• 반도체디스플레이기술학회지
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• 제12권2호
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• pp.73-78
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• 2013

This paper proposes a portable electrocardiograph and smart device-based heart health monitoring and risk notification system. The proposed system consists of a portable electrocardiograph and a smart device for a system user, and a web-based monitoring system for observers. This system can improve the convenience and efficiency of measurement by using a light-weight portable electrocardiograph and a smart device. In addition, any authorized person such as caregiver or family member who is not related to medical institution can monitor users'heart health in real-time using the web-based monitoring system. Therefore, a user and authorized remote observers can efficiently monitor and manage user's heart health in daily-life even without any medical institution's help, and can preemptively deal with any possible dangerous situations, such as degeneration of a cardiac disorder and sudden cardiac death.

• 대한의용생체공학회:의공학회지
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• 제35권5호
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• pp.111-118
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• 2014

As assessment of quantitative energy expenditure for effective exercise is becoming more important, many researches about the monitoring system for exercise status or result have been actively carried out. In this case, however, bicycle riders feel restrained and uncomfortable because the riders should wear a belt-type electrocardiograph or a watch-type accelerometer or GPS system during the assessment of bicycle exercise. In this study, therefore, an electrocardiograph based on textile electrode was developed for measuring ECG and calculating heart rate from the bicycle rider without feeling restraint, and smartphone application was also developed for monitoring the heart rate.

• 한국간호교육학회지
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• 제20권1호
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• pp.60-70
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• 2014

Purpose: Bedside electrocardiograph (ECG) monitoring is continuously used for assessing patients' cardiac status in intensive care units. However, it has not been explored whether it is used with proper knowledge and nursing practices; if not, its usage will be limited and the risk for compromised patient safety might be significant. This study, therefore, explored knowledge and nursing practices regarding bedside ECG monitoring in nurses working at intensive care units. Methods: Participants in this survey research were a convenience sample of 156 nurses from 25 intensive care units distributed in five hospitals with more than 1,000 beds each in Seoul, South Korea. Results: Participants showed limited and incorrect knowledge and nursing practices. Only 4 (2.6%) participants correctly answered to all electrode placement sites of RA, LA, LL, and V1. Lead II was the most frequently monitored unit regardless of the main purpose of ECG monitoring, and nursing practices to manage noisy signals did not include skin care at the top priorities. Conclusion: Educators and clinicians alike need to make an effort to ensure that a safe level of knowledge and practices for the monitoring is maintained in order to make sure that patient outcomes are not compromised.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제11권3호
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• pp.204-210
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• 2011

This paper proposes a fuzzy support vector machine ($FSVM_n$) pattern classifier to classify the arrhythmia patterns of an electrocardiograph (ECG). The $FSVM_n$ is a pattern classifier which combines n-dimensional fuzzy membership functions with a slack variable of SVM. To evaluate the performance of the proposed classifier, the MIT/BIH ECG database, which is a standard database for evaluating arrhythmia detection, was used. The pattern classification experiment showed that, when classifying ECG into four patterns - NSR, VT, VF, and NSR, VT, and VF classification rate resulted in 99.42%, 99.00%, and 99.79%, respectively. As a result, the $FSVM_n$ shows better pattern classification performance than the existing SVM and FSVM algorithms.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1997년도 추계학술대회
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• pp.411-414
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• 1997

This paper describes the design guideline, methodology and general specification of the developed 12 channel interpretive electrocardiograph. The developed 12 channel electrocardiograph consists of main module, patient module, DSP module, interface module, power/battery module, TFT color LCD and thermal recorder. The control panel of the system has full keyboard, rotate/push button, function key and unctional indicators. The graphic user interface program conveniently allows user to record, setup, store, manage ECGs. A variety of system configurations give it ability to make user favorable environment. This system also has a resting adult's ECG analysis program. The developed system and program will be continusely evolved using a database of clinically correlated ECGs.

