Flexible micro-pressure sensor and preparation process

A micro-pressure sensor and preparation technology, applied in cardiac catheters, catheters, etc., can solve problems such as fistula blockage, thrombus formation, and slow blood flow, and achieve the effects of accurate monitoring, high electrical insulation, and small volume

Pending Publication Date: 2022-08-05
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems such as fistula blockage, slow blood flow, and thrombosis faced after long-term dialysis of arteriovenous fistula, the present invention proposes a preparation process of a flexible micro pressure sensor, which is a flexible, without its own power supply, with wireless information The micro-pressure sensor with conductivity can monitor the pressure changes of arteriovenous fistula in real time for a long time, and then reflect the state of arteriovenous fistula, so as to effectively prevent complications such as thrombosis and arteriovenous tumor after arteriovenous fistula

Method used

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  • Flexible micro-pressure sensor and preparation process

Examples

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Effect test

Embodiment 1

[0036] Example 1: as figure 1 As shown, a flexible micro-pressure sensor includes two flexible substrates with micro-deformability and insulation, which are a lower flexible substrate 1 and an upper flexible substrate 2 respectively. The two flexible substrates are stacked in sequence, and the upper surface of each flexible substrate is arranged The printed circuit and the lead pins connected to the printed circuit, wherein, the lower flexible substrate 1 is the first printed circuit 7, the lead is the first lead 5, the upper flexible substrate 2 is the second printed circuit 11, the lead is the second lead 9; the topmost printed circuit and the lead are provided with a flexible protective layer 12, each printed circuit includes a capacitor plate in the middle and an inductance coil surrounding the capacitor plate, and the lower flexible substrate 1 is The first capacitor plate 6 and the first inductance coil 4, and the second capacitor plate 10 and the second inductance coil ...

Embodiment 2

[0051] Example 2: as Image 6 As shown, other structures are the same as the embodiment, except that the flexible substrate has three layers, and the incision on the top flexible substrate 13 is set back relative to the incision on the upper flexible substrate 2, so that the third lead on the top flexible substrate 13 is connected to the upper layer. The second lead pins 9 on the flexible substrate 2 can be connected to form an LC circuit of a three-pole capacitor.

[0052] The preparation process of the present embodiment is as follows:

[0053] S1, prepare a three-layer flexible substrate for the micro pressure sensor, and cut a slope 3 with a certain slope on the upper flexible substrate 2 and the top flexible substrate 13, and the slope 3 on the top flexible substrate 13 is opposite to the upper flexible substrate 2. Bevel 3 set back;

[0054] S2, inkjet printing the first printed circuit 7 and the first lead 5 on the upper surface of the lower flexible substrate 1 to fo...

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Abstract

The invention discloses a flexible micro-pressure sensor and a preparation process, the flexible micro-pressure sensor is formed by superposing a plurality of layers of flexible substrates printed with printed circuits, and the preparation process comprises the following steps: firstly, printing the printed circuits and lead heads on the upper surface of the flexible substrate serving as a bottom layer; covering a second layer of flexible substrate; printing a printed circuit and a lead head on the second-layer flexible substrate, cutting the second-layer flexible substrate to form an inclined surface with a certain inclination, printing the lead head to the inclined surface and extending to the lead head of the bottom-layer flexible substrate, so that the upper-layer circuit and the lower-layer circuit are connected together; and preparing a corresponding number of layers as required, and finally covering the flexible protection layer to complete the preparation of the flexible micro-pressure sensor. The invention is matched with a vector network analyzer to be used for measuring the pressure of blood vessels, organs or internal arteriovenous fistula in the medical field. The preparation process is simple, the detection sensitivity is high, wireless transmission type isolation detection can be realized, the use is convenient, and the practicability is high.

Description

technical field [0001] The invention belongs to the field of pressure sensors and relates to a pressure sensor, in particular to a flexible micro pressure sensor and a preparation process. Background technique [0002] An arteriovenous fistula is a surgical procedure used for hemodialysis treatment. The blood vessels of the arteriovenous fistula can provide sufficient blood to better complete the dialysis treatment. Arteriovenous fistulas have a certain lifespan, and have different surgical requirements for different types of blood vessels (eg, different blood vessel diameters). It is very important to detect the status of arteriovenous fistula, which can effectively prevent many complications, especially thrombosis. [0003] The current blood pressure monitoring method directly detects the blood pressure of a certain part of the body through an external device such as a sphygmomanometer, which reflects the overall blood pressure of the body, but cannot monitor the blood p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0215
CPCA61B5/02141A61B5/02152A61B5/6852A61B2562/0247
Inventor 李辉张云帆夏吉奡申胜男
Owner WUHAN UNIV
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