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Method and apparatus to measure bodily fluid and its change, and blood volume change

A characteristic information, non-invasive technology, applied in application, medical science, sensor, etc.

Pending Publication Date: 2019-11-12
MSHEAF HEALTH MANAGEMENT TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, bioimpedance and reactance are not good candidates to characterize body fluids and cardiovascular circulation

Method used

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  • Method and apparatus to measure bodily fluid and its change, and blood volume change
  • Method and apparatus to measure bodily fluid and its change, and blood volume change
  • Method and apparatus to measure bodily fluid and its change, and blood volume change

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Embodiment Construction

[0057] Embodiments of the present invention will now be described in further detail in conjunction with the accompanying drawings.

[0058] The present invention relates to non-invasive techniques for detecting electrical properties of biological tissue, such as tissue resistance and capacitance, and their patterns of change. The purpose of embodiments of the present invention is to capture changes in body fluids, blood flow and cardiovascular circulation for monitoring and information detection for non-therapeutic purposes. In one aspect, multiple alternating currents of different frequencies are applied simultaneously to the human or animal body. After receiving the modulated voltage signal, the received signal is demodulated. Cardiovascular system and surrounding tissue information is extracted from a carrier wave of a specified frequency. A system identification or channel estimation procedure is performed to separate different information about the cardiovascular circul...

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Abstract

The invention relates to a non-invasive method and system for detecting in-vivo tissue feature information. The method comprises the following steps: simultaneously applying a plurality of alternatingcurrents with different frequencies to a human body or an animal body; after the modulated voltage signal is received, demodulating the received signal; extracting information from the cardiovascularsystem and surrounding tissue from the carrier of the specified frequency; separating information of the cardiovascular circulatory system from information of surrounding tissue by performing a system identification or channel estimation procedure; respectively calculating the resistance and capacitance of the cardiovascular system and surrounding tissues thereof; representing the state of the bodily fluid and cardiovascular cycle through the calculated resistance and capacitance. Therefore, the corresponding state information can be accurately and reliably obtained, and the target tissue canbe conveniently and accurately measured to obtain the health state.

Description

[0001] This application is a continuation-in-part of U.S. Application Serial No. 16 / 004,204, filed June 8, 2018. This application claims priority to U.S. Provisional Application Nos. 62 / 653,596 and 62 / 653,610, both filed April 6, 2018. All the provisional applications mentioned above are fully incorporated into the present invention. technical field [0002] The invention relates to a non-invasive method and system for extracting characteristic information of tissues in the body. Background technique [0003] Bioimpedance and bioreactance measurements have been extensively explored as a non-invasive method of measuring blood flow and body fluid levels. These techniques are widely accepted in the medical field. But they have some disadvantages. First, all calculated parameters are based on impedance, which is frequency dependent. These parameters can only indirectly represent cardiovascular status. Also, since these parameters are frequency dependent, they suffer from fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/053A61B5/02
CPCA61B5/053A61B5/0537A61B5/02007A61B5/02028
Inventor 易成何碧霞谢鹏
Owner MSHEAF HEALTH MANAGEMENT TECH LTD
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