• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(5)
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• pp.199-202
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• 2001

In this paper, we propose new method of signal processing for the Pulse Oximeter for resistant motion artifact. When measure Oxygen saturation, today Pulse Oximeter is low reality because of patient moving, and it low difficult to filtering because of overlap Oxygen saturation and motion artifact. For we measure high reality Oxygen saturation, we reduces motion artifact. In this paper, we Propose and simulate method of signal processing for the Pulse Oximeter for resistant motion artifact.

• 대한소아치과학회지
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• 제27권4호
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• pp.494-498
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• 2000

진정요법하의 치과진료에서 환자의 상태를 지속적으로 감시하는 것은 매우 중요하다. 여러 방법 중 가장 널리 사용되는 것 중 Pulse Oximeter가 있다. Pulse Oximeter는 비침습적 방법으로 계속해서 동맥혈액의 산소포화도를 측정할 수 있도록 고안된 장치로서 기기에 나타나는 산소포화도$(SpO_2)$는 실제로 측정한 동맥혈액의 산소포화도$(SaO_2)$와 거의 일치하는 것으로 알려져 있다. 본 진료실에 있는 세종류의 Pulse Oximeter를 이용하여 한 환자에게 동시에 두 개의 기기를 적용하였을 경우, 산출값을 상호 비교한 결과, 짧은(3회) 맥박수를 평균하는 기기가 낮은값이 나왔으며, 다른 두개의 Pulse Oximeter와 유의한 차이가 있는 것으로 밝혀졌다. 짧은 맥박수를 평균하는 기기는 반응이 빠르나, 산소포화도의 값이 작게 산출되고, 외부의 신호에 더욱 민감하여, 오류가 존재할 가능성 또한 높다. 기기의 특성을 알아, 술자는 적절한 기기를 선택하는 것이 중요하다.

• 한국응급구조학회지
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• 제28권1호
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• pp.35-46
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• 2024

Purpose: This study aimed to compare the oxygen saturation measured at fingertips with unpolished and self-artificial nails (sticker, tip) using a portable pulse oximeter. Methods: The sample comprised 27 women who had used nail care services. Using a pulse oximeter, oxygen saturation was measured at fingertips with unpolished nails in a stable state. Self-fabricated sticker and tip nails were attached to the right and left hands, respectively, using five nail colors (black, blue, green, purple, and brown). Oxygen saturation was measured at fingertips with self-fabricated nails first in the usual manner and then measured again by rotating the oximeter by 90°. Values of oxygen saturation were compared and analyzed using the Friedman test and Wilcoxon signed-rank test with Bonferroni correction using IBM SPSS 26.0. Results: Oxygen saturation values were significantly different among colors for both sticker nails (p=.036) and tip nails (p=.000), with black self-artificial nails tending to demonstrate lower oxygen saturation. Moreover, oxygen saturation values obtained by measuring the usual way on unpolished nails was significantly different than those obtained by rotating the oximeter by 90° on thumb with sticker (p=.001) and tip nails (p=.001). Conclusion: The findings of this study suggest that oxygen saturation should be measured on other fingers except for thumb instead of removing the self-artificial nails in emergency situations. For patients with black self-artificial nails, is the findings recommend measuring oxygen saturation at other body parts such as toes, earlobes, forehead, etc.

• 산업기술연구
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• 제26권A호
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• pp.89-93
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• 2006

Pulse oximetry, which monitors non-invasively the oxygen saturation in blood, is influenced by patient's respiration, movement or a factor of an environment. Specially, it's difficult to measure a PPG (Photoplethsmography) signal from the moving patient because of the motion artifact. Accordingly, it is required to extract the pure PPG signal from the PPG signal to measure oxygen saturation. In this paper, we propose an adaptive noise canceller to improve the performance of motion artifact removal. Then we design a hardware system for real time monitoring of the oxygen saturation. The proposed algorithm estimates the slope of transition rate between two different wavelength signals.

