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Use of Doppler ultrasound for non-invasive urodynamic diagnosis

OBJECTIVES: A totally non-invasive transperineal urodynamic technique using Doppler ultrasonography has been developed. METHODS: Since normal urine does not have blood cells, urine was thought not to produce the Doppler effects. However, basic studies confirmed that the decrease of pressure at high...

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Autores principales: Ozawa, Hideo, Watanabe, Toyohiko, Uematsu, Katsutoshi, Sasaki, Katsumi, Inoue, Miyabi, Kumon, Hiromi
Formato: Texto
Lenguaje:English
Publicado: Medknow Publications 2009
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2684302/
https://www.ncbi.nlm.nih.gov/pubmed/19468440
http://dx.doi.org/10.4103/0970-1591.45548
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author Ozawa, Hideo
Watanabe, Toyohiko
Uematsu, Katsutoshi
Sasaki, Katsumi
Inoue, Miyabi
Kumon, Hiromi
author_facet Ozawa, Hideo
Watanabe, Toyohiko
Uematsu, Katsutoshi
Sasaki, Katsumi
Inoue, Miyabi
Kumon, Hiromi
author_sort Ozawa, Hideo
collection PubMed
description OBJECTIVES: A totally non-invasive transperineal urodynamic technique using Doppler ultrasonography has been developed. METHODS: Since normal urine does not have blood cells, urine was thought not to produce the Doppler effects. However, basic studies confirmed that the decrease of pressure at high velocity (Bernouilli effect) caused dissolved gas to form microbubbles, which are detected by Doppler ultrasonography. Subjects sat and the probe was advanced via remote control to achieve gentle contact with the perineal skin. The digital uroflow data signals and the color Doppler ultrasound video images were processed on a personal computer. The flow-velocity curves from two sites; the distal prostatic urethra just above the external sphincter (V1) and the sphincteric urethra (V2) were plotted against time. The parameters of both the pressure-flow studies and the Doppler ultrasound urodynamic studies were compared in men who had various degrees of obstruction. RESULTS: Functional cross-sectional area at prostatic urethra (A1), calculated by Q(max)/V1, was lower in the group of bladder outlet obstruction (BOO) vs. control group. Velocity ratio (VR), which was calculated by V1/V2, was the parameter having the best correlation with BOO index, though A1 had a similar correlation. This method is viable to diagnose the degree of BOO. CONCLUSIONS: The development of non-invasive Doppler ultrasound videourodynamics (Doppler UDS) will dramatically expand the information on voiding function.
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spelling pubmed-26843022009-05-22 Use of Doppler ultrasound for non-invasive urodynamic diagnosis Ozawa, Hideo Watanabe, Toyohiko Uematsu, Katsutoshi Sasaki, Katsumi Inoue, Miyabi Kumon, Hiromi Indian J Urol Symposium OBJECTIVES: A totally non-invasive transperineal urodynamic technique using Doppler ultrasonography has been developed. METHODS: Since normal urine does not have blood cells, urine was thought not to produce the Doppler effects. However, basic studies confirmed that the decrease of pressure at high velocity (Bernouilli effect) caused dissolved gas to form microbubbles, which are detected by Doppler ultrasonography. Subjects sat and the probe was advanced via remote control to achieve gentle contact with the perineal skin. The digital uroflow data signals and the color Doppler ultrasound video images were processed on a personal computer. The flow-velocity curves from two sites; the distal prostatic urethra just above the external sphincter (V1) and the sphincteric urethra (V2) were plotted against time. The parameters of both the pressure-flow studies and the Doppler ultrasound urodynamic studies were compared in men who had various degrees of obstruction. RESULTS: Functional cross-sectional area at prostatic urethra (A1), calculated by Q(max)/V1, was lower in the group of bladder outlet obstruction (BOO) vs. control group. Velocity ratio (VR), which was calculated by V1/V2, was the parameter having the best correlation with BOO index, though A1 had a similar correlation. This method is viable to diagnose the degree of BOO. CONCLUSIONS: The development of non-invasive Doppler ultrasound videourodynamics (Doppler UDS) will dramatically expand the information on voiding function. Medknow Publications 2009 /pmc/articles/PMC2684302/ /pubmed/19468440 http://dx.doi.org/10.4103/0970-1591.45548 Text en © Indian Journal of Urology http://creativecommons.org/licenses/by/2.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Symposium
Ozawa, Hideo
Watanabe, Toyohiko
Uematsu, Katsutoshi
Sasaki, Katsumi
Inoue, Miyabi
Kumon, Hiromi
Use of Doppler ultrasound for non-invasive urodynamic diagnosis
title Use of Doppler ultrasound for non-invasive urodynamic diagnosis
title_full Use of Doppler ultrasound for non-invasive urodynamic diagnosis
title_fullStr Use of Doppler ultrasound for non-invasive urodynamic diagnosis
title_full_unstemmed Use of Doppler ultrasound for non-invasive urodynamic diagnosis
title_short Use of Doppler ultrasound for non-invasive urodynamic diagnosis
title_sort use of doppler ultrasound for non-invasive urodynamic diagnosis
topic Symposium
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2684302/
https://www.ncbi.nlm.nih.gov/pubmed/19468440
http://dx.doi.org/10.4103/0970-1591.45548
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