• Title/Summary/Keyword: Ambulatory urodynamics monitoring

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Design of ambulatory urodynamics monitoring system (휴대용 하부요로기능 검사 장치의 설계)

  • Lee, S.O.;Kim, K.S.;Yoon, D.Y.;Seo, J.H.;Song, C.G.
    • Proceedings of the KIEE Conference
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    • 2005.05a
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    • pp.48-50
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    • 2005
  • Urodynamics describes a collection of tests designed to evaluate lower urinary tract function and can be performed using retrograde filling of the bladder within a room. In this study, we designed and calibrated the potable urodynamics monitoring system using DSP chip (TMS320VC33, Texas Instrument$^{TM}$, U.S.) and collected pressure and EMG using calibration kit (DPT9022K0122, Medtronics$^{TM}$, U.S.). This system can make patients more comportable and monitor spontaneous urination during daily life.

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Portable urodynamics monitoring system based on ubiquitous technology (유비쿼터스 기반 휴대용 방광기능 검사 장치)

  • Kim, Keo-Sik;An, Yang-Su;Song, Chul-Gyu
    • Proceedings of the KIEE Conference
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    • 2007.04a
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    • pp.43-45
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    • 2007
  • We developed a portable urodynamics monitoring system using personal digital assistance (PDA) and proposed a new method for measuring the abdominal pressure in non invasive mode using surface EMG signals. This system is consisted of a signal conditioning and control module and could measure the vesical, abdominal and detrusor pressure. The result showed a high correlation coefficient between the practical abdominal pressure, using a conventional rectal catheter and the estimated values, by our proposed algorithm (r=0.81). This system should prove a useful tool in the future evaluations of ambulatory urodynamics monitoring study.

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Study for portable bladder function monitoring system (휴대용 방광기능 검사 장치에 대한 연구)

  • Kim, K.S.;Lee, S.O.;Lee, G.S.;Lee, T.H.;Kim, G.H.;Kim, H.J.;Jang, C.H.;Yoon, S.I.;Kim, C.H.;Chae, H.C.;Song, C.G.
    • Proceedings of the KIEE Conference
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    • 2005.10b
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    • pp.379-381
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    • 2005
  • Urodynamics describes a collection of tests designed to evaluate lower urinary tract function and can be performed using retrograde filling of the bladder within a room. In this study, we designed and calibrated the potable urodynamics monitoring system using DSP chip (TMS320VC33, Texas InstrumentTM, U.S.) and obtained signals of bladder(Pves) and bladder neck pressure(Pneck) and EMG using calibration kit (DPT9022K0122, MedtronicsTM, U.s,). This system monitor spontaneous urination during daily life and can make patients more comportable.

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Optimum electrode selection for measuring the abdominal pressure using bio-impedance method (비침습적 복압 측정을 위한 생체 임피던스 전극의 최적 위치 선정)

  • An, Yang-Su;Kim, Keo-Sik;Song, Chul-Gyu
    • Proceedings of the KIEE Conference
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    • 2007.04a
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    • pp.46-48
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    • 2007
  • In this study, we determined the optimum electrode pair for measuring the abdominal pressure using bio-impedance method. Because impedance changes differ from a weight, a height, contractile force, volume of muscle and blood other or whatever of individuals, it was quantified using values of impedance change, correlation coefficient and SNR. Our results showed the optimum electrode pair (1, 9) which could detect impedance changes due to an increase of the intensity of the abdominal pressure. The correlation coefficient and quadratic function between the RMS values of EMG and the impedance changes were 0.87 and $y=0.0014x^2$+0.0620x+0.6958, respectively. It demonstrated that the abdominal pressure could be measured non-invasively and simply using bio-impedance method. We propose that this optimum electrode configuration would be useful for future studies involving the convenient measurement of abdominal pressure by ambulatory urodynamics monitoring study.

