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KMID : 0377220000250010104
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Medical Journal of Chosun Univercity
2000 Volume.25 No. 1 p.104 ~ p.109
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Peak Uroflow Rate Nomogram Related to Voiding Age and Voided Volume in Healthy Korean Male Living at the Kwangju Area
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Yoon Hee-Cheol
Park Hee-Su
Roh Joon
Jang Dae-Soo
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Abstract
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Background and Objective : The Peak or maximum uroflow rate has been useful in screening test for the diagnosis of lower urinary tract dysfunction, and is used as a parameter in the diagnosis of lower urinary tract dysfunction, such as prostatism, urethral stricture, or neurogenic bladder, and the postoperative assessment of adequate surgery in urologic patients. We need a peak uroflow rate nomogram for the adjusted peak uroflow, because uroflow in normal healthy men depends on the voided volume and decreases with age.
Materials and Methods : Peak flow rates and volumes voided were measured in 315 males who were free of voiding dysfunction, ranging in age from 10 to 80. To search for the equation of age, voided volume and peak uroflow, we used the least squares method for the equation providing least residual standard deviation by SPSS program.
Results : The equation of age, volume voided and peak flow rate is Q=24.383+0.413A-0.006934A2-1164.644/V (Q: peak flow rate, A: Age, V: voided volume). Means of measured age, volumes voided, and peak flow rate was 45.7, 227.6ml, and 20.7ml/sec respectively. At this point, reference peak uroflow is 23.6m1/sec. Adjusted peak uroflow was obtained by subtracting the difference between the measured and expected peak uroflow from the reference peak uroflow. According to the equation Q, We designed nomogram with adjusted peak uroflow rate used.
Conclusions : In our nomogram an adjusted peak flow rate <.8ml /sec(1.2 standard deviation) should be considered suspicious for lower urinary tract obstruction. This peak uroflow rate nomogram can be used clinically to evaluate lower urinary tract obstruction and its postoperative assessment.
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KEYWORD
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Peak uroflow, Nomogram
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