• 대한물리치료과학회지
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• 제10권1호
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• pp.38-46
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• 2003

Since the current tendencies show us the increasing number of cerebral palsy children and the standard longevity, we need to find out more research about the following various problems. Therefore I have tried to figure out the difference of oxygen saturation and heart rate between before ambulation and after. Objects chosen are 17 C.P children on the process of treatment those who were able to walk and 8 normal children in Ah-San hospital, Gang-Nung. They haven't had either any operation or suffered heart disease and I measured their oxygen saturation and heart rate by using pulse-oximeter and are analyzed by SPSS (10.07 version). Results are the followings; 1. There was no difference of oxygen saturation and heart rate between pre-ambulation and post-ambulation of normal and spastic hemiplegia children. 2. There showed the significant statistic difference of oxygen saturation, heart rate between pre-ambulates and post-ambulation of normal and spastic diplegia(p<.05). 3. There was no difference of oxygen saturation, heart rate in C.P between(p>.05), but shows the significant statistic difference in heart rate(p<.05). As I compared the oxygen saturation and heart rate of spastic and normal children on between pre-ambulation and post-ambulation, theres is significant statistic difference on both items (p<.05). However there was no difference of oxygen saturation among hemiplegia, normal and diplegia children while the pulse rate showed the significant difference(p<.05). According to this clinical research, CP children's oxygen saturation and heart rate had no change between pre and post compared to normal children. But there was difference in diplegia. This is why we need to invest time to study these kinds of research about various analysis and comparison of oxygen saturation and heart rate, and furthermore making use of pulse-oxymetry in physical therapy room for the children involved would be beneficial to calculate in accuracy without any discomfort for the patient as well.

• International Journal of Advanced Culture Technology
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• 제8권4호
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• pp.95-100
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• 2020

Recently, the problem of hypoxia caused by jogging is attracting attention. To solve this problem, this paper proposed a new solution. This paper proved that as a vocalization method of reading aloud, it is possible to increase air intake and activate lung function to exchange more air and obtain more oxygen. Then, blood oxygen saturation was used as an evaluation index for the body's oxygen content level to prove its effectiveness. A photoelectric pulse oximeter developed on the basis of different light absorption principles in blood was used to test blood oxygen saturation. Experimental results show that a certain degree of hypoxia is induced when a lot of oxygen is required due to jogging. Therefore, it was proved that the new vocal breathing method by reading books can increase the blood oxygen saturation of the body and improve the hypoxia of the body. Reading vocal breathing is a simple and efficient oxygen saturation recovery breathing method.

• 대한소아치과학회지
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• 제35권1호
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• pp.65-72
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• 2008

소아환자의 진정법시 사용되는 환자감시 기구 중 하나인 pulse oximeter는 산소포화도를 감시하여 조기에 저산소혈증을 발견하는데 유용하게 이용된다. 이 연구의 목적은 진정법을 시행하지 않은 소아환자에서 pulse oximeter(pulse oximeter7845, Kontron Instrument Ltd., England)를 이용하여 일상적인 수복치료시 치료단계에 따른 심박동과 동맥혈 산소포화도의 양상이 어떻게 나타나는지 알아보고자 한다. 전북대학교병원 소아치과에 내원한 53명의 어린이를 대상으로 치료전 3분과 치료후 3분을 포함하여 수복치료 단계별로 심박동과 동맥혈 산소포화도가 기록되었고, 기록된 수치를 바탕으로 다음의 결과를 얻었다. 1. 비마취군에서 상, 하악 치료군 간 심박동 변화를 비교시 상악의 경우 러버댐 장착시 심박동이 급격히 증가한데 비해 하악치료군에서는 와동 형성시 심박동이 크게 증가하였다. 2. 마취군에서 상, 하악 심박동 변화를 비교시 상악치료군에서는 러버댐 장착을 기점으로 심박동이 감소되는 양상을 보인 반면, 하악 치료군은 와동형성시점부터 심박동이 감소되었다. 3. 비마취군에서 상, 하악 치료군 간 동맥혈 산소포화도를 비교하였을 때 상악 치료군은 치료 전부터 치료 후까지 비교적 일정한 값을 나타내며 모든 단계에서 하악보다 약간 높은 값을 보인 반면, 하악 치료군은 러버댐 장착시 증가하여 유지되다가 치료 후 다시 치료 전 수준과 유사하게 감소하는 양상을 보였다. 4. 마취군에서는 모든 단계에서 동맥혈 산소포화도 값이 99% 수준에 머물고 있으며, 상악과 하악 치료군 사이에 유의한 차이는 존재하지 않았다(p>0.05).

