Manufacturing method of PVDF micro-force sensor and application method of PVDF micro-force sensor in surgical instrument

Abstract

The invention provides a manufacturing method of a PVDF (Polyvinylidene Fluoride) micro-force sensor and an application method of the PVDF micro-force sensor in a surgical instrument, which are used for preparing a sensor capable of detecting stress data of a cardiovascular intervention surgical instrument in a blood vessel, and the micro-force sensor is of an elastic sandwich structure packaged by a waterproof and insulating protective film, comprises a piezoelectric film serving as a middle layer of the elastic sandwich structure, and further comprises two electrodes connected with the top face and the bottom face of the piezoelectric film respectively. The elastic sandwich structure is embedded in a mounting groove of the surgical instrument, the bottom surface or the top surface of the elastic sandwich structure is located on the outer surface of the surgical instrument, and when stress of the surgical instrument in a blood vessel is conducted to the micro-force sensor, a piezoelectric film of the micro-force sensor generates a detection electric signal; and according to the invention, the stress of a surgical instrument in a blood vessel can be measured with high sensitivity in real time, and the micro grinding force measuring device can be used for measuring the micro grinding force of collision between a rotary grinding head and a calcified tissue or a cardiovascular wall in a coronary artery plaque rotary grinding operation, so that the safety of removing the calcified tissue is improved.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a manufacturing method of a PVDF micro-force sensor and an application method thereof in surgical instruments. Background technique [0002] Piezoelectric thin film sensor is a kind of dynamic strain sensor. The sensitive element is made of piezoelectric material. It is a sensor based on piezoelectric effect. It is often used in the monitoring of life signals on the surface of human skin or implanted in the human body. [0003] PVDF (polyvinylidene fluoride) is an organic piezoelectric material, which has the characteristics of small size, light weight, flexible material, low impedance, high voltage constant, wide frequency band response, and little influence on the mechanical properties of the structure. It is suitable for use as a piezoelectric material. Sensitive elements of electrical sensors. As early as 1977, the Shanghai Institute of Chemistry, Chinese Academy of Sciences...

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Problems solved by technology

[0005] However, coronary artery spasm, coronary artery dissection, coronary artery slow blood flow/no-reflow, rupture of the rotational atherectomy guide wire, incarceration of the atherectomy head, coronary artery perforation, or cardiac tamponade still exist in the above-mentioned rotational atherectomy. risk of co

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