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Bio-information measurement device and method therefor

A technology of biological information and measuring device, which is applied in the field of biological information measuring device, can solve problems such as being difficult to use at home, and achieve the effect of a simple device

Inactive Publication Date: 2016-05-18
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned technique uses an electrocardiogram to obtain the pulse wave propagation time, so the subject needs to stick the electrodes for electrocardiogram measurement to a predetermined position, and it is difficult to use at home

Method used

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  • Bio-information measurement device and method therefor
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  • Bio-information measurement device and method therefor

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Experimental program
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no. 1 approach ＞

[0032] The cardiac output CO can be estimated (calculated) using the following equation (1) as long as the blood flow velocity AV, the blood vessel cross-sectional area AR, and the pulse rate PR are known. Blood flow velocity AV can be replaced by pulse wave velocity PWV.

[0033] CO=αPWV×AR×PR……(1)

[0034] Here, α is a coefficient obtained in advance.

[0035] The living body information measuring device 100 of the embodiment estimates the pulse wave velocity PWV, the cross-sectional area of ​​the blood vessel AR, and the heart rate PR from two photoelectric pulse wave signals measured at two places in the body, and calculates the heart rate using equation (1). output.

[0036] The appearance (mounted state) of the living body information measurement device 100 in the embodiment is shown in figure 2 shown in . Should figure 2 The illustrated biological information measurement device 100 is composed of a probe unit 1 attached to a fingertip and a measurement body unit ...

no. 2 approach ＞

[0144] In the living body information measurement device 100 of the first embodiment, if figure 2 As shown, the probe unit 1 is attached to the fingertip of the left hand, and the measurement main unit 2 is attached to the wrist of the left hand. The subject may move the hand on which the biological information measurement device 100 is attached, and the measurement is not limited to the same state (wrist orientation) every time, for example, a horizontal state with the wrist placed on a table or the like.

[0145] For example, the amount of blood flowing through the blood vessel changes between the state of raising the wrist and the state of lowering the wrist. That is, the direct current component DC changes. Therefore, there is a possibility that the fluctuation of the cardiac output CO cannot be accurately detected. Also, there is a possibility that the value of the cardiac output CO cannot be accurately calculated.

[0146] Therefore, in the second embodiment, the sta...

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Abstract

In this bio-information measurement device and bio-information measurement method, first and second pulse wave signals are acquired by shining first and second lights respectively on first and second measurement positions of a living body that differ from each other and receiving the respective lights passing through or reflected by the body, and the cardiac output of the body is calculated as bio-information on the basis of said first and second pulse wave signals. Such a bio-information measurement device and bio-information measurement method make it possible to continuously monitor changes in cardiac output using a simple device.

Description

technical field [0001] The present invention relates to a living body information measuring device and a living body information measuring method for measuring predetermined living body information based on time-series signals obtained from a living body. Background technique [0002] Conventionally, there is a living body information measurement device that detects living body information from a living body in a non-invasive manner. The living body information measuring device is, for example, a measuring device called a photoelectric sphygmograph for measuring the pulse waveform and pulse rate of a living body, and a measuring device called a pulse oximeter (PulseOximeter) for measuring oxygen in arterial blood. Saturation concentration measuring device, etc. The principle of these measurement devices is to obtain predetermined biological information based on pulse wave signals corresponding to fluctuations in pulsation due to living tissue obtained by receiving light tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/026A61B5/0205A61B5/0245
CPCA61B5/026A61B5/021A61B5/02416A61B5/029A61B5/1075A61B5/6824A61B5/6826A61B5/6829A61B2562/0219A61B2562/0238A61B2562/04A61B5/14552A61B5/7278A61B5/742
Inventor 馆田典浩龟泽仁司
Owner KONICA MINOLTA INC