• Journal of Physiology & Pathology in Korean Medicine
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• v.28 no.1
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• pp.107-112
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• 2014

This study aimed to prove the effects of acupuncture treatment on acupoint Joksamni(ST36) related to gastrointestinal movement. Electrogastrogram (EGG) data were obtained in 11 healthy subjects treated by real or sham needle in single-blinded condition for 40 min, including before, during acupuncture treatment, and after removing needle. According to frequency analysis of EGG, median frequency(MF) was increased by real needle in 4 subjects, MF for another 2 subjects were increased by real and sham needle and no trend shift in MF showed in other 5 subjects. Our result showed that acupuncture treatment on Joksamni has some effects on gastrointestinal movement. In this study we have applied both real acupuncture and sham acupuncture on the same subjects. So its blinding was regarded as good but was effective in about 36%~55%. Two subjects were assumed that they showed placebo effects on both real and sham acupuncture. Therefore it is necessary to perform further study on case-control and a larger number of subjects with functional dyspepsia, in order to confirm our findings.

• The Journal of Internal Korean Medicine
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• v.41 no.3
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• pp.467-477
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• 2020

Objectives: This study investigated the cutaneous electrogastrogram (EGG) and other clinical characteristics of dyspeptic patients who have been diagnosed with Stomach Qi Deficiency (SQD) using the Scale for Stomach Qi Deficiency (SSQD). Methods: This study reviewed the clinical records of 38 patients with dyspepsia who were evaluated with SSQD and EGG at the Department of Digestive Diseases of Kyung Hee University Korean Medicine Hospital in Seoul, Korea from November 1, 2019 to February 29, 2020. We evaluated the EGG and other clinical characteristics of the SQD patients to determine if there was an association between the SSQD scores and the EGG. Results: In terms of the EGG, the SQD patients showed no significant increase in the percentage of normal slow wave after a meal and a slightly decreased power ratio at Channel 1 and Channel 2. We also found an association between the SSQD scores and the EGG parameters at Channel 1 and Channel 3. The average Ryodoraku score of the patients was 33.00±14.90 (μA). In the Heart Rate Variability (HRV) test, the average Total Power (TP) and Low Frequency/High Frequency (LF/HF)) ratio was 1356.60±13 6.41(ms²) and 1.68±2.25, respectively. Conclusions: The results of this study suggest that clinicians can use Electrogastrography to enhance accuracy when diagnosing the SQD pattern.

• Journal of Biomedical Engineering Research
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• v.23 no.2
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• pp.109-117
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• 2002

Electrogastrography(EGG) is a noninvasive method for measuring gastric electrical activity on the abdomen resulting from gastric muscle. EGG signals have a very low frequency range (0.0083 ~0.15 Hz) and extremely low amplitude(10~100 uV). Consequently, EGG signal is easily influenced by other noises. Both finite impulse response(FIR) and infinite impulse response (IIR) filters need high orders or have phase distortions for passing very narrow bandwidth of the EGG signal. In this study, we decomposed EGG signals using a wavelet multiresolution method with Daubechies mother wavelet. The EGG signals were decomposed to seven levels. We reconstructed signal by summing the decomposed signals from level four to seven. To evaluate the performance of the wavelet multiresolution filter(WMF) with simulated EGG signal using two kinds of FIR and four kinds of IIR filters., we used two indices; signal to noise ratio(SNR) and reconstruction squared error(RSE). The SNR of WMF had 9.5, 6.9, and 4.7 dB bigger than that of the other filters at different noise levels, respectively. Also, The RSE of WMF had $1.22{\times}10^6, 1.16{\times}10^6, 1.02{\times}10^6$ smaller than that of the other filters at different noise levels, respectively. The WMF performed better in the SNR and RSE than two kinds of FIR and four kinds of IIR filters.

• The Journal of Pediatrics of Korean Medicine
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• v.16 no.2
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• pp.199-213
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• 2002

We have surveyed the epidemiology of functional dyspepsia in 7 cases of Children and investigated the therapeutic effect on Functional Dyspepsia following 4 weeks medication of Naesowhajung-tang using Electrogastrogram. The Results were as followings: 1. Sex ratio are 6 males, 1 female; their mean ages, $9.0{\pm}1.41(7-11years)$; length, $137.2{\pm}13.86cm$; body weight, $35.3{\pm}l1.34kg$. 2. Most of subjects have a normal growth state. But one case have severe growth disturbance. Familial tendency for this disease is noted in 85.8%. 3. Abdominal pain was seen in 100% of subjects. The indicated symptom was lowed in order of abdominal pain(100%), nausea vomiting(71.43%), general fatigue(65.34%), vertigo headache(57.14%), belching(55.38%), etc. 4. The EGG finding after treatment was improved in 53%, aggrevated in 43. In cases, postprandial improvement was more remarkable than fasting improvement. Common cold and antibiotics seems to have functioned as an aggrevating factor on gastric motility. From the above results, Naesowhajung-tang seems to have been used in the treatment of functional dyspepsia for children.

• Journal of Biomedical Engineering Research
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• v.42 no.5
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• pp.211-224
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• 2021

Purpose: The purpose of this study is to present a way to alleviate motion sickness(MS) by stimulating acupoint through PEMFs, and to assess the effectiveness of PEMFs against stimulation previously used to stimulate acupoint using biosignal evaluations and surveys. Materials and Methods: Thirteen healthy men participated in the experiment. MS was induced in the participants, and MS relief stimulation was applied for 30 minutes. There were 4 types of MS relief stimulation, and Sham, Reliefband, Transcutaneous electrical nerve stimulation(TENS), and Pulsed electromagnetic fields stimulation(PEMFs) were used. The biosignals were measured during 30 minutes of applying MS relief stimulation, and the symptoms of MS were evaluated through a questionnaire survey. The measured biosignals are Electrocardiogram(ECG), Electrodermal activity(EDA), Respiration, Skin temperature(SKT), and Electrogastrogram(EGG). A one-way ANOVA test was performed for the rate of change by stimulation for MS relief over time. Results: Participants who were stimulated had a sharp decrease in MS symptoms. Biosignals were analyzed to evaluate autonomic nervous system activity, and the parasympathetic nervous system could be activated through stimulation. Conclusion: TENS and PEMFs were more effective in relieving MS symptoms than Reliefband. It is believed that PEMFs will be effective in consideration of the comfort of participants to be applied to actual vehicles, and studies to further verify the effects of PEMFs on MS should be conducted.