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A New Approach Method of Measuring Abdominal Pressure for Urodynamic Monitoring System (요역동학 측정시스템을 위한 새로운 복압측정 기법)

  • Seo, Jeong-Hwan;Kim, Keo-Sik;An, Yang-Su;Kim, Kyeong-Seop;Song, Chul-Gyu
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.6
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    • pp.1170-1176
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    • 2007
  • The conventional urodynamic monitoring is fulfilled by artificially filling a bladder with saline. Generally. it is difficult to evaluate the physiological functions of the storage and voiding of a bladder. With this aim, we constructed an ambulatory urodynamic monitoring (AUM) system and proposed a novel method estimating abdominal pressure by measuring bio-impedance variations. Our system was clinically evaluated for 10 patients. It turned out to be that as the intensity of the abdomen contraction increased, the amplitude of bio-impedance signal and the RMS value of EMG increased more as compared to those who observed during the rest mode. Also, we determined the optimum electrode pair for estimating the abdominal pressure using bio-impedance method and consequently compared with the conventional methods. Because impedance changes differ from a weight, a height, contractile force, volume of muscle and blood other or whatever of individuals, it was quantified in terms of impedance change, correlation coefficient and SNR Our results showed the optimum electrode pair (1,9) which could detect impedance changes due to the increase of the intensity in the abdominal pressure. The correlation coefficient and quadratic function between the RMS values of EMG and the impedance changes were 0.87 and $y=0.0014x^2+0.0620x+0.6958$, respectively. Thus, our system demonstrated that the abdominal pressure could be measured noninvasively and conveniently by simply estimating bio-impedance values. We propose that this optimum electrode configuration would be useful for the future studies involving the handy measurements of abdominal pressure with our suggested ambulatory urodynamics monitoring system.

A Non-invasive Measurement of Abdominal Pressure on Ambulatory Urodynamics Study Using Surface Electromyography (휴대용 요역동학 검사 시 근전도 신호를 이용한 복압측정 방법)

  • Kim, Keo-Sik;Song, Chul-Gyu;Seo, Jeong-Hwan
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.45 no.6
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    • pp.132-140
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    • 2008
  • Conventional rectal catheters which are used for the measurement of abdominal pressure can cause erroneous result affecting detrusor pressure, and the catheter itself is not comfortable to the patients. To reduce these problems, we invented a new method for measuring abdominal pressure in non invasive manner using surface electromyography (EMG) signals of the rectus abdominis muscle. Our results showed that the correlation coefficient and root mean square error (RMSE) between the measured abdominal pressures by the conventional rectal catheters and the estimated values by our proposed algorithm were $0.79{\pm}0.06$ and $0.10{\pm}0.07$, respectively. These findings suggest that the surface EMG of rectus abdominis muscle might be used indirectly for more convenient measurement of abdominal pressure on ambulatory urodynamic study.

Optimum Electrode Selection for Measuring Abdominal Pressure using Bio-Impedance Method (생체 임피던스 방법을 이용하여 복압을 측정하기 위한 최적 전극위치 선정)

  • Kim, Keo-Sik;Lee, Sang-Ok;Seo, Jeong-Hwan;Kim, Kyeong-Seop;Song, Chul-Gyu
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.7
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    • pp.1339-1342
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    • 2007
  • In this study, we determined the optimum electrode pair for measuring the abdominal pressure using bio-impedance method and compared with conventional methods. Because impedance changes differ from a weight, a height, contractile force, volume of muscle and blood other or whatever of individuals, it was quantified using values of impedance change, correlation coefficient and SNR. Our results showed the optimum electrode pair (1, 9) which could detect impedance changes due to an increase of the intensity of the abdominal pressure. The correlation coefficient and quadratic function between the RMS values of EMG and the impedance changes were 0.87 and $y=0.0014x^2+0.0620x+0.6958$, respectively. It demonstrated that the abdominal pressure could be measured noninvasively and simply using bio-impedance method. We propose that this optimum electrode configuration would be useful for future studies involving the convenient measurement of abdominal pressure by ambulatory urodynamics monitoring study.