A new instrument for computing the urethral resistance in urodynamic studies

Smith, D. B.; Anikwe, R.M.

doi:10.1007/bf02477122

Med. & biol. Engng.

1975

DOI: 10.1007/bf02477122

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A new instrument for computing the urethral resistance in urodynamic studies

D. B. Smith

R.M. Anikwe

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1978

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Direct Recording of Urethral Resistance Using the “Urethroresistance”

Anikwe

1978

Journal of Urology

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Observations on urethral resistance during micturition in non-obstructed men and in patients with bladder outlet obstruction owing to benign prostatic hypertrophy are presented. The "Urethroresistance", a new instrument, was used for the direct recording of urethral resistance. The upper limit for the minimum urethral resistance during micturition for normal non-obstructed men was 0.5 units. Two patterns of urethral resistance were observed solely in non-obstructed subjects and 3 other patterns, which were found solely in patients with a moderate or severe degree of bladder outlet obstruction, were shown to be characteristic of bladder outlet obstruction. While direct recording of urethral resistance is a better test for bladder outlet obstruction than the recording of urinary flow rate the recording of urinary flow is a simple urodynamic test, which remains a useful screening test for bladder outlet obstruction. With the exception of severe obstructive symptoms none of the other clinical methods for the assessment of bladder outlet obstruction--the size of the prostate gland, the volume of post-micturition residual urine and the degree of bladder trabeculation--is reliable to determine the degree of bladder outlet obstruction.

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Direct Recording of Urethral Resistance Using the “Urethroresistance”

Anikwe

1978

Journal of Urology

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Urodynamics in Benign Prostatic Hypertrophy

Anikwe

1978

British Journal of Urology

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Synchronous urinary flow and pressure studies were carried out on 51 male subjects of whom 12 were normal subjects and 39 had benign prostatic hypertrophy with varying degrees of bladder outlet obstruction. A urodynamic scoring system was evolved for accurate and objective diagnosis of bladder outlet obstruction. The minimum urethral resistance was found to be the most valuable single urodynamic parameter for the diagnosis of bladder outlet obstruction. Hitherto this urodynamic parameter was determined through tedious calculations. In the course of the present study a new instrument, the Urethroresistance, was devised for the direct recording of urethral resistance during micturition.

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A new instrument for computing the urethral resistance in urodynamic studies

Cited by 2 publications

References 1 publication

Direct Recording of Urethral Resistance Using the “Urethroresistance”

Direct Recording of Urethral Resistance Using the “Urethroresistance”

Urodynamics in Benign Prostatic Hypertrophy

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