Detrusor pressure in ambulatory versus standard urodynamics

An ambulatory urodynamic examination was performed on 28 non-neurogenic incontinent patients in whom classical cystometry could not confirm objectively the history and clinical diagnosis of urinary incontinence. In 12 of 13 stress-incontinent patients, real leakage could be demonstrated. Of 15 patients with mixed incontinence, bladder instability was found in 8 and urethral instability in 2. Voiding detrusor pressures in ambulatory measurements were approximately 10 cm H2O higher than in classical cystometry, although the voided volumes were lower. Advantages and pitfalls of ambulatory detrusor pressure monitoring are discussed.