CN113925626A - Fabrication method of PVDF micro-force sensor and its application in surgical instruments - Google Patents

Abstract

The invention provides a manufacturing method of a PVDF micro-force sensor and an application method thereof in a surgical instrument, which are used for preparing a sensor capable of detecting stress data of a cardiovascular interventional surgical instrument in a blood vessel, wherein the micro-force sensor is 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 also comprises two electrodes respectively connected with the top surface and the bottom surface of the piezoelectric film; the elastic sandwich structure is embedded in the installation groove of the surgical instrument, the bottom surface or the top surface of the elastic sandwich structure is positioned on the outer surface of the surgical instrument, and when the stress of the surgical instrument in a blood vessel is conducted to the micro-force sensor, the piezoelectric film of the micro-force sensor generates a detection electric signal; the invention can carry out high-sensitivity measurement on the stress of a surgical instrument in a blood vessel in real time, can be used for measuring the tiny grinding force of the collision of a rotary grinding head and a calcified tissue or a cardiovascular wall in the rotational grinding of coronary artery plaque, and increases the safety of removing the calcified tissue.

Description

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

Technical Field

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 of the PVDF micro-force sensor in a surgical instrument.

Background

The piezoelectric film sensor is a dynamic strain sensor, the sensitive element is made of piezoelectric materials, and the piezoelectric film sensor is a sensor based on piezoelectric effect and is commonly used for monitoring vital signals on the surface of human skin or implanted in a human body.

PVDF (polyvinylidene fluoride) is an organic piezoelectric material, has the characteristics of small volume, light weight, flexible material, low impedance, high piezoelectric voltage constant, wide frequency band response, small influence on the mechanical property of a structure and the like, and is suitable for being used as a sensitive element of a piezoelectric sensor. Piezoelectric PVDF was developed by shanghai chemical institute of chinese academy of sciences as early as 1977, and is now widely used in almost all fields including hydrophones and sonars, medical sensing, and ignition and detonation. The PVDF piezoelectric film surface will generate polarization phenomenon after stress, thereby generating electric charge on two surfaces, after being amplified by a charge amplifier and a measuring circuit and transformed into impedance, the electric charge is output in direct proportion to the external force, the quantity of the electric charge generated by the film is related to the piezoelectric coefficient and the stress magnitude of the film, therefore, under the condition of controlling the piezoelectric coefficient and the area of the film to be unchanged, the piezoelectric film sensor is calibrated, and the stress magnitude can be obtained by measuring the output electric charge of the PVDF piezoelectric film sensor.

The rotational atherectomy (CRA) of coronary artery plaque utilizes the principle of differential cutting, selectively removes calcified or fibrous arteriosclerosis plaque by a physical rotational atherectomy method, is mainly suitable for highly calcified lesions of coronary artery, and is a means for removing the atherosclerosis plaque which is more clinically applied. Early coronary atherectomy is assisted by balloon dilatation or stenting for plaque ablation purposes. In recent years, with the development of interventional therapy, rotational atherectomy has focused more on plaque modification, and the risk of vascular injury is reduced by using a rotational atherectomy head to abrade calcified plaque to form a new passageway.

However, the rotational atherectomy described above still involves the risk of complications such as coronary spasm, coronary dissection, slow/no coronary flow, broken rotationally abraded guide wire, rotational atherectomy, coronary perforation or cardiac tamponade. In the operation, factors such as too fast propelling speed of the rotational grinding head, long time of single rotational grinding and the like can cause coronary artery spasm and dissection; the factors such as the manipulation of the rotating/grinding head may also cause serious complications such as the incarceration of the rotating/grinding head.

Disclosure of Invention

The invention provides a manufacturing method of a PVDF micro-force sensor and an application method of the PVDF micro-force sensor in a surgical instrument, which can measure the stress of the surgical instrument in a blood vessel in real time with high sensitivity, can be used for measuring the micro-grinding force of a rotary grinding head colliding with a calcified tissue or a cardiovascular wall in rotational atherectomy, and can increase the safety of removing the calcified tissue.

The invention adopts the following technical scheme.

