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KMID : 1137820070280040577
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의공학회지
2007 Volume.28 No. 4 p.577 ~ p.584
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Validation of Urine Volume Evaluation by Hydraulic Pressure Measurement
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Kim Kyung-Ah
Choi Sung-Soo
Lee In-Kwang
Park Kyung-Soon
Kim Wun-Jae
Cha Eun-Jong
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Abstract
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Uroflowmetry is non-invasive and easily performed to diagnose benign prostatic hypertrophy(BPH) frequent in aged men. Weight change during urination is usually measured to estimate the urinary flow rate by a load cell, but sensitive to any impacts against the bottom of the container, leading to unnecessary noise generation. Moreover, load cells are relatively expensive raising the production cost. The present study proposed a new technique, measuring hydraulic pressure on the bottom of the urine container to evaluate the urinary volume. Low cost pressure transducer enabled almost perfectly linear relationship between the urine volume and the hydraulic pressure. During both the simulated and human urination experiments, variance of the pressure signal was more than 50% smaller than the weight signal acquired by a load cell, which demonstrated that the impact noise was decreased to a great degree by pressure compared to weight measurement.
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KEYWORD
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uroflowmetry, urinary volume measurement, benign prostate hypertrophy
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