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Detrusor Pressure Lower In Women With Stress Incontinence
A DGReview of :"Voiding dynamics in women: a comparison of pressure-flow studies between asymptomatic and incontinent women"
Urology
02/28/2002
By David Loshak
Women with stress urinary incontinence void at a lower detrusor pressure. A chronically reduced outlet resistance during bladder filling, which probably contributes to stress urinary incontinence, also appears to affect the voiding phase in stress-incontinent women.
These observations are suggested by findings which confirm the normative pressure-flow data in women, say urologists at University of Texas Southwestern Medical Center, Dallas, Texas, United States.
The urologists set out to define the normative values for pressure-flow studies in asymptomatic women and to compare them with the values in women with stress incontinence.
They recruited 20 asymptomatic women aged 30-70 (mean 41.7) years from the community to undergo urodynamic studies. Only women with no or minimal symptoms on the Urogenital Distress Inventory Questionnaire, minimal pelvic organ prolapse and no previous surgery for incontinence were included.
The results of the pressure-flow studies were compared with the values from women evaluated for stress urinary incontinence between December 1998 and August 2000.
The pressure-flow data of the 20 asymptomatic women were compared with 40 women with symptoms of pure stress urinary incontinence selected from the 415 who underwent urodynamic studies during this period. Of these, 16 were found to have stress urinary incontinence during the urodynamic study.
The average maximal flow was 17.2 ± 6.7 millilitres per second in the control population and 22.0 ± 6.8 millilitres per second among women with genuine stress urinary incontinence during the urodynamic study.
The detrusor pressure at the maximal flow averaged 24 ± 10 centimetres of water for the control urinary incontinence group. The detrusor pressure at the maximal flow averaged 16.0 ± 8.6 centimetres of water for the stress urinary incontinence groups.
The voided volumes for the stress urinary incontinence group were 419 millilitres compared with 330 millilitres in controls.
Urology 2002; 59(1):42-46.
"Voiding dynamics in women: a comparison of pressure-flow studies between asymptomatic and incontinent women"
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