• Journal of fish pathology
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• v.8 no.2
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• pp.157-164
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• 1995

In order to examine the effects of $O_2$ saturation and pH on gas-bubble disease of blue crab, portunus trituberculatus, zoeal larvae were reared under 5 different concentrations (6.0, 4.0, 3.1, 2.2, and 0.7million cell/cc) of Chlamydomones sp. under natural light for 4days. Observed pH and $O_2$ saturation in the rearing chamber increased drastically from 12 to 18 o'clock with the increasing of Chlamydomones sp. concentrations, but rapidly decreased from 2 to 6 o'clock in the rearing chamber. Gas-bubble disease of zoeal larvae was observed 4hours after starting of experiment at the pH 8.5 and 118% $O_2$ saturated conditions in rearing chamber during the day, and recovered rapidly with the decreasing of pH and $O_2$ saturation at night. Thus, gas-bubble disease of zoeal larvae was repeated with the increased pH($\geq$8.5) and $O_2$ saturation ($\geq$118%) almost every days. Mortality of zoeal larvae was observed when pH and $O_2$ saturations were reached 8.5 and 118% levels respectively, and deteriorated with the increasing of water temperature, pH and $O_2$ saturation.

• Journal of Digital Contents Society
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• v.11 no.2
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• pp.277-282
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• 2010

In this paper, the wireless transmission module is developed to transmit oxygen saturation(SpO2) signal, acquired from bio-signal measuring module, to PC. This wireless transmission module is designed with closed type protocol instead of open type protocol such as a zigbee or a bluetooth, considering of the security of personal medical informations. The display software is also developed to display transmitted SpO2 signals by various type data and graph without information loss for a emergency transfer.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.3
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• pp.575-583
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• 2000

Pulse oximetry is a well established non-invasive optical technique for monitoring the $SpO_2$ during anaesthesia, recovery and intensive care. Pulse oximeters determine the oxygen saturation level of blood by measuring the light absorption of arterial blood. In the measurement of the hemoglobin oxygen saturation, conventional method has required the technique of filtering of remove the noise, and of complex signal processing algorithm. So much time have been required to signal processing. In this research, we separate AC signal and DC signal in the stage of signal detection. Therefore we simplify the calculation algorithm for $SpO_2$. The implemented system have the high performance such an accuracy and a processing time than the traditional method.

• The Journal of the Korea institute of electronic communication sciences
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• v.6 no.6
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• pp.981-986
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• 2011

In this paper, the module for measuring SpO2 and PPG(Photo Plethysmo Graphy) signal of human body and the module for wireless communication of these bio-signals to PC were developed. The program was developed to display transmitted SpO2 and PPG signal by various type data and graph without information loss during a emergency transfer. This system can be utilized as appropriate for remote medical care and a new market is expected, to be created according to revision of medical law.

• Proceedings of the Korean Society of Computer Information Conference
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• 2010.07a
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• pp.39-42
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• 2010

본 연구에서는 두 파장을 이용한 광적용적맥파(photoelectric plethysmography, PPG)의 시스템을 기반으로 산소포화도 및 다양한 맥파 관련 건강정보를 분석할 수 있는 시스템에 관하여 연구하였다. 광적용적맥파를 이용한 산소포화도 측정을 위해 서로 다른 두 파장의 빛을 이용하여 비 침습적 맥파 측정 방식으로 손가락 끝 부분에서 측정하고, 혈액 내 헤모글로빈의 빛 대한 광흡수도의 차이를 분석하여 검출하였다. 또한 정확한 분석을 위하여 두 파장의 빛을 순차적으로 제어하는 스위칭 기법을 사용하고, 조직을 통과한 두 파장의 빛을 분리하기 위하여 수광부에 시간의 차이를 두어 각 파장에 대한 광전용적맥파를 측정하였다. 본 연구에서는 산소포화도를 측정하기 위한 방법으로 서로 다른 두 파장을 이용한 광전용적맥파 측정기기를 설계하고, 측정 결과의 정확성 및 유의성에 대한 검증하였다.

