Document Detail

Evaluation of novel technique for studying ureteral function in vivo.
MedLine Citation:
PMID:  17263618     Owner:  NLM     Status:  MEDLINE    
BACKGROUND AND PURPOSE: Knowledge of the ureteral response to instrumentation is limited. Ureterodynamic parameters such as intraureteral pressure, conduction velocity, direction of peristalsis, and electromyography have been measured using a variety of methods; however, these techniques are impractical for routine clinical use. The aim of this study was to evaluate a new commercial ureteral pressure transducer catheter, which records peristaltic frequency, conduction velocity, and intraureteral pressure. This device was assessed in an animal model and in patients who had undergone ureteroscopy. MATERIALS AND METHODS: An ambulatory urodynamic monitoring system was adapted to record the output from two pressure transducers mounted on a 4F ureteral catheter, which was inserted into the left ureters of six anesthetized pigs to record peristalsis. In six patients who had undergone ureteroscopy with or without stone removal, the recording catheter was inserted at the end of the procedure, and recovery of peristalsis was monitored for as long as 24 hours. RESULTS: The un-instrumented pig ureter showed spontaneous peristalsis immediately on catheter insertion, whereas the instrumented human ureter displayed a variable response that appeared to be related to previous physical or pharmacologic effects. CONCLUSIONS: Peristaltic frequency, pressure, and conduction velocity can be measured with the ureteral catheter described in both the experimental and clinical settings. Within the first 24 hours after ureteroscopy, peristaltic recovery is variable. Such information may enable both elucidation of the underlying mechanisms and improvement in the treatment of a variety of upper urinary-tract disorders.
Anthony J Young; Peter L Acher; Bruce Lynn; Philip J McCahy; Ronald A Miller
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Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  Journal of endourology / Endourological Society     Volume:  21     ISSN:  0892-7790     ISO Abbreviation:  J. Endourol.     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2007-01-31     Completed Date:  2007-03-08     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8807503     Medline TA:  J Endourol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  94-9     Citation Subset:  IM    
Department of Urology, Maidstone Hospital, Maidstone, Kent, UK.
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MeSH Terms
Diclofenac / pharmacology
Models, Animal
Peristalsis / drug effects
Ureter / drug effects,  physiology*
Urinary Catheterization / methods*
Urodynamics / drug effects
Reg. No./Substance:

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

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