• 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.

• Journal of Acupuncture Research
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• v.19 no.1
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• pp.175-188
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• 2002

Objective : The effects of SP6(Sanyinjiao, 三陰交) acupuncture stimulation on bladder parasympathetic nerve activity (PNA), tibial nerve activity (TNA) as well as blood pressure were examined in anesthetized rats and the results are as follows. Methods : The parasympathetic nerve leading to the bladder was exposed retroperitoneally, and the tibial nerve in the hindlimb was exposed through inguinal area. PNA and TNA were recorded using a bipolar platinum-iridium wire electrode and it was connected to preamplifier. Blood pressure was measured using cannula that was inserted into femoral artery and was recorded with blood pressure sensor that is connected with transducer amplifier. The mean value of all parameters measured for 30 seconds before the stimulation was expressed as 100%. An acupuncture needle was inserted into the SP6 region to a depth of 4 mm. Results : Under intact state (IS), acupuncture stimulation for 120 seconds induced significant increase of PNA which was accompanied with decrease of blood pressure. At the same time, TNA showed temporary increase only with acupuncture stimulation. In 4 mg/kg of naloxone-administrated state (NAS), significant decrease of PNA was seen and it was accompanied with increase of blood pressure. TNA also showed temporary increase only with acupuncture stimulation under the NAS just like the IS. Conclusion : consider that SP6(Sanyinjiao, 三陰交) acupuncture stimulation activated parasympathetic nerve and caused vasodilation to lead into the diuresis, but naloxone reversed the effect of acupuncture for antidiuresis.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.17 no.5
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• pp.58-63
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• 2018

Recently in weapon systems development, the importance of reliability has been emphasized due to the increase in complexity and the rapid development of key components and components. Accordingly, the importance of lifespan testing is increased. However, lifespan testing to verify the reliability of a system is costly and takes a lot of time. Therefore in this paper, it was demonstrated that the most critical item of a bladder type accumulator is the bladder. Fatigue life is sensitive to temperature and pressure, with temperature having more impact. The fatigue life of the bladder was estimated to be 18,140 hr through fatigue analysis, which satisfies the required life expectancy of 10,000 hr.

• Korean Journal of Acupuncture
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• v.19 no.2
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• pp.41-49
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• 2002

Objectives : The aim of the present study is to observe effects of acupuncture related with the nerve system, Inferior mesenteric nerve activity(IMNA) was examined on BL60 acupuncture closely connected with the bladder and HT8 with little tied. Materials and methods : Acupunctures were performed during 100 seconds after stabilization. IMNA was measured by micromanipulator, preamplifier, mean arterial pressure(MAP) and heart rate were observed by blood pressure transducer, 4-channel transducer amplifier in anesthetized rat. Results : On BL60 acupuncture, the heart rate was not significantly decreased but IMNA, MAP were significantly decreased and Maximum peak of IMNA was increased during inserted acupuncture, decreased after ejected acupuncture respectively. On HT8 acupuncture, IMNA was decreased during acupuncture than before acupuncture but the others did not showed signigicant difference. Conclusions : Our results demonstrated a meridian interaction between BL60 acupoint in the bladder channel and Inferior mesenteric sympathetic nerve related to the bladder. This fact suggest that BL60 acupuncture have effect on the bladder through the nerve system. Meanwhile, IMNA was decreased during HT8 acupuncture. This result is supposed HT8 to have not meridian function but acupoint function by another mechanism. It needs to be closely examined other meridians and nerve by the optimal approaching method.

• Proceedings of the KIEE Conference
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• 2004.11c
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• pp.313-315
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• 2004

Urodynamic study system is widely used for neurogenic bladder patients in various clinical setting. Generally they include 2 pressure sensors from bladder and rectum, and 1 EMG sensor. The rectal pressure catheter is often the source of data error because of gas passage and the fall out of the catheter from anus, and source of discomfort in ambulatory urodynamic system. This study is to design and calibrate the ambulatory digital urodynamic study system that can discard the rectal pressure catheter, which can make patients more comfortable and doctors can get more physiologic data. As a first step, we compared our new system with Dantec $Duet^{(r)}$ urodynamic system (Dantec, Denmark) and wanted to see the possibility of our new system.

