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BLAIR BELL RESEARCH SOCIETY

The study seeks a less invasive test than cystometry to confirm incontinence objectively. Accurate detection of urinary leakage can be obtained by measurement of electric conductance in the distal urethra. Simultaneous recording of detrusor pressure and urethral electric conductance enables a correlation to be drawn between them. A short probe with two ring electrodes is placed in the distal urethra so that the electrodes record 1.5 cm from the external urethral meatus. Passage of urine past the electrodes causes a rise in their conductivity reading. The symptoms, cystometric findings and DUEC results of 115 women with incontinence are compared. Three patterns of urinary leakage can be identified during DUEC testing, which can be related to both symptoms and cystometric diagnosis. In patients with stress incontinence proven on cystometry, DUEC detected all cases but in addition picked up 20 extra patients from a group of 59. As DUEC only detects urinary leakage, cystometrically proven detrusor instability is detected if leakage occurs. Pick-up with DUEC does, however, enhance cystometric diagnosis as more provocation is used.