Document Detail


Fluid perfused urethral pressure profilometry and Valsalva leak point pressure: a comparative study in a biophysical model of the urethra.
MedLine Citation:
PMID:  17576565     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In patient studies the correlation between maximum urethral closure pressure (MUCP) and Valsalva leak point pressure (LPP) is meagre at best (r = 0.22-0.50). We therefore studied the relation between MUCP and LPP in a flexible and extensible model urethra. We applied differently sized pressure zones and different degrees of resistance to a biophysical model urethra by stepwise inflating three types of blood pressure cuff placed around the model. At each degree of resistance we measured detrusor LPP, an in vitro equivalent of Valsalva LPP. Subsequently, we recorded the Urethral Pressure Profile using a water-perfused 5F end-hole catheter at four withdrawal rates and five perfusion rates and calculated MUCP. We tested the dependence of LPP on pressure zone length and MUCP on perfusion rate, withdrawal rate and pressure zone length using analysis of variance. We tested the correlation between LPP and MUCP using Pearson's correlation coefficient and Linear Regression. LPP did not significantly depend on the pressure zone length (P = 0.80) and increased linearly with increasing cuff pressure. MUCP also increased with increasing cuff pressure, however, MUCP significantly depended (P < 0.01) on perfusion rate, withdrawal rate and pressure zone length. MUCP increased with increasing perfusion rate, and decreased with increasing withdrawal rate. In our model urethra MUCP only accurately reflected urethral resistance for a very limited number of combinations of perfusion rate and withdrawal rate. LPP reflected urethral resistance independent of the type of pressure zone.
Authors:
Tim Idzenga; Johan J M Pel; Ron van Mastrigt
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-06-19
Journal Detail:
Title:  World journal of urology     Volume:  25     ISSN:  0724-4983     ISO Abbreviation:  World J Urol     Publication Date:  2007 Aug 
Date Detail:
Created Date:  2007-08-21     Completed Date:  2007-12-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8307716     Medline TA:  World J Urol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  423-9     Citation Subset:  IM    
Affiliation:
Department of Urology, Erasmus MC, Sector Furore, room EE1630, PO Box 2040, 3000 CA Rotterdam, The Netherlands. t.idzenga@erasmusmc.nl
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MeSH Terms
Descriptor/Qualifier:
Humans
Models, Biological*
Pressure
Urethra / physiology*
Urodynamics / physiology*
Valsalva Maneuver / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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