• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2003.11a
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• pp.71-73
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• 2003

본 연구에서는 안정 상태에서 일반 공기 중에 산소 농도(21％) 환경에 비해 외부에서 고 농도(35％)의 산소 공급이 혈중 산소 포화도(SPO2), 심박동율(Heart rate), 피부전도도(Galvanic skin response)에 어떠한 영향을 미치는지를 검증하고자 한다. 35％의 고농도 산소를 2L/min의 양으로 일정하게 공급할 수 있는 산소 공급 장치를 이용하였고, 뇌 질병이 없는 5명의 대학생들이 피험자로 참여하였다. 21％의 비해 35％ 산소 농도에서 모든 실험 참여자의 3분 동안의 평균 심박동율은 감소하였고 평균 혈중 산소 포화도는 증가하였다. 그러나 피부전도도는 차이가 없었다.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2004.11a
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• pp.37-37
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• 2004

• Science of Emotion and Sensibility
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• v.9 no.1
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• pp.1-7
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• 2006

The purpose of this study is to analyze the effects of the inhalation of 30% oxygen on heart rate and oxygen saturation ($SPO_2$) during cycle isokinetic exercise, in comparison with the inhalation of 21% oxygen. This study used oxygen supply equipment that can supply each of 21% and 30% oxygen constantly at a rate of 8 liter/min. Ten healthy male college students ($25.2{\pm}2.2$ years) participated in the experiment twice, one for 21% oxygen and the other for 30% oxygen. Each experiment was composed of three sections (a total of 18 minutes), which were composure (2 minutes), cycle isokinetic exercise at a speed of $20{\pm}1km/h$ (10 minutes) and recovery (6 minutes). 21% or 30% oxygen was supplied only during the sections of isokinetic exercise and restoration. Heart rate during isokinetic exercise and recovery was lower with the inhalation of 30% oxygen than with that of 20% oxygen but no difference was observed in $SPO_2$. $SPO_2$ was not different possibly because the same work load was applied to the group of 21% oxygen and that of 30% oxygen. Heart rate was reduced with the inhalation of 30% oxygen possibly because a larger quantity of oxygen was supplied at the same work load.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2004.05a
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• pp.300-300
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• 2004

본 연구에서는 언어과제 수행 시 일반 공기 중의 산소 농도 (21%) 환경에 비해 외부에서 고 농도 (30%)의 산소 공급이 혈중 산소 포화도(SPO$_2$), 심박동율(Heart Rate), 정답률(Accuracy), 반응속도(Reaction Time)에 어떠한 영향을 미치는지를 검증하고자 한다. 30%와 21%의 산소를 8L/min의 양으로 일정하게 공급할 수 있는 산소 공급 장치를 이용하였고, 10명의 대학생(오른손잡이, 평균나이 23.4세)을 대상으로 실험을 수행하였다. 난이도가 비슷한 두 가지 언어과제를 28문제씩 피험자에게 풀게하여 정답률과 반응속도를 계산하였다.(중략)

• Korean Journal of Cognitive Science
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• v.16 no.3
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• pp.189-197
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• 2005

In this study, changes in performance of 2-back task, blood oxygen saturation and heart rate due to $40\%$ concentration oxygen supply were observed. Five male $(25.8\pm1.3)$ and five female $(23.0\pm1.0)$ college students were nked to perform 2-bark task during two types of oxygen (concentration $21\%,\;40\%$) administration. The experimental sequence consisted of Rest1(1 min.), 0-back Task (1 min.), 2-bark Task (2 min.), and Rest2 (4 min.) and the physiological signals such as blood oxygen saturation and heart rate were measured throughout the stages. The experimental result showed that the performance increased significantly at $40\%'s$ concentration of oxygen rather than $21\%'s$, which shows oxygen supply has positive influence on cognitive performance. When $40\%$ concentration oxygen is supplied, the oxygen saturation in the blood increased and heart rate was decreased significantly comparing to $21\%$. It is Suggested that $40\%$ oxygen can stimulate brain activation bY increasing actual blood oxygen concentration in the process of cognitive performance, and hyperoxia makes heart rate decrease.

