showed that WFmax increased significantly with BCI (Fig. 3), the linear regression equation being Y = 3.33 + 0.07X, R2 = 0.298. Spearman's correlation test revealed that WFmax and BCI were positively correlated, with the correlation coefficient being 0.616 (P <.001). The WFmax area under ROC curve by Schafer contractility grade was 0.894 and WFmax OOP was interpreted at 11.1 W/m2. In addition, the area under ROC curve by BCI was 0.802 and WFmax OOP was interpreted at 9.8 W/m2.Our findings suggestted that WFmax was a good parameter of evaluating detrusor contraction as well as Schafer contractility grade and BCI, which should be widely used in clinical.

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The urodynamic evaluation of lower urinary tract symptoms in men

Cited by 5 publications

References 65 publications

Analysis of Energy Loss Mediated by an Alpha-1 Blocker in Patients with Benign Prostatic Hyperplasia Using a Virtual Urethra Processed from an Endoscopic Video Image

Analysis of Energy Loss Mediated by an Alpha-1 Blocker in Patients with Benign Prostatic Hyperplasia Using a Virtual Urethra Processed from an Endoscopic Video Image

Minimally invasive measurement of vesical pressure for diagnosis of infravesical obstruction

Comparative study of the maximum Watts factor and Schafer contractility grade, bladder contractility index in male patients with lower urinary tract symptoms

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