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1.
Chinese Journal of Medical Instrumentation ; (6): 1-5, 2021.
Article Dans Chinois | WPRIM | ID: wpr-880412

Résumé

The ECG signal is susceptible to interference from the external environment during the acquisition process, affecting the analysis and processing of the ECG signal. After the traditional soft-hard threshold function is processed, there is a defect that the signal quality is not high and the continuity at the threshold is poor. An improved threshold function wavelet denoising is proposed, which has better regulation and continuity, and effectively solves the shortcomings of traditional soft and hard threshold functions. The Matlab simulation is carried out through a large amount of data, and various processing methods are compared. The results show that the improved threshold function can improve the denoising effect and is superior to the traditional soft and hard threshold denoising.


Sujets)
Algorithmes , Simulation numérique , Électrocardiographie , Traitement du signal assisté par ordinateur , Analyse en ondelettes
2.
Chinese Journal of Medical Instrumentation ; (6): 311-314, 2020.
Article Dans Chinois | WPRIM | ID: wpr-828198

Résumé

This paper describes how to develop a practical new type of atherosclerosis detection device, which can realize real-time measurement and analysis of human atherosclerosis. According to the mechanism of human atherosclerosis, the design objectives of the system are formulated to determine the construction of the platform. The system calculates the pulse wave velocity by measuring the pulse wave of human fingers and toes, adds four blood pressure measurements to the system design, calculates the ankle-brachial index, and comprehensively measures and analyses the degree of human arteriosclerosis.


Sujets)
Humains , Cheville , Athérosclérose , Vitesse du flux sanguin , Pression sanguine , Artère brachiale , Analyse de l'onde de pouls
3.
Chinese Journal of Medical Instrumentation ; (6): 136-140, 2020.
Article Dans Chinois | WPRIM | ID: wpr-942715

Résumé

In order to comprehensively evaluate the human body's functions of breathing, heart function and circulation metabolism under controlled conditions to diagnose respiratory and cardiac functions, a cardiopulmonary exercise test (CPET) system was developed. The system is divided into two parts:hardware and software. The hardware part includes measurement of six life information monitoring signals such as 12-lead ECG, respiratory mechanics, blood pressure, blood oxygen, carbon dioxide and oxygen. The software part realizes waveform display, storage and playback, et al. The experimental results show that the system is safe and reliable which provides reliable measurement parameters for evaluating human respiratory, cardiac function, circulation, metabolism and other functions. It has a good application prospect.


Sujets)
Humains , Électrocardiographie , Épreuve d'effort , Coeur , Rythme cardiaque , Oxygène
4.
Chinese Journal of Medical Instrumentation ; (6): 47-50, 2020.
Article Dans Chinois | WPRIM | ID: wpr-942695

Résumé

The study comprehensively puts forward several detection methods to arteriosclerosis and mainly discusses the method for pulse wave velocity (PWV for short) and ankle brachial index (ABI for short). On the basis of methods mentioned above, a portable system device for arteriosclerosis detection based on non-invasive PWV and limb blood pressure is introduced, and expectations for the subsequent engineering design and development direction are given for reference.


Sujets)
Humains , Cheville , Artériosclérose/diagnostic , Vitesse du flux sanguin , Pression sanguine , Artère brachiale , Analyse de l'onde de pouls
5.
Chinese Journal of Medical Instrumentation ; (6): 345-347, 2019.
Article Dans Chinois | WPRIM | ID: wpr-772489

Résumé

This article describes the design of a portable blood oxygen simulation system that can be used to simulate various blood gas saturation states of the human body. The system can be used to simulate various states of blood gas saturation, and can also simulate large blood oxygen saturation dynamic range, pulse rate range and perfusion index range. It can be used for testing, but not for clinical examination instruments. Moreover, the system has the characteristics of small size and low cost compared with the commercial blood oxygen simulator. Although the simulation system is not directly used for the detection of blood gas saturation of patients, it is also an essential equipment in the production and testing process, so it has certain practical value.


Sujets)
Humains , Rythme cardiaque , Oxymétrie , Oxygène
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