• The Journal of Internal Korean Medicine
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• v.37 no.2
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• pp.361-367
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• 2016

Objective: This clinical study reports on the effect of traditional Korean medicine on a patient with generalized anxiety disorder.Method: A patient who suffered from generalized anxiety disorder was treated with herbal medicine (Guibiondamtang-gami), acupuncture, moxibustion, and pharmacopuncture. We assessed the changes of anxiety-related symptoms with the state-trait anxiety inventory (STAI) score, the Beck anxiety inventory (BAI) score, a heart rate variability (HRV) test, and a second derivative of photoplethymogram waveform (SDPTG) test.Results: After taking Guibiondamtang-gami for 22 days, the patient’s STAI score, BAI score, and LF/HF (low-frequency/high-frequency heart rate variability) ratio decreased, while the differential pulse wave index and stress power in the SDPTG test increased.Conclusion: This clinical case study has demonstrated that traditional Korean medicine may be an effective option for treating generalized anxiety disorder.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1979-1980
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• 2008

본 논문은 심혈관질환을 예방하기 위한 심박변이도 검사(HRV), 압맥파 검사(PTG), 용적맥파 검사(SDPTG), 사지혈압 검사(BPD), 맥파전달속도 검사(PWV)를 통해 심혈관의 상태를 분석하고 질병을 예방하는데 도움이 될 수 있도록 측정하고 진단 할 수 있는 심혈관 질환에 대한 통합 진단 시스템을 개발하였다. 본 논문에서 개발된 진단 시스템을 통해서 나오는 결과에 대한 소개하였다.

• Journal of Biomedical Engineering Research
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• v.38 no.3
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• pp.95-101
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• 2017

In this study, photoplethysmography(PPG) was suggested as a way to replace the ankle-brachial index(ABI) in diagnosing PAD. The method using the PPG was presented for the simplification of the PAD diagnosis method which was used before. And the index related to the health condition of the artery from the PPG measured in both big toes of the subjects through the experiment was drawn. The indexes showing the significant relativeness in the Pearson correlation analysis with the ABI were the stiffness index(SI), reflection index(RI); it was confirmed each of them had the correlation coefficient of 0.688, and 0.637 at p < 0.05. The explanation ability of the linear regression equation derived using ABI, SI and RI was 52.5%. The explanation ability of the secondary curve regression equation derived using ABI, squared SI was 54.7%. It is expected to provide patients with significant results and draw the index associated with PAD by measuring PPG easily in the real life instead of the ambulatory care field.

• The Journal of the Society of Korean Medicine Diagnostics
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• v.10 no.2
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• pp.54-66
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• 2006

Objective : To review the method, parameters, system of electrogastrography and to study its oriental medical application. Method : We investigate the research results through internet search engines such as Pubmed, China National Knowledge Infrastructure. Conclusion : Electrogastrography is believed to be of great use to the verification of treatment effect of herbal medicine that is used in internal medicine and neuropsychiatry, along with the objectification and quantification of diagnosis of oriental medicine related to gastric peristalsis and balance of autonomic nervous system. I would therefore like to conclude that there should be continued study and active application of electrogastrography in the wide variety of oriental medicine.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2001.11a
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• pp.169-172
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• 2001

There are many people who suffer from simulation sickness when immersing in virtual reality. In this study, we analyzed two photoplethysmogram(PPG) parameters - a second derivative parameter and power spectral density ratios - in order to relate PPG parameters with simulation sickness. 36 young, healthy subjects were participated in the experiment, and each subject was equipped with a PPG electrode during his or her immersion. Simulation sickness section was defined as a 7 - second section which starts from the point where a subject reported simulation sickness, and normal section as a same-length section where no physical stimuli was presented to him or her. We compared the PPG parameters of the simulation sickness sections with the normal sections, - d/a ratio is believed to have lower value during vasodilation and higher value during vasoconstriction, however, we could not find much difference in the parameter between normal and simulation sickness sections. We also compared 1 to 10Hz power spectral density ratios in normal sections with in simulation sickness section, and found that 6 density ratios among them have different value. Therefore, the density ratios might be utilized as parameters to detect simulation sickness of subjects.