The manufacturing method of the PVDF micro-force sensor is used for preparing the sensor capable of detecting the stress data of the cardiovascular interventional surgical instrument in a blood vessel, the micro-force sensor is an elastic sandwich structure packaged by a waterproof and insulating protective film, and comprises a piezoelectric film serving as the middle layer of the elastic sandwich structure and two electrodes respectively connected with the top surface and the bottom surface of the piezoelectric film; the elastic sandwich structure is embedded in the installation groove of the surgical instrument, the bottom surface or the top surface of the elastic sandwich structure is positioned on the outer surface of the surgical instrument, and when the stress of the surgical instrument in a blood vessel is conducted to the micro-force sensor, the piezoelectric film of the micro-force sensor generates a detection electric signal.

The piezoelectric film is a PVDF piezoelectric film subjected to polarization treatment; the protective film is a PET release film; and the upper surface and the lower surface of the PVDF piezoelectric film are covered with electrodes.

The electrode is a red copper layer with the thickness of 10 mu m; the thickness of the PVDF piezoelectric film is 28 micrometers; the thickness of the PET release film is 100 mu m.

The PET release film is subjected to heat sealing treatment to form a closed insulating layer around the micro force sensor, the PET release film is subjected to thermoplastic treatment to enable the thermoplastic force of the PET release film to bend and mold the micro force sensor until the micro force sensor can be basically matched with the shape of the outer surface of a surgical instrument and can be attached to a mounting groove in the outer surface of the surgical instrument, and the arc shapes of the top surface and the bottom surface of the micro force sensor are matched with the surface of the surgical instrument.

The application method of the PVDF micro-force sensor in the surgical instrument adopts the PVDF micro-force sensor, and the surgical instrument is a rotary grinding head of a cardiovascular calcified tissue removing device; one side or two sides of the outer surface of the rotary grinding head are provided with installation grooves for installing the PVDF micro-force sensor; the micro-force sensor is arranged on one side of the rotary grinding head or symmetrically arranged on two sides of the rotary grinding head.

A radial through hole and an axial center hole which are communicated are arranged in the rotary grinding head; a transmission shaft for driving the rotary grinding head is fixed in an axial central hole in the rotary grinding head, and the transmission shaft and the axial central hole have the same axle center; when the rotary grinding head grinds the calcified tissue/cardiovascular wall, the generated rotary grinding force acts on the PVDF piezoelectric film of the PVDF micro-force sensor, so that the PVDF piezoelectric film is polarized, the upper surface and the lower surface of the PVDF piezoelectric film generate stress detection charges, and the stress detection charges are transmitted to an external data acquisition instrument through an electrode and an insulating wire harness; the insulation wire harness is arranged in a radial through hole and an axial central hole of the rotary grinding head.

The rotary grinding head is driven by a motor through a flexible transmission shaft; the flexible transmission shaft is arranged in the hollow shaft at the motor support and is in interference fit with the hollow shaft, and the motor drives the flexible transmission shaft to rotate to drive the rotary grinding head when driving the hollow shaft to rotate; a sensor wiring with one end connected with a data acquisition instrument is arranged in the hollow shaft; the insulating wire harness penetrates out of the rotary grinding head and then enters the transmission sheath, and reaches the rotary joint through the transmission sheath and is connected with the other end of the wiring of the sensor in the hollow shaft; the rotary joint is connected with the hollow shaft through a coupler.

The sensor wiring is connected with the charge amplifier and the measuring circuit, and the stress detection charge received by the sensor wiring from the insulated wire harness is amplified and impedance-transformed to form an electrical detection signal of the PVDF micro-force sensor which is in direct proportion to the rotational abrasion force applied to the PVDF micro-force sensor and then sent to the upper computer.

The upper computer determines calibration associated data between the rotational grinding force between the rotational grinding head and the calcified tissue/cardiovascular wall and the electric detection signal of the PVDF micro-force sensor through calibrating the relation between the stress of the PVDF micro-force sensor and the electric detection signal;

and the upper computer measures the electrical detection signal of the PVDF micro-force sensor by using the voltage detection module, retrieves corresponding stress data from the calibrated associated data according to the measurement result, and uses the stress data as the rotational grinding force data between the current rotational grinding head and the calcified tissue/cardiovascular wall measured by the PVDF micro-force sensor.

When the rotational grinding head is used for rotational grinding of the coronary plaque, the upper computer monitors the grinding force between the rotational grinding head and the plaque or the coronary artery wall through measured rotational grinding force data, and displays the real-time rotating speed and the grinding force of the rotational grinding head on a TJC screen of rotational grinding equipment, so that an operator can evaluate whether the current rotational grinding head can seriously stimulate the coronary artery wall in real time.

