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Method and device for estimating nervous degree of human body by optical plethysmography

A technique of photoplethysmography and tension, applied in psychological devices, instruments for radiological diagnosis, applications, etc., can solve problems such as affecting subjects

Active Publication Date: 2004-08-04
SAMSUNG ELECTRONICS CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the requirements of large-scale systems, the subject is subject to many constraints, so the measurement itself affects the subject as a stressful environment.
In addition, in order to obtain PPG from the subject's finger, a glove type or finger contact type measuring device is used, so the subject is limited in operations such as working on a personal computer (PC) and others using hands

Method used

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  • Method and device for estimating nervous degree of human body by optical plethysmography
  • Method and device for estimating nervous degree of human body by optical plethysmography
  • Method and device for estimating nervous degree of human body by optical plethysmography

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Embodiment Construction

[0028] Hereinafter, preferred embodiments of the present invention are described in detail with reference to the accompanying drawings.

[0029] Information on the degree of constriction of peripheral blood vessels and increase or decrease in cardiac output is reflected in photoplethysmography (PPG), and the degree of constriction of peripheral blood vessels and increase or decrease in cardiac output is governed by the autonomic nervous system that controls myocardial movement. For example, when the sympathetic nerves are excited by external stimuli, cardiac functions, such as increased heart rate (HR) and stimulation conduction rate or increased excitability, and increased contractility. HR refers to heart beats per minute, and HR is expressed in beats per minute (BPM). A normal adult has an HR of 60-90 BPM. HR increases during exercise, mental excitement, or fever and decreases during sleep. In other words, when the sympathetic nerve is excited, the increase in HR leads to...

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Abstract

A method and apparatus for evaluating human stress using PhotoPlethysmoGraphy (PPG) are provided. The method of evaluating human stress using PhotoPlethysmoGraphy (PPG), comprising: defining at least one PPG parameter; radiating light having at least one wavelength reacting to a blood component to be measured at a measuring target and measuring a PPG signal from the measuring target during a predetermined period of time; and evaluating human stress using stress indexes obtained from the PPG parameter.

Description

technical field [0001] The present invention relates to assessing the tension of human body, in particular, to a method and device for assessing the tension of human body by using photoplethysmography (PPG). Background technique [0002] In the field of medical diagnosis, various methods have been tried using PPG to diagnose cardiovascular diseases or to detect the degree of progression of diseases or hardening of blood vessels. The PPG refers to a signal corresponding to the amount of light reflected by a selected part of the human body after being irradiated with light, and the irradiated light emitted from the light source of the light emitting device has a specific wavelength. Techniques using PPG have been primarily developed for the purpose of determining the physiological state of a patient in relation to the arterial system, but are often used as an aid in the diagnosis of specific diseases. [0003] For example, US Publication No. US5830131 discloses a monitor for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0245A61B5/00A61B5/02A61B5/024A61B5/16
CPCA61B5/1455A61B5/02416A61B5/4884A61B5/02
Inventor 吕炯锡李定桓尹吉源黄现泰
Owner SAMSUNG ELECTRONICS CO LTD
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