Journal ArticleDOI
Non-invasive measurement of bladder pressure using an external catheter.
Johan J.M. Pel,Ron van Mastrigt +1 more
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TLDR
A newly developed external catheter is validated to measure non‐invasively this pressure, which avoids the risk of damaging or infecting the urethral and bladder wall as occurs with invasive urodynamics.Abstract:
Previous studies showed that, on the basis of a combination of maximum flow rate and isovolumetric bladder pressure, objectively diagnosing infravesical obstruction is possible. In this study, we validated a newly developed external catheter to measure non-invasively this pressure, which avoids the risk of damaging or infecting the urethral and bladder wall as occurs with invasive urodynamics. To evaluate the external catheter, we simultaneously recorded the internal bladder pressure signal (measured invasively) and the external pressure signal (measured non-invasively) in 40 non-obstructed and obstructed patients. Additionally, we tested whether the external pressure depended on bladder volume in five healthy volunteers. The simultaneously measured internal bladder pressure and external pressure showed good agreement in the non-obstructed patients. There was less agreement in the obstructed group. Nevertheless, the external pressure in these patients was significantly higher than in the non-obstructed patients. The maximum external pressure depended significantly on the bladder volume in all volunteers. We concluded that isovolumetric bladder pressure can be measured non-invasively with the external catheter. In non-obstructed patients, this pressure accurately represents the internal bladder pressure. We think that it is possible to distinguish between obstructed patients and patients with a weak detrusor by combining the non-invasively measured isovolumetric bladder pressure with a separately measured maximum flow rate. Neurourol. Urodynam. 18:455-475, 1999.read more
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Journal ArticleDOI
Detrusor Underactivity and the Underactive Bladder: A New Clinical Entity? A Review of Current Terminology, Definitions, Epidemiology, Aetiology, and Diagnosis
Nadir I. Osman,Christopher R. Chapple,Paul Abrams,Roger R. Dmochowski,François Haab,Victor W. Nitti,Heinz Koelbl,Philip Van Kerrebroeck,Alan J. Wein +8 more
TL;DR: To review the current terminology, definitions, and diagnostic criteria in use, along with the epidemiology and aetiology of DU, as a basis for building a consensus on the standardisation of current concepts, a review of the literature and the development of optimal management approaches is conducted.
Journal ArticleDOI
Noninvasive measurement of bladder pressure by controlled inflation of a penile cuff.
TL;DR: A new noninvasive test to measure bladder pressure in males based on controlled inflation of a penile cuff during voiding based on mean simultaneous isovolumetric bladder pressure plus or minus standard deviation agreed well.
Journal ArticleDOI
Development of a non-invasive strategy to classify bladder outlet obstruction in male patients with LUTS.
TL;DR: A simple, non‐invasive classification strategy is developed to identify BOO in those male patients who did not strain during voiding and found that the relatively high abdominal pressures in these patients were not reflected in the externally measured bladder pressure.
Journal ArticleDOI
Systematic Review of the Performance of Noninvasive Tests in Diagnosing Bladder Outlet Obstruction in Men with Lower Urinary Tract Symptoms
Sachin Malde,Arjun Nambiar,Roland Umbach,Thomas B. Lam,Thomas B. Lam,Thorsten Bach,Alexander Bachmann,Marcus J. Drake,Mauro Gacci,Christian Gratzke,Stephan Madersbacher,Charalampos Mamoulakis,Kari A.O. Tikkinen,Stavros Gravas +13 more
TL;DR: A thorough and comprehensive review of the literature to determine if there were less uncomfortable but equally effective alternatives to urodynamics for diagnosing bladder problems found that some simple tests appear to be promising, although they are not as accurate.
Journal ArticleDOI
Noninvasive methods of diagnosing bladder outlet obstruction in men. Part 2: Noninvasive urodynamics and combination of measures.
Mohammed Belal,Paul Abrams +1 more
TL;DR: A combination of noninvasive urodynamics and ultrasound derived measures provide promising methods of diagnosing bladder outlets obstruction, however, pressure flow studies still remain the gold standard for assessing bladder outlet obstruction.
References
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Journal ArticleDOI
Statistical methods for assessing agreement between two methods of clinical measurement.
TL;DR: An alternative approach, based on graphical techniques and simple calculations, is described, together with the relation between this analysis and the assessment of repeatability.
Journal ArticleDOI
The heat of shortening and the dynamic constants of muscle
TL;DR: In this article, a more accurate and rapid technique for muscle heat measurement was proposed, and some astonishingly simple and accurate relations have been found, which determine the effect of load on speed of shortening, allow the form of the isometric contraction to be predicted, and are the basis of the so-called "visco-elasticity" of skeletal muscle.
Journal ArticleDOI
Standardization of terminology of lower urinary tract function: pressure-flow studies of voiding, urethral resistance, and urethral obstruction
Derek Griffiths,Klaus Höfner,Ron van Mastrigt,Harm J. Rollema,Anders Spångberg,Donald M. Gleason +5 more
TL;DR: This report contains a recommendation for a provisional standard method for defining obstruction on the basis of pressure-flow data and more detailed analyses of Pressure-flow relationships, described below, are advisable to aid diagnosis and to quantify data for research studies.
Journal ArticleDOI
Quantification of urethral resistance and bladder function during voiding, with special reference to the effects of prostate size reduction on urethral obstruction due to benign prostatic hyperplasia
TL;DR: In pressure/flow studies of adult voiding the behaviour of the urethra can be distinguished from that of the bladder, and quantified separately, as follows.