• Clinical and Experimental Pediatrics
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• 제54권9호
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• pp.359-362
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• 2011

There is a delicate balance between too little and too much supplemental oxygen exposure in premature infants. Since underuse and overuse of supplemental oxygen can harm premature infants, oxygen saturation levels must be monitored and kept at less than 95% to prevent reactive oxygen species-related diseases, such as retinopathy of prematurity and bronchopulmonary dysplasia. At the same time, desaturation below 80 to 85% must be avoided to prevent adverse consequences, such as cerebral palsy. It is still unclear what range of oxygen saturation is appropriate for premature infants; however, until the results of further studies are available, a reasonable target for pulse oxygen saturation ($SpO_2$) is 90 to 93% with an intermittent review of the correlation between $SpO_2$ and the partial pressure of arterial oxygen tension ($PaO_2$). Because optimal oxygenation depends on individuals at the bedside making ongoing adjustments, each unit must define an optimal target range and set alarm limits according to their own equipment or conditions. All staff must be aware of these values and adjust the concentration of supplemental oxygen frequently.

• 정보처리학회논문지B
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• 제14B권6호
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• pp.431-436
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• 2007

자기공명영상(Magnetic Resonance Imaging:MRI)은 물과 지방 사이에 화학적 이동 현상을 가지고 있고 지방에 의해 구조적 현상이 나타난다. 또한 지방은 기본적으로 강한 신호를 가지고 있어 잘못된 인공물을 형성한다. 그래서 지방소거(fat suppression)에 대해 연구하고자 한다. MRI에서 지방소거(fat suppression)방법만을 사용하여 진단하는데 약간의 어려움은 있지만 기본은 화학적 이동 선택 포화(chemical shift selective saturation : CHESS) pulse 방법을 이용하여 물과 지방 phantom을 가지고 지방소거(fat suppression)를 연구하는데 목적이 있다. 본 연구에서 CHESS pulse를 matlap 프로그램을 이용 Map pulse로 알맞게 design하고 Pre saturation을 하기 위한 pulse diagram이 가능하였고, fat phantom과 water phantom을 실험하여 지방소거 기법(fat saturation)의 효과를 볼 수가 있었으며 임상 적용 부위로 경추(C-SPINE), 요추(L-SPINE), 가습(BREAST)에 적용하여 의료영상진단에 있어 화학적 이동 선택 포화 CHESS pulse의 지방소거(fat suppression)는 유용한 방법임을 증명하였다.(충남대학병원 G.E 1.5T MR를 이용하여 실험하였다.)

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1993년도 춘계학술대회
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• pp.116-119
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• 1993

In this paper, we implemented a pulse wave type oximeter system that continuously measure the of oxyhemoglobin saturation of the arterial blood(SaO2) and pulse rate with non-invasively. We use the transmission type and reflection type transducer for comparison the percentage of hemoglobin oxgen saturation. The light Iron the two kind of LEDs is transmitted through the tissue, then received by a single photodiode with alternatively. By the phase sensitive detection circuit, the output of the photodiode is separated in to red and near infrared signal. We calculated a ratio of light transmittance between two kind of LEDs, and then, it is applied to the oxgen saturation coefficent calculation formular.