Compared with the prior art, the invention has the following advantages:

1. under the condition of less influence on the mechanical property of the cardiovascular interventional surgical instrument structure, a micro-force sensor with higher sensitivity is arranged in a groove on the outer surface of the rotary grinding head.

2. In the rotational atherectomy of coronary artery plaques, the PVDF micro-force sensor can feed back the grinding force between the rotational head and the plaques or the coronary artery walls in real time, so that the condition in the operation can be observed in real time conveniently, the stimulation of the rotational head to the coronary arteries is reduced, and the risk of postoperative complications is reduced.

3. Because the micro-force sensor has high sensitivity, whether the current grinding part of the rotary grinding head is a lesion spot or a normal blood vessel can be quickly judged from monitoring data, and an alarm can be quickly given when the blood vessel grinding phenomenon occurs.

Drawings

The invention is described in further detail below with reference to the following figures and detailed description:

FIG. 1 is a schematic layered view of a micro-force sensor according to the present invention;

FIG. 2 is a schematic view of a micro-force sensor of the present invention disposed on a rotational atherectomy head;

FIG. 3 is another schematic view of the micro-force sensor of the present invention disposed on a rotational atherectomy head;

FIG. 4 is a schematic perspective view of a micro-force sensor of the present invention mounted on a rotational atherectomy head;

FIG. 5 is a schematic diagram of a wiring harness layout of the micro-force sensor;

FIG. 6 is a schematic flow chart of the present invention for rotational atherectomy of coronary artery plaque;

in the figure: 1-a piezoelectric film; 2-an electrode; 3-protective film; 4-micro force sensor; 5-axial center hole; 6-radial through holes; 7-a rotary grinding head; 8-an insulated wire harness; 9-a flexible transmission shaft; 10-a hollow shaft; 11-a motor support; 12-a coupling; 13-sensor wiring; 14-a rotary joint; 15-driving sheath.

Detailed Description

As shown in the figure, the manufacturing method of the PVDF micro-force sensor is used for preparing the sensor capable of detecting the stress data of the cardiovascular interventional surgical instrument in the blood vessel, themicro-force sensor 4 is an elastic sandwich structure packaged by a waterproof and insulatingprotective film 3, and comprises a piezoelectric film 1 serving as the middle layer of the elastic sandwich structure and twoelectrodes 2 respectively connected with the top surface and the bottom surface of the piezoelectric film; the elastic sandwich structure is embedded in the installation groove of the surgical instrument, the bottom surface or the top surface of the elastic sandwich structure is positioned on the outer surface of the surgical instrument, and when the stress of the surgical instrument in a blood vessel is conducted to the micro-force sensor, the piezoelectric film of the micro-force sensor generates a detection electric signal.

The piezoelectric film is a PVDF piezoelectric film subjected to polarization treatment; the protective film is a PET release film; and the upper surface and the lower surface of the PVDF piezoelectric film are covered with electrodes.

The electrode is a red copper layer with the thickness of 10 mu m; the thickness of the PVDF piezoelectric film is 28 micrometers; the thickness of the PET release film is 100 mu m.

The PET release film is subjected to heat sealing treatment to form a closed insulating layer around the micro force sensor, the PET release film is subjected to thermoplastic treatment to enable the thermoplastic force of the PET release film to bend and mold the micro force sensor until the micro force sensor can be basically matched with the shape of the outer surface of a surgical instrument and can be attached to a mounting groove in the outer surface of the surgical instrument, and the arc shapes of the top surface and the bottom surface of the micro force sensor are matched with the surface of the surgical instrument.

The application method of the PVDF micro-force sensor in the surgical instrument adopts the PVDF micro-force sensor, and the surgical instrument is arotary grinding head 7 of a cardiovascular calcified tissue removing device; one side or two sides of the outer surface of the rotary grinding head are provided with installation grooves for installing the PVDF micro-force sensor; the micro-force sensor is arranged on one side of the rotary grinding head or symmetrically arranged on two sides of the rotary grinding head.

A radial throughhole 6 and anaxial center hole 5 which are communicated are arranged in the rotary grinding head; a transmission shaft for driving the rotary grinding head is fixed in an axial central hole in the rotary grinding head, and the transmission shaft and the axial central hole have the same axle center; when the rotary grinding head grinds the calcified tissue/cardiovascular wall, the generated rotary grinding force acts on the PVDF piezoelectric film of the PVDF micro-force sensor, so that the PVDF piezoelectric film is polarized, the upper surface and the lower surface of the PVDF piezoelectric film generate stress detection charges, and the stress detection charges are transmitted to an external data acquisition instrument through an electrode and aninsulating wire harness 8; the insulation wire harness is arranged in a radial through hole and an axial central hole of the rotary grinding head.

