Study of micturition parameters in healthy young adults using a uroflowmetric method

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Abstract
With the 21 F [French] DISA mictiograph, the instant urine flow curves of 50 normal males and 33 females (aged from 18-35 yr) were analyzed. A total of 363 micturitions was obtained (146 in the female group, 217 in the male group). Ten parameters were derived from each of the urine flow curves. These parameters were the voided volume, the micturition time, the average flow rate, the flow at 2 s, the maximum flow rate, the percentage of difference between the maximum flow rate and the average flow rate, the duration until the maximum flow rate, the initial slope of the curve, the slope at the time from micturition initiation of voiding to maximum flow and the difference between the 2 slopes. The urine flowmeter allowed, even at very low voided volume, a complete interpretation of micturition flow curves, a finding which might be useful in pediatric patients. The flow parameters were significantly more favorable in females than in males, and consequently better hydrodynamics conditions for micturition exist in women than in men.