• Science of Emotion and Sensibility
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• v.11 no.1
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• pp.105-112
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• 2008

This study investigated the effect of 40% oxygen administration on the addition task performance in three levels of difficulties and physiological signals. Ten male and female college students were selected as the subjects for this study. The experiment consisted of two runs: one was a addition task, with normal air (21% oxygen) administered and the other was with hyperoxic air (40% oxygen) administered. The experimental sequence in each run consisted of Rest1 (3 min), Task1 (1 min, one digit addition task), Task2 (1 min, two digit addition task), Task3 (1 min, three digit addition task), and Rest2 (4 min). Blood oxygen saturation and heart rate were measured throughout the five phases. The accuracy rates of the addition task were enhanced with 40% oxygen administration compared to 21% oxygen. Difference in the accuracy rates grew higher with the rise of difficulty. When 40% concentration oxygen is supplied, blood oxygen saturation increased and heart rate was decreased comparing to 21%. This study showed that the supply of high concentration oxygen increases blood oxygen saturation, which in turns accelerates brain activation resulting from cognitive process and enhances arithmetic abilities. Particularly when difficulty is high, demand for oxygen increases and, as a result, the effect of high concentration oxygen becomes more significant.

• The Journal of the Korea institute of electronic communication sciences
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• v.7 no.4
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• pp.931-936
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• 2012

In this paper, the module which can measure body fat, heart rate and $SpO_2$ has been developed for being mounted on widespread bidets in the home. This moudule was manufactured by a structure that can be mounted on a bidet, users such as elderly, patients with chronic fatigue, heart disease and overworked workers checking their health status in every life through monitoring their body fat, heart rate and $SpO_2$ and preventing of sudden death.

• Journal of the korean academy of Pediatric Dentistry
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• v.35 no.1
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• pp.65-72
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• 2008

Pulse oximeter to monitor oxygen saturation during pediatric dental sedations enables early detection of hypoxemia. The purpose of this study was to monitor the hemoglobin oxygen saturation level and pulse rate of nonmedicated pediatric patients during routine restorative procedures to study the effect of procedure and treated jaw. We obtained data from 53 children treated at the Department of Pediatric Dentistry, Chonbuk national university hospital. Pulse rate and oxygen saturation were measured and recorded using pulse oximetry at each step of treatment. The results are as follows: 1. In non-anesthesia group, steep increase of pulse rate was observed during rubber dam application in the maxilla and during cavity preparation in the mandible. 2. In anesthesia group, pulse rate started to decrease after the rubber dam application in the maxilla, while its decrease observed since cavity preparation step in the mandible. 3. In non-anesthesia group, oxygen saturation level was relatively constant during all steps in the maxilla, but in mandible, it was higher during operation compared to its pre and post operation baseline. 4. In anesthesia group, oxygen saturation level was observed at 99% level through all steps in both jaw groups, and there was no statistical significance between the maxilla and the mandible groups(p>0.05). The purpose of this study was to evaluate the effect of routine dental treatment on the pulse rate and oxygen saturation level in nonmedicated pediatric patients during routine restorative procedures in the maxilla and mandible.

• The Journal of the Convergence on Culture Technology
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• v.7 no.1
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• pp.576-581
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• 2021

In the post-epidemic era, COVID-19 has not yet been fully controlled. Wearing masks is still the main means of epidemic prevention, and the negative effects brought by masks continue to continue. Wearing a mask for a long time can cause two problems. The first problem is hypoxia, and the other is an increase in psychological stress. To reduce the negative impact of masks, this paper proposes a new breathing mode. It is the "Umm~" vocal breathing mode, which simultaneously solves the two problems of hypoxia and increased stress. This paper explores the reasons why new breathing patterns can relieve stress. Explains the relationship between HRV and stress index and uses SDNN as an indicator to detect stress index to confirm the effectiveness of this breathing pattern. Experimental results prove that the "Umm~" vocal breathing mode can not only relieve the stress induced by wearing a mask. And when not wearing a mask, it can also be used to relieve daily stress. This method that anyone can easily implement should be more popularized.

• Child Health Nursing Research
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• v.13 no.3
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• pp.299-307
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• 2007

Purpose: To investigate the effect of nonnutritive sucking(NNS) on the heart rate, oxygen saturation, and behavioral state of premature infants. Method: From December 15, 2004 to February 15, 2005, 20 premature infants hospitalized in the neonatal intensive care units were assigned to an experimental group (10), or a control group (10). Circular pacifiers for premature infants (Johnson, U.S.A.), which had been packed with $2{\times}2$ gauzes to create a vacuum, were used for 5 minutes, one hour after feeding for 5 days. Heart rates and oxygen saturation were checked every minute for 10 minutes once a day and behavioral states were monitored through video recording at the same time. Results: Changes in heart rate, oxygen saturation and behavioral state were found to show significant differences between the experimental group and the control group according to the point in time, and interactions were found between the group and the point of time. However, for behavioral state, no significant difference was found between the experimental group and the control group after the NNS was removed. Conclusion: From the results of this study it is possible to conclude that NNS is a positive intervention to bring about increased oxygen saturation and soothed behavioral state for premature infants.