The rotary grinding head is driven by a motor through a flexible transmission shaft 9; the flexible transmission shaft is arranged in thehollow shaft 10 at the position of themotor support 11 and is in interference fit with the hollow shaft, and when the motor drives the hollow shaft to rotate, the flexible transmission shaft is driven to rotate so as to drive the rotary grinding head; asensor wiring 13 with one end connected with a data acquisition instrument is arranged in the hollow shaft; the insulated wire harness penetrates out of the rotary grinding head, enters thetransmission sheath 15, reaches therotary joint 14 through the transmission sheath, and is connected with the other end of the wiring of the sensor in the hollow shaft; the swivel joint is connected to the hollow shaft via acoupling 12.

The sensor wiring is connected with the charge amplifier and the measuring circuit, and the stress detection charge received by the sensor wiring from the insulated wire harness is amplified and impedance-transformed to form an electrical detection signal of the PVDF micro-force sensor which is in direct proportion to the rotational abrasion force applied to the PVDF micro-force sensor and then sent to the upper computer.

The upper computer determines calibration associated data between the rotational grinding force between the rotational grinding head and the calcified tissue/cardiovascular wall and the electric detection signal of the PVDF micro-force sensor through calibrating the relation between the stress of the PVDF micro-force sensor and the electric detection signal;

and the upper computer measures the electrical detection signal of the PVDF micro-force sensor by using the voltage detection module, retrieves corresponding stress data from the calibrated associated data according to the measurement result, and uses the stress data as the rotational grinding force data between the current rotational grinding head and the calcified tissue/cardiovascular wall measured by the PVDF micro-force sensor.

When the rotational grinding head is used for rotational grinding of the coronary plaque, the upper computer monitors the grinding force between the rotational grinding head and the plaque or the coronary artery wall through measured rotational grinding force data, and displays the real-time rotating speed and the grinding force of the rotational grinding head on a TJC screen of rotational grinding equipment, so that an operator can evaluate whether the current rotational grinding head can seriously stimulate the coronary artery wall in real time.

In the embodiment, the piezoelectric film in the PVDF micro-force sensor generates polarization after being subjected to stress generated by the rotational grinding head and the calcified tissue/cardiovascular wall, positive and negative charges are generated on the upper surface and the lower surface, and the charges are transferred to the wire harness by the red copper electrode material and then are transmitted to the outside of the body by the insulating wire harness.

In this embodiment, the insulating wire harness will successively pass through the inside of the rotary grinding head and the inside of the transmission sheath to reach the outside of the body, and then pass through the inside of the motor transmission shaft, the motor transmission shaft will be connected with the rotary joint through the coupler, and the wire harness will pass through the rotary joint and finally reach a static state.

In this embodiment, after reaching a static state, the wire harness is amplified by the charge amplifier and the measuring circuit and transforms impedance, and then outputs electric quantity proportional to the external force, and is connected to the voltage detection module for electric quantity measurement.

In the embodiment, the relationship between the stress generated by the spin grinding head and the calcified tissue/cardiovascular wall spin grinding and the output electric quantity is determined by calibrating the PVDF micro-force sensor.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

