Abstract
To determine whether transvaginal ultrasound measurement of bladder wall thickness can be used as a screening test for detrusor instability in women with urinary symptoms. A blinded prospective study. A London teaching hospital. One hundred and eight-four symptomatic women presenting to a urodynamic clinic. The detection of detrusor instability by means of videocystourethrography (VCU) and ambulatory urodynamics in women with a mean bladder wall thickness of greater than 5 mm measured by transvaginal ultrasound. One hundred and eight women had a mean bladder wall thickness of greater than 5 mm. Ninety-four percent (102) of these women had detrusor instability either when undergoing VCU or ambulatory urodynamics. Seventeen women had a bladder wall thickness of less than 3.5 mm of whom three were found to have detrusor instability on VCU. The measurement of a mean bladder wall thickness greater than 5 mm with transvaginal ultrasound is a sensitive screening method for diagnosing detrusor instability in symptomatic women without outflow obstruction.
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