下部尿路の尿流動態研究 : II.排尿パラメーターのコンピューター分析

概要

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Thirty-five micturition parameters of urinary flow curves have been statistically evaluated by computer analysis. The How rate and urinary volume voided were calculated every second by the analysis of flow curve. Parameters involve the correlation found among How rate, total urinary volume, volume voided each second, voiding time and sex. A How curve, obtained through Mictiograph (DISA, 14F43), was photographed and mounted on a slide. Enlarged curve by a slide projector was plotted every second with Graph pen, which was simultaneously recorded on teletype printer, 249 How curves out of 500 obtained in 150 healthy male and female volunteers aged from 18 to 45 were fed into a digital computer. Experimental study of the accuracy of Mictiograph demonstrated that the change in urinary stream velocity and centripetal force on the rotating disk had yielded a significant error upon its How rate and the subsequent total urinary volume computed in the present study. The response to change in urinary volume alone was quite satisfactory. The volume coefficient (computed urinary volume/real urinary volume) was found spread between 0.5 and 1.3. Reliability of data to be utilized for computer analysis was defined to be ±15 percent of volume coefficient, which further reduced the number of How curves from 249 to 176.
社団法人日本泌尿器科学会の論文