Browse > Article
http://dx.doi.org/10.5369/JSST.2009.18.6.423

Enhancement of signal-to-noise ratio for uroflowmetric test regardless of urination situation  

Kim, Kyung-Ah (School of Medicine, Chungbuk National University)
Choi, Seong-Su (School of Medicine, Chungbuk National University)
Lee, Sang-Bong (School of Medicine, Chungbuk National University)
Kim, Kyoung-Oak (Seoul Asan Medical Center)
Park, Kyung-Soon (Department of Nursing, Munkyung College)
Shin, Eun-Young (School of Medicine, Chungbuk National University)
Kim, Wun-Jae (School of Medicine, Chungbuk National University)
Cha, Eun-Jong (School of Medicine, Chungbuk National University)
Publication Information
Journal of Sensor Science and Technology / v.18, no.6, 2009 , pp. 423-431 More about this Journal
Abstract
Standard uroflowmetry measures the urine weight using single load cell to evaluate the urinary flow rate. Impact noise should be introduced due to gravity when the urine stream falls down into the container upon the load cell. The present study placed three load cells on the three vertices of a regular triangle and the three signals were ensemble averaged to enhance the signal-to-noise ratio(SNR) regardless of how the urination was made. Simulated urination experiment was performed with three different urine collection methods. In all three methods, SNR of the averaged signal was much higher than each load cell signals. With no urine collection device, the present signal averaging technique resulted in SNR values higher by 10~15 dB than when dual funnels or upper funnel were used to guide the urine stream. Therefore, it was demonstrated that the three point measurement followed by with ensemble averaging could enable accurate uroflowmetric test without any specially made urine collection devices.
Keywords
benign prostatic hyperplasia; uroflowmetry; urinary flow rate; signal-to-noise ratio;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 M. J. Barry, F. J. Jr Fowler, M. P. O'Leary, R. C. Bruskewitz, H. L. Holtgrewe, and W.K. Mebust, 'Correlation of the AUA symptom index with self administered versions of the Madsen-Iversen, Boyarsky and Maine medical assessment program symptom indexes', J. Urol., vol. 148, pp. 1558-1563, 1992   DOI
2 M. J. Barry, F. J. Jr Fowler, M. P. O'Leary, R. C. Bruskewitz, H. L. Holtgrewe, and W. K. Mebust 'The american urological association symptom index for benign prostatic hyperplasia', The Measurement Committee of the AUA, J. Urol., vol. 148, pp. 1549-1557, 1992   DOI
3 대한전립선학회, 전립선비대증, 일조각, 서울, pp. 127-146, 2004.
4 정도운, 조성택, 남기곤, 정문기, 전계록, '로드셀을 이용한 요류검사기의 구현 및 평가', 센서학회지, 제13권, 제6호, pp. 436-445, 2004   과학기술학회마을   DOI
5 A. Fleisch, 'Der pneumotachography: ein Apparatzur Beischwindgkeitregstrierung der Atemluft', Arch. Ges. Physiol. vol. 209, pp. 713-722, 1925   DOI
6 김경아, 이태수, 차은종, '기능성 일회용 호흡관의 소형화 연구', 센서학회지, 제14권, 제3호, pp. 250-257, 2005   과학기술학회마을   DOI
7 대한전립선학회, 전립선비대증, 일조각, pp. 3-15, 2004
8 B. K. Pradhan and K. Chandra, 'Morphogenesis of nodular hyperplasiaprostate', J. Urol., vol. 113, pp. 210-219, 1975   DOI
9 P. Abrams, 'In support of pressure-flow studies dor evaluating men with lower urinary symptoms', Urology, vol. 44, pp. 153-155, 1994   DOI   ScienceOn
10 E. Shapiro and H. Lepor, 'Pathophysiology of clinical benign prostatic hyperplasia', Urol. Clin. North Am., vol. 22, pp. 285-290, 1995   ScienceOn
11 J. Y. Grayhack, 'Changes with aging in human seminal vesicle fluid fructose concentration and seminal vesicle weight', J. Urol., vol. 86, p. 142, 1961   DOI
12 H. A. Guess, H. M. Arrighi, E. J. Metter, and J. L. Fozard, 'Cumulative prevalence of prostatism matches the autopsy prevalence of benign prostatic hyperplasia', Prostate, vol. 17, pp. 241-246, 1990   DOI   ScienceOn
13 C. G. Roehrborn, C. J. Girman, and T. Rhodes, 'Correlation between prostate size estimated by digital rectal examination and measured by transrectal ultrasound', Urology, vol. 49, pp. 548-543, 1997   DOI   ScienceOn
14 M. D. Rifkin, A. B. Kurtz, H. Y. Choi, and B. B. Goldberg, 'Endoscopic ultrasonic evaluation of the prostate using a transrectal probe: prospective evaluation and acoustic characterization', Radiology, vol. 149, pp. 265-271, 1983   DOI   ScienceOn