• Journal of Naturopathy
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• v.11 no.2
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• pp.116-122
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• 2022

Background: Studies on the effect of abdominal or thoracic breathing therapy on sleep or blood oxygen concentration are still scarce. Purpose: This study was to examine the effect on blood oxygen saturation and pulse variability, changes in the severity of insomnia, changes in wakefulness before sleep, and dysfunctional beliefs and attitudes toward the Korean version of sleep in women in their 50s after healing with abdominal breathing and thoracic breathing. We investigated the effect. Methods: Subjects were investigated before and after the change of breathing (breathing) therapy for 12 weeks, 3 times a week, and 36 breaths perweek. Results: It wa evaluated respiratory healing as having no significance in the pulse rate change. However, oxygen saturation was significant in the experimental group, increasing to 93.60 SpO₂% before the respiratory rally and 96.5 SpO₂% after respiratory recovery (p < .002). In addition, the insomnia severity scale and dysfunctional beliefs about sleep significantly decreased after respiratory rally than before (p < .000). Conclusions: It evaluated that respiratory therapy for the subjects is beneficial to health as it is effective for insomnia, pulse, and oxygen saturation.

• Journal of the Korea Society of Computer and Information
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• v.27 no.11
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• pp.191-198
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• 2022

The most basic thing to measure the condition of a companion animal is to check the breathing and pulse. There are several methods to measure the breathing and pulse of a companion animal, and the PPG method is generally used to measure the oxygen saturation (SpO₂) in a companion animal. However, since the input PPG signal is inputted with various information as well as oxygen saturation, it is necessary to separate and extract oxygen saturation information from the PPG signal in order to measure the oxygen saturation. Therefore, in this paper, a wearable measuring device for companion animals that can be measured by applying the PPG method was designed and implemented, and an algorithm for separating oxygen saturation information from the PPG signal input through the wearable measuring device was proposed.

• Proceedings of the Korean Nuclear Society Conference
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• 1996.11a
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• pp.140-144
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• 1996

Trickle bed를 이용하여 고분가 촉매에 의한 용존산소 제거반응을 수행하였다. 고분자 촉매는 폴리스티렌-디비닐 벤젠의 공중합체로 이루어진 담체를 제조하여 백금 용액을 함침시킨 후 수소로 환원하여 제조하였다. trickle bed는 수소 및 산소로 포화되어 있는 물을 향류식으로 접촉할 수 있도록 설계하였다. 이 경우는 액상 실험 장치와 달리 포화기가 없기 때문에 장치는 비교적 단순하였으나 컬럼내에 축적되는 액상의 축적이 중요한 운전변수로 나타났다. trickle bed에서의 용존산소 제거 거동을 semi-empirical relation으로 나타내어 실험치와 비교한 결과 예측된 모델과 매우 잘 일치하는 것으로 나타났다.

• Journal of the korean academy of Pediatric Dentistry
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• v.27 no.4
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• pp.494-498
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• 2000

A major concern in pediatric dentistry is maximizing risk management through optimal monitoring of respiratory function during sedation techniques, and Pulse Oximeter is one of the most popular devices for these purpose. Pulse Oximeter is non-invasive device for detecting the sensitive fraction between the saturated & desaturated hemoglobin. Several Studies proved that there is no significant difference between the $SpO_2$ and $SaO_2$. In this article, We examined three Pulse Oximeter $(3300MX^{(R)},\;OX90^{(R)},\;BPM200^{(R)})$. The Pulse Oximeter using shorter pulse beat averaging showed more sensitive reaction to the statue of the patient and lower saturation data. We compared pair of Pulse Oximeter applied to one patient at one time. and $BPM200^{(R)}$(using shorter pulse beat averaging) showed statistically low saturation.

• Neonatal Medicine
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• v.17 no.2
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• pp.193-200
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• 2010

Purpose: Feeding desaturation is a common problem among preterm infants which can result in prolonged hospital stays, longterm feeding difficulties and growth delay. The purpose of this study was to identify the characteristics of premature infants with feeding desaturation and to examine the effect of orocutaneous stimulation on oral feeding. Methods: During the first phase of this study, 125 extremely low birth weight infants were reviewed retrospectively. Characteristics between infants with feeding desaturation (n=34) and those without feeding desaturation (n=91) were examined. During the second phase, 29 infants recruited from March, 2009 to May, 2010 were subjected to orocutaneous stimulation. The results of orocutaneous stimulation were compared to a control group (n=81). Results: The first phase of the study revealed that extremely low birth weight infants with feeding desaturation were significantly lower in gestational ages at birth, and had lower 5 minute apgar scores, more gastroesophageal refluxes and bronchopulmonary dysplasia. Infants without feeding desaturation reached full enteral feeding significantly earlier and showed shorter duration of hospital stay. At the second phase, infants in the intervention group showed shorter days to achieve initiation of bottle feeding, shorter days in achievement of full bottle feeding, last episodes of feeding desaturation and length of hospital stay compared to the control group of similar characteristics. Conclusion: Orocutaneous stimulation among extremely low birth weight infants results in earlier achievement of full bottle feedings without episodes of feeding desaturation hence shortens the length of hospital stay.