• Proceedings of the KIEE Conference
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• 2003.11c
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• pp.943-945
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• 2003

This study is to evaluate the change of intra-abdominal pressure related with intravesical and intrarectal pressure in patients with spinal cord injury according to daily activities and postural changes which make the abdominal pressure elevated. The intravesical and the intrarectal pressures were obtained during patient's speech, sneeze, cough, valsalva and various postural changes with supine to decubitus, derubitus to supine, supine to sit, and sit to supine according to empty and full bladders, respectively. The order of higher intravesical and intrarectal pressure rise during various maneuvers were valsalva, sneeze, supine to sit and cough, respectively. Higher correlation coefficient between the intrvesical and intrarectal pressures were noted during cough, sneeze, valsalva and supine to sit in empty bladder than full one. These results demonstrated that the intravesical and intrarectal pressures were influenced by daily activities and postural changes of increasing the intra-abdominal pressure. The intrarectal pressures according to daily activities such as cough, sneeze, valsalva and postural change were significantly related with intravesical pressures.

• Journal of Acupuncture Research
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• v.23 no.4
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• pp.225-236
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• 2006

Objectives : This report intended to estimate effects taken by using Dong-Qi Acupuncture Therapy on a patient with neurogenic bladder induced by transverse myelitis(712, L1 level). Methods : From 6th May, 2005 to 30th June, 2005. The patient received Dong-Qi Acupuncture Therapy. Results : 1. Since being hospitalized, the patient's voiding has improved from intermittent catheterization to independent urination state. And the volume of residual urine has decreased from 150cc-350cc to 0cc-l0cc. 2. The urodynamic findings showed that first sensation, maximal detrusor pressure, compliance and maximal bladder capacity changed from 456ml to 195mL, from 29cmH2O to 31cmH2O, from none to 25.31mL/cmH2O, from under 650mL to 590mL, respectively. Conclusion : We considered Dong-Qi Acupuncture Therapy had a useful effect on Neurogenic Bladder.

• Asian Pacific Journal of Cancer Prevention
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• v.15 no.24
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• pp.10971-10975
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• 2015

Objective: To investigate bladder and intestinal function recovery and quality of sexual life after laparoscopic nerve-sparing radical hysterectomy (LNRH) for treatment of early invasive cervical carcinoma. Methods: Subjects included patients who underwent radical hysterectomy by laparotomy who were randomly assigned to 2 groups: 30 patients who underwent LNRH and 35 classical laparoscopic radical hysterectomy (LRH). We assessed the patients general clinical information, surgical characteristics, pathological findings, and adjuvant therapies. A urodynamic study was used to assess bladder function. Intestinal function recovery and quality of sexual life were evaluated by questionnaire. Results: No significant differences were found in age, surgery characteristics, pathological findings, adjuvant therapies, and main adverse effects between the 2 groups. The mean duration of the postoperative catheterization (DPC) in group LNRH was shorter than that in group LRH (P < 0.001). The maximum flow rate, maximum cystometric capacity, maximum detrusor pressure and urinary complications in group LNRH were better than those in group LRH. The quality of sexual life evaluated according to the female sexual function index (FSFI) was better in group LNRH than in those who underwent LRH. The intestinal function of patients in group LNRH also recovered better compared with patients in group LRH.

• Journal of Acupuncture Research
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• v.32 no.2
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• pp.105-121
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• 2015

Objectives : The purpose of this study is to observe the effects of Sa-am acupuncture with tonifications of kidney and urinary bladder on radial pulse in healthy subjects. Methods : Sixty healthy subjects participated in this study, and were divided into a kidney tonifying acupuncture group(KI group), urinary bladder tonifying acupuncture group(BL group) and control group. Radial pulse was measured by 3 dimensional pulse imaging system(DMP-3000) before, immediately after, 30 minutes after, and 60 minutes after acupuncture at Cun, Guan, and Chi in each time. Results : 1. BL group exhibited significantly reduced T1 / T, T4 / T, T4 / (T-T4), T5 / T and increased(T-T4) / T compared to KI group. 2. BL group showed increase of radial augmentation index / heart rate(RAI / HR) in left Cun, H5, Ad / Ap in left Chi, H1, As / Ap in right Chi compared to KI group. BL group showed decrease of As / Ap, Aw / Ap in left Chi, H1, pulse depth, Ad / Ap in right Chi compared to KI group. 3. KI group showed increase of Aw / Ap, H1, H2, H4, pulse area in right Guan, pulse depth in right Chi compared to BL group. KI group showed decrease of RAI in left Cun, applied pressure, pulse depth in left Guan, Aw / Ap in right Chi compared to BL group. Conclusions : The effects of Sa-am acupuncture with tonifications of kidney and urinary bladder in healthy humans have been observed on various parameters. The parameters analysed in this study can be used to differentiate the effects of Sa-am acupuncture with tonifications of kidney and urinary bladder on radial pulse.

• 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.