• 한국자기학회지
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• 제23권4호
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• pp.135-143
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• 2013

요골 동맥의 중앙 부에 위치 한 "관"이란 곳에 영구자석 부착하여 맥의 움직임에 따라 발생하는 자기장의 변화를 홀센서로 정량화하여 맥진파형을 측정하는 집게형 맥진기를 개발하였다. 홀소자 맥진센서로 얻어진 전기적 신호로 심전도와 용적맥파계를 사용해 동시에 측정된 맥박수, 비침습적 혈압, 호흡수, 맥파전달속도와 공간맥파전달속도를 환자감시장치에 디스플레이하였다. 개발된 장치는 한방과 양방의 의료용 저장 매체와 새롭게 시도되거나 융합되어지고 있는 환자감시 장비 및 유비쿼터스 헬스케어 시스템 개발에 도움이 될 것이다.

• 대한의용생체공학회:의공학회지
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• 제2권2호
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• pp.117-126
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• 1981

Patient monitoring system, which is one of widly used medical electronic equipment in clinics, is developed. This prototype bedside monitor is considered that can measure electrocardiograph, photoplethysmograph, heart rate, respiratory, body temperature, and etc. Some clinical tests are performed and considered with its usefulness for patient monitoring items.

• 한국산학기술학회논문지
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• 제9권5호
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• pp.1130-1133
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• 2008

본 논문에서는 일반 9V 알카라인 배터리로 동작하는 초소형 심전도계를 설계 및 구현하였다. 제작된 심전도계는 심장신호를 검출하고 증폭하기 위한 계측 증폭단, 고역통과필터, 저역통과필터, 미분회로 및 피크검출기로 구성하였다. 세 개의 전극을 통해 검출된 심장신호는 오실로스코프 상에 깨끗한 파형으로 표현되었으며, 이를 통해 완성된 심전도계가 정상적으로 잘 동작함을 알 수 있었다. 제작된 심전도계는 감지된 심장신호를 디지털 데이터화하여 소형 LCD에 디스플레이함으로써 측정의 간편성 및 휴대성을 크게 개선할 수 있으며, 따라서 누구나, 언제, 어디서든 본인의 심장 상태를 쉽고 간편하게 체크할 수 있을 것이다.

• 한국군사과학기술학회지
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• 제14권6호
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• pp.1159-1165
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• 2011

Telemetry techniques of rats have been used for assessing safety pharmacology of drugs and chemicals. Biological signals including blood pressure and heart rate measured under anesthesia were significantly different from those obtained under normal conditions. The stress of restraint in awake animals can also affect the accuracy of physiological evaluation. This paper details the surgery required to allow key cardiovascular parameters to be determined. The telemetric measurement of cardiovascular parameters such as blood pressure, heart rate, electrocardiograph(ECG) established. We carried out the continuous monitoring of cardiovascular parameters using the telemetry system in F344 rats. During the measurement, no significant changes were observed in the heart rate and blood pressure. ECG signals and body temperature were also constant during the measurement of biological signals. With the results of this study, we conclude that this telemetry system can be applied usefully for the assesment of biological parameters in the rats.

• 대한의용생체공학회:의공학회지
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• 제21권4호
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• pp.345-351
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• 2000

본 연구는 심전신호와 부가정보 신호의 다중신호를 주파수분할 다중방식과 주파수변조에 의해 무선전송하기 위함이다. 심전신호는 전극으로부터 유도되고 아날로그 증폭기에 의해 증폭된다. 전극 전착부실, 간호사 호출 및 저전압 배터리 신호의 부가정보 신호는 서로 주파수가 중복되지 않도록 발진되고 주파수분할 다중방식에 의해 합성되어 주파수 변조된다. 주파수 변조된 신호는 콜피츠회로에 의해 발진된 기본 반송파로 주파수 변조되고 체배되어 송신 반송주파수로 변환된다. 수신된 신호는 슈퍼헤테로다인 방식에 의해 중간주파수로 변환되고 쿼드래처 복조기에 의해 주파수 변조된 신호는 복조된다. 펄스카운터와 저역통과필터에 의해 심전신호와 부가정보 신호들은 복조된다.