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Porous metal capillary seepage microneedle electrode and preparing method

A porous metal, capillary wick technology, applied in the field of medical devices, can solve the problems of increasing the impedance link in the test process, small signal-to-noise ratio of electrical signals, poor quality of electrical signals, etc. Reduce the effect of relative slip

Pending Publication Date: 2019-02-15
广东中昇华控智能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of the conductive paste and the cuticle of the epidermis increases the impedance link of the test process, resulting in poor quality of the electrical signal. At the same time, the loss of the conductive paste or evaporation and drying will also cause the signal-to-noise ratio of the electrical signal to be small, and long-term use will also cause damaged skin
On the other hand, the surface of the traditional electrode sheet is relatively smooth, and it is easy to slide relative to the skin, so that the collected electrical signal contains a lot of artifacts

Method used

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  • Porous metal capillary seepage microneedle electrode and preparing method
  • Porous metal capillary seepage microneedle electrode and preparing method
  • Porous metal capillary seepage microneedle electrode and preparing method

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Experimental program
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Embodiment 1

[0040] Such as Figure 1-9 as shown, figure 1 It is a cross-sectional view of a porous metal capillary seepage microneedle electrode of the present invention; figure 2 It is a structural schematic diagram of a porous microneedle array electrode sheet; Figure 4 It is a schematic diagram of the structure of the insulating shell.

[0041] Such as figure 1 and Figure 4As shown, a porous metal capillary seepage microneedle electrode includes an insulating shell 2, the interior of the insulating shell 2 forms a cavity, and has an opening on one side, and an electrical signal line is opened on the insulating shell Holes 9 and solution injection holes 10; a porous microneedle array electrode sheet 1, the porous microneedle array electrode sheet 1 is combined with the opening and sealing of the insulating casing 2, and the porous microneedle array electrode sheet 1 is provided with multiple A porous microneedle with a channel 12, the channel 12 is parallel to the central axis o...

Embodiment 2

[0057] The porous metal capillary liquid-permeable microneedle electrode of this embodiment is the same as that of Embodiment 1, except that the thickness of the porous metal microneedle array electrode sheet is 1.5 mm. The bottom diameter of the microneedle is 300 μm, the height is 500 μm, the pitch is 1 mm, and the diameter of the channel 12 is 100 μm. The insulating shell 2 is made of silica gel, and the adhesive 5 is a silica gel elastic sealant.

[0058] The preparation method of the porous metal capillary seepage microneedle electrode is similar to that of Example 1, except that the diameter of the titanium metal particles is 5 μm, and the titanium metal particles, ethanol, PVB, BBP, and dispersant are 46:46: The mass fraction ratio of 1:6.5:1.5 is mixed. And in the step (4), the sintering is carried out under the atmosphere of nitrogen gas.

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Abstract

The invention discloses a porous metal capillary seepage microneedle electrode and a preparing method. The porous metal capillary seepage microneedle electrode comprises a porous microneedle array electrode slice, an insulated shell, an electric signal line and a capillary liquid absorbing core ring, and multiple porous microneedles with groove channels are arranged on the porous microneedle arrayelectrode slice; a cavity is formed inside the insulated shell, an opening is formed in one side of the insulated shell, the porous microneedle array electrode slice and the opening of the insulatedshell are sealably spliced to form a cavity, and the cavity is filled with the capillary liquid absorbing core ring; the groove channels are communicated with the cavity. According to the porous metalcapillary seepage microneedle electrode, based on the advantages of the microneedle structures, the adsorptivity and diversion performance of the porous groove channel structures on a solution and the conductivity of the solution are utilized for achieving direct contact between a sensor and the corium layer of the skin, the contact impedance is greatly reduced, and bio-electricity signals with ahigh signal-to-noise ratio can be collected.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a porous metal capillary seepage microneedle electrode and a preparation method thereof. Background technique [0002] With the development of electronic technology and the advancement of medical detection technology, human bioelectricity extraction can provide an important basis for disease diagnosis and prevention. Sensors that can be used continuously for a long time and collect signals with high signal-to-noise ratio have attracted more and more attention. [0003] The electrode sheet is the core component of the bioelectric sensor, and its performance is directly related to the result of signal acquisition. At present, the commonly used EEG sensors and EMG sensors on the market need to be used with conductive paste in the process of collecting electrical signals. Before the test, apply the conductive paste on the skin first, and then put the electrodes on the conduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B90/00
CPCA61B90/00
Inventor 揣琳
Owner 广东中昇华控智能科技股份有限公司
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