Translated fromChinese

1. PVDF微力传感器的制作方法，用于制备可检测心血管介入手术器械在血管内的受力数据的传感器，其特征在于：所述微力传感器为以防水、绝缘的保护膜封装的弹性夹层结构，包括作为弹性夹层结构中间层的压电薄膜，还包括分别与压电薄膜的顶面、底面相连的两个电极；所述弹性夹层结构嵌于手术器械的安装槽中且其底面或顶面位于手术器械的外表面处，当手术器械在血管中的受力传导至微力传感器时，微力传感器的压电薄膜产生检测电信号。1. The manufacturing method of PVDF micro-force sensor is used to prepare a sensor that can detect the force data of cardiovascular interventional surgical instruments in blood vessels, it is characterized in that: the micro-force sensor is an elastic sandwich structure encapsulated with a waterproof and insulating protective film , including a piezoelectric film as the middle layer of the elastic sandwich structure, and two electrodes respectively connected to the top and bottom surfaces of the piezoelectric film; the elastic sandwich structure is embedded in the installation groove of the surgical instrument and its bottom surface or top surface Located at the outer surface of the surgical instrument, when the force of the surgical instrument in the blood vessel is conducted to the micro-force sensor, the piezoelectric film of the micro-force sensor generates a detection electrical signal.2.根据权利要求1所述的PVDF微力传感器的制作方法，其特征在于：所述压电薄膜为经极化处理的PVDF压电薄膜；所述保护膜为PET离型膜；所述PVDF压电薄膜的上表面、下表面均覆盖电极。2. The method for making a PVDF micro-force sensor according to claim 1, wherein the piezoelectric film is a polarized PVDF piezoelectric film; the protective film is a PET release film; the PVDF pressure The upper surface and the lower surface of the electric thin film both cover the electrodes.3.根据权利要求2所述的PVDF微力传感器的制作方法，其特征在于：所述电极为厚度为10μm的紫铜层；所述PVDF压电薄膜厚度为28μm；所述PET离型膜厚度为100μm。3 . The method for manufacturing a PVDF micro-force sensor according to claim 2 , wherein the electrode is a copper layer with a thickness of 10 μm; the PVDF piezoelectric film has a thickness of 28 μm; the PET release film has a thickness of 100 μm .4.根据权利要求2所述的PVDF微力传感器的制作方法，其特征在于：所述PET离型膜经热封处理以在微力传感器的四周形成封闭的绝缘层，PET离型膜经热塑处理以使PET离型膜的热塑力对微力传感器弯曲塑型，直至微力传感器能与手术器械外表面形状基本吻合并能贴附于手术器械外表面的安装槽中，微力传感器的顶面、底面的弧面形状与手术器械表面匹配。4. The manufacturing method of the PVDF micro-force sensor according to claim 2, wherein the PET release film is subjected to heat-sealing treatment to form a closed insulating layer around the micro-force sensor, and the PET release film is subjected to thermoplastic treatment The micro-force sensor is bent and shaped by the thermoplastic force of the PET release film until the micro-force sensor can basically match the shape of the outer surface of the surgical instrument and can be attached to the installation groove on the outer surface of the surgical instrument. The top and bottom surfaces of the micro-force sensor The cambered shape matches the surface of the surgical instrument.5. PVDF微力传感器在手术器械中的应用方法，采用权利要求4中所述的PVDF微力传感器，其特征在于：所述手术器械为心血管钙化组织去除装置的旋磨头；旋磨头外表面的一侧或两侧设有用于安装PVDF微力传感器的安装槽；所述微力传感器设于旋磨头一侧，或是在旋磨头两侧对称设置。5. The application method of PVDF micro-force sensor in surgical instruments, using the PVDF micro-force sensor described in claim 4, it is characterized in that: described surgical instrument is the rotational atherectomy head of the cardiovascular calcified tissue removal device; A mounting groove for installing PVDF micro-force sensor is arranged on one side or both sides of the micro-force sensor; the micro-force sensor is arranged on one side of the rotational atherectomy head, or symmetrically arranged on both sides of the rotational atherectomy head.6.根据权利要求5所述的PVDF微力传感器在手术器械中的应用方法，其特征在于：所述旋磨头内设有相通的径向通孔和轴向中心孔；旋磨头内的轴向中心孔内固定有驱动旋磨头的传动轴，且该传动轴与轴向中心孔同轴心；旋磨头在钙化组织/心血管壁处旋磨时，产生的旋磨力作用于PVDF微力传感器的PVDF压电薄膜处，使PVDF压电薄膜发生极化现象，PVDF压电薄膜的上表面、下表面产生受力检测电荷，所述受力检测电荷经电极、绝缘线束传输至体外的数据采集仪器；所述绝缘线束设于旋磨头的径向通孔和轴向中心孔内。6. The application method of PVDF micro-force sensor in surgical instruments according to claim 5, characterized in that: the rotational atherectomy head is provided with a radial through hole and an axial center hole that communicate with each other; A transmission shaft for driving the rotational atherectomy head is fixed into the central hole, and the transmission shaft is coaxial with the axial central hole; when the rotational atherectomy head is rotationally abraded at the calcified tissue/cardiovascular wall, the rotational atherectomy force generated acts on the PVDF At the PVDF piezoelectric film of the micro-force sensor, the PVDF piezoelectric film is polarized, and the upper surface and the lower surface of the PVDF piezoelectric film generate force detection charges, and the force detection charges are transmitted to the external body through the electrodes and the insulated wire harness. A data acquisition instrument; the insulated wire harness is arranged in the radial through hole and the axial center hole of the rotational grinding head.7.