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Apex beat sensor

An apical pulsation and sensor technology, applied in the field of reduced graphene oxide sensors, can solve problems such as unsuccessful development, and achieve the effects of improving sensitivity, shortening reaction time, and enhancing conductivity

Inactive Publication Date: 2017-05-10
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2008, a portable apical beat solid-state sensor was designed for bedside detection, but its further development was unsuccessful

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of flexible CuNWs-rGO-PDMS thin film is used as the apical pulse sensor of the conversion unit, including the conversion unit, the electrical signal acquisition unit and the constant voltage unit, the said constant voltage unit outputs the voltage signal of 0.1V to the conversion unit, and the electrical signal acquisition unit collects The resistance signal of the conversion unit; the conversion unit collects the mechanical energy of the apical beat and converts it into an electrical signal.

[0017] The electrical signal acquisition unit is a flexible CuNWs-rGO-PDMS film, and the non-toxic, harmless and non-irritating flexible CuNWs-rGO-PDMS film is adhered to the left fourth and fifth ribs of adults with medical tape. The signal that the apex of the heart hits the chest wall of the precordial region at a distance of 0.5-1cm close to the midline, causing the corresponding part of the intercostal tissue to pulsate outward.

[0018] The conversion unit includes a...

Embodiment 2

[0031] This example aims to study the influence of different parameters for the preparation of CuNWs-rGO thin films on sensor performance.

[0032] Table 1: Different Ascorbic Acid Amounts

[0033]

[0034] Note: The hydrothermal reaction temperature is 120°C, the hydrothermal time is 4h, and the film thickness is 200um.

[0035] Table 2: Different water heating temperatures

[0036]

[0037] Note: Ascorbic acid 60mg, water heating time 4h, film thickness 200um.

[0038] Table 3: Different Film Thicknesses

[0039]

[0040] Note: Ascorbic acid 60mg, hydrothermal reaction temperature 120 ℃, hydrothermal time 4h.

[0041] From Table 1 to Table 3, it can be seen that when the amount of ascorbic acid added is too small, graphene oxide is not completely reduced to rGO or gel is not completely formed after hydrothermal reaction for 4 hours, because the rGO sheets are stacked to form a gel. When the force between the atoms is not enough, the sheets cannot be tightly pack...

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PUM

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Abstract

The invention provides an apex beat sensor. CuNWs-rGO-PDMS composite films are prepared by the hydro-thermal method and suction filtration filming method. The sensor is used for testing the apex beat. The apex beat sensor has the advantages of being simple to prepare, low in cost, good in repeatability and the like. The apex beat sensor has flexibility and a high sensitivity, can be attached to the human skin, has no stimulation, can test the apex beat wave forms with complete information. The apex beat sensor possesses an important significance when being used in the diagnosis and clinical monitoring of cardiovascular diseases.

Description

technical field [0001] The invention belongs to the field of reduced graphene oxide sensors, in particular to a cardiac apex sensor. Background technique [0002] Early cardiovascular diseases do not have any clinical manifestations, and some symptoms are difficult to detect. Continuous heart monitoring in daily life is very necessary for the prevention and early treatment of heart diseases. In recent years, flexible electronic skin sensors have emerged in healthcare and are effective for noninvasive detection of human physiological signals. Among them, wearable electronic skin sensors for ECG testing are already under development for real-time monitoring. Although palpitations remain a fundamental part of physical examinations for heart disease, wearable devices for heart beat detection have been poorly studied. The representative heart beat is the apical beat, which can detect changes in volume and pressure in the heart. Therefore, the apical beat test can effectively su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/02A61B5/00
CPCA61B5/02A61B5/6801
Inventor 刘爱萍钱巍王夏华居乐乐
Owner ZHEJIANG SCI-TECH UNIV