Characteristics of Urinary Incontinence in Elderly Patients Studied by 24-Hour Monitoring and Urodynamic Testing

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Abstract
Characteristics of urinary incontinence have been studied in 100 elderly incontinent patients using invasive video-urodynamics and noninvasive 24-h monitoring of incontinence, fluid intake, voiding and residual urine. Incontinence was of the urge type in 51 patients, including 24 with reduced bladder sensation. Noninvasive 24-h monitoring showed satisfactory reproducibility and high sensitivity (88%) for detecting urine loss. Urodynamically proven urge incontinence, especially in combination with reduced sensation, and recent bacteriuria were associated with severe urine loss on 24-h monitoring. On 24-h monitoring, urine output was significantly larger at night and nocturia was common. In urge incontinence urine loss was predominantly nocturnal and the amount depended significantly on the previous evening's fluid intake and on nocturia. Noninvasive 24-h monitoring showed that post-void residual was common and was often largest in the early morning. It also yielded many free-voiding flow curves. Normal flow curves with small residual urine make dysfunction of voiding itself unlikely. Thus noninvasive monitoring provides information about incontinence and voiding that is suitable for designing intervention and management strategies. Invasive testing may be necessary however to confirm the urodynamic type of incontinence or suspected voiding dysfunction.

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