根据权利要求6所述的PVDF微力传感器在手术器械中的应用方法，其特征在于：所述旋磨头由电机经柔性传动轴驱动；所述柔性传动轴置于电机支架处的空心轴内且与空心轴过盈配合，电机驱动空心轴转动时驱动柔性传动轴旋转以驱动旋磨头；所述空心轴内设有一端与数据采集仪器相连的传感器接线；所述绝缘线束从旋磨头穿出后进入传动鞘，经传动鞘到达旋转接头处，与空心轴内传感器接线的另一端相连；所述旋转接头经联轴器与空心轴相连。7. The application method of PVDF micro-force sensor in surgical instruments according to claim 6, characterized in that: the rotational atherectomy head is driven by a motor through a flexible drive shaft; the flexible drive shaft is placed on a hollow shaft at the motor support Inside and in interference fit with the hollow shaft, when the motor drives the hollow shaft to rotate, it drives the flexible transmission shaft to rotate to drive the rotational atherectomy head; the hollow shaft is provided with a sensor wiring connected to the data acquisition instrument at one end; The head enters the transmission sheath after passing through, reaches the rotary joint through the transmission sheath, and is connected with the other end of the sensor wiring in the hollow shaft; the rotary joint is connected with the hollow shaft through the coupling.8.根据权利要求6所述的PVDF微力传感器在手术器械中的应用方法，其特征在于：所述传感器接线与电荷放大器、测量电路相连，传感器接线从绝缘线束接收的受力检测电荷经放大处理和变换阻抗处理后，形成正比于PVDF微力传感器所受旋磨力的PVDF微力传感器电检测信号并发送给上位机。8. The application method of PVDF micro-force sensor in surgical instruments according to claim 6, characterized in that: the sensor wiring is connected with a charge amplifier and a measurement circuit, and the force detection charge received by the sensor wiring from the insulated wire harness is amplified and processed After processing with the transformed impedance, the PVDF micro-force sensor electrical detection signal proportional to the rotational abrading force of the PVDF micro-force sensor is formed and sent to the upper computer.9.根据权利要求8所述的PVDF微力传感器在手术器械中的应用方法，其特征在于：所述上位机通过对PVDF微力传感器受力与电检测信号之间关系的标定，来确定来自旋磨头与钙化组织/心血管壁之间旋磨力与PVDF微力传感器电检测信号之间的标定关联数据；9. The application method of PVDF micro-force sensor in surgical instruments according to claim 8, characterized in that: the upper computer determines the origin from rotational atherectomy by calibrating the relationship between the PVDF micro-force sensor and the electrical detection signal. Calibration correlation data between rotational atherectomy force between head and calcified tissue/cardiovascular wall and electrical detection signal of PVDF micro-force sensor;上位机以电压检测模块对PVDF微力传感器电检测信号进行测量，并按测量结果，从已标定的标定关联数据中检索出对应受力数据，作为PVDF微力传感器测得的当前旋磨头与钙化组织/心血管壁之间的旋磨力数据。The host computer measures the electrical detection signal of the PVDF micro-force sensor with the voltage detection module, and retrieves the corresponding force data from the calibrated calibration correlation data according to the measurement result, as the current rotational atherectomy head and calcified tissue measured by the PVDF micro-force sensor. /Rotational force data between the cardiovascular walls.10.根据权利要求9所述的PVDF微力传感器在手术器械中的应用方法，其特征在于：当旋磨头用于冠状动脉斑块旋磨术时，所述上位机经测得的旋磨力数据来监控旋磨头与斑块或冠状动脉壁之间的磨削力大小，并在旋磨术设备的TJC屏上显示出旋磨头的实时转速与磨削力，供操作人员实时评估当前旋磨头是否会严重刺激冠状动脉壁。10. The application method of PVDF micro-force sensor in surgical instruments according to claim 9, characterized in that: when the rotational atherectomy head is used for rotational atherectomy, the rotational atherectomy force measured by the upper computer Data to monitor the grinding force between the rotational atherectomy head and the plaque or coronary wall, and display the real-time rotational speed and grinding force of the rotational atherectomy head on the TJC screen of the rotational atherectomy device for the operator to evaluate the current situation in real time. Whether the atherectomy tip can severely irritate the coronary artery wall.

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