Torsion measuring device and method for guide pipe

Abstract

The invention discloses a torsion measuring device and method for a catheter, and relates to the technical field of performance testing equipment for medical catheters.The torsion measuring device for the catheter comprises a testing platform; the two clamping assemblies are arranged on the testing platform, the distance between the two clamping assemblies is adjustable, each clamping assembly comprises a centering chuck, and the centering chucks are used for clamping the ends of catheter products and can rotate around the clamping centers of the centering chucks; the optical signal unit comprises an optical signal transmitting end and an optical signal receiving end, the optical signal transmitting end is in butt joint with one end of the catheter fixed through the clamping assembly, and the optical signal receiving end is in butt joint with the other end of the catheter. According to the torsion measuring device structure for the catheter, torsion transmission efficiency and kink extreme experiments of a catheter product can be more conveniently carried out, obtained measurement data are reliable, and reliable use reference is provided for subsequent use of the catheter product according to the measured data.

Description

Technical Field

[0001] The present application relates to the technical field of performance testing equipment for medical catheters, and in particular to a torsion measurement device and method for a catheter. Background Art

[0002] Medical catheters used in clinical stroke treatment may include angiographic catheters, access catheters, aspiration catheters, support catheters, intermediate catheters, microcatheters, and balloon catheters. Because these catheters are designed to access tortuous blood vessels, some require the operator to apply appropriate twisting force during their advancement, especially as the distal end approaches the lesion, after accessing the femoral or radial arteries. Furthermore, some catheters, particularly those designed to recanalize blood vessels, also require a degree of thrombus ablation near the lesion. For example, this may be to create cracks or broken edges in larger clots, facilitating their removal or other removal methods. Therefore, some catheters used in these clinical procedures require testing for torque transmission and kink resistance. However, no such devices or measurement methods are currently available. Summary of the Invention

[0003] The present application aims to solve one of the above-mentioned technical problems in the prior art. To this end, an embodiment of the present application provides a torsion measurement device for a catheter.

[0004] The embodiment of the present application also provides a measurement method.

[0005] According to an embodiment of the first aspect of the present application, there is provided a torsion measurement device for a catheter, comprising a test platform; Two sets of clamping assemblies are arranged on the test platform, the distance between the two sets of clamping assemblies is adjustable, and the clamping assemblies include a centering chuck, which is used to clamp the end of the catheter product and can rotate around its clamping center; The optical signal unit comprises an optical signal transmitting end and an optical signal receiving end. The optical signal transmitting end is connected to one end of the catheter fixed by the clamping assembly, and the optical signal receiving end is connected to the other end of the catheter.

[0006] The above-mentioned torsion measurement device for a catheter has at least the following beneficial effects: when performing a torsion test on a catheter product, the end of the catheter is clamped and fixed by the centering chucks of two sets of clamping assemblies, and the distance between the two sets of clamping assemblies is adjusted to straighten the catheter product. When performing a torsion torque test, one set of centering chucks is used as torque input, while the other set of centering chucks is not specifically restricted so that it can rotate with the application of torque, thereby facilitating measurement of the torque transmission efficiency of the current catheter product. When performing a kink test, one set of centering chucks is used as torque input, while the other set of centering chucks is set to be unable to rotate. Torque is gradually input so that kink-related data of the current catheter product can be observed and measured, and the optical signal unit is activated. The optical signal emitted by the transmitting end reaches the optical signal receiving end through transmission through the catheter. If the catheter product is kinked, the amount of optical signal reaching the optical signal receiving end is small, thereby confirming whether the catheter product has an extreme kink. The torsion measurement device structure for a catheter in the present application can more conveniently conduct torque transmission efficiency and kink extreme experiments on catheter products. The testing process is simple, and the obtained measurement data is reliable. The measured data can provide a reliable reference for subsequent use of catheter products.

[0007] According to the torsion measuring device for a catheter described in the embodiment of the first aspect of the present application, the centering chuck includes at least two clamping blocks, and the two clamping blocks are distributed in a circular array with the central axis of the centering chuck as the center, and all of the clamping blocks can synchronously approach or move away from the central axis of the centering chuck.

[0008] According to the torsion measuring device for a catheter described in the embodiment of the first aspect of the present application, the clamping assembly includes a clamping seat, and the clamping seat is connected to the test platform via a sliding structure so that the linear distance between the two groups of the clamping assemblies is adjustable.

[0009] According to the torsion measuring device for a catheter described in the embodiment of the first aspect of the present application, the sliding structure includes a slide groove and a slide rail that can cooperate with each other, wherein the test platform is provided with the slide rail, and the clamping seat is provided with the slide groove; or, the test platform is provided with the slide groove, and the clamping seat is provided with the slide rail.

[0010] According to the torsion measuring device for a catheter described in the embodiment of the first aspect of the present application, a measuring component is provided on the test platform, the measuring component is parallel to the line connecting the two centering clamps, and the measuring component is used to observe the torsion relative position size and torsion range of the catheter product.

[0011] According to the torsion measuring device for a catheter described in the embodiment of the first aspect of the present application, the torsion measuring device for a catheter also includes a grating disk, which is directly or indirectly fixed to the centering chuck, and the grating disk can rotate following the centering chuck, and the grating disk is used to record the rotation angle of the centering chuck.

[0012] According to an embodiment of the second aspect of the present application, a measurement method is provided, based on the above-mentioned torsion measurement device for a catheter, comprising the following steps: S1. Select the length of the catheter product to be tested, fix one of the centering chucks on one end of the catheter product, and fix the other centering chuck on the other end of the catheter product; S2. Adjust the positions of the two sets of clamping components until the catheter product is in a straightened state; S3, one of the centering chucks is twisted at a preset speed and a preset angle, and the other centering chuck is in a driven state; S4. Measure the actual rotation angles of the two centering chucks, and calculate the torque transmission efficiency based on the rotation angle difference between the two centering chucks.

[0013] According to the measurement method described in the embodiment of the second aspect of the present application, during the process of clamping the catheter product, an auxiliary pipe fitting is set in the lumen of the catheter product, and the auxiliary pipe fitting is gap-matched with the lumen wall of the catheter product. The length of the auxiliary pipe fitting is greater than the length of the centering chuck for clamping the catheter.

[0014] According to an embodiment of the second aspect of the present application, a measurement method is provided, based on the above-mentioned torsion measurement device for a catheter, comprising the following steps: S1. Select the length of the catheter product to be tested, fix one of the centering chucks on one end of the catheter product, and fix the other centering chuck on the other end of the catheter product; S2. Adjust the positions of the two sets of clamping components until the catheter product is in a straightened state; S3, one of the centering chucks is twisted at a preset speed and a preset angle, and the other centering chuck is set to be unable to rotate; S4. Continuously rotating the rotatable centering chuck at a preset rotation speed until the catheter product is kinked, and recording the torsion angle and the location where the torsion occurs at the moment the catheter product is kinked; S5. The optical signal transmitting end transmits an optical signal from the torsion input end of the catheter product. The optical signal receiving end is set at the other end of the catheter product to receive the optical signal. The degree of kink is determined according to the signal received by the optical signal receiving end.

[0015] According to the measurement method described in the embodiment of the second aspect of the present application, during the process of clamping the catheter product, an auxiliary pipe fitting is set in the lumen of the catheter product, and the auxiliary pipe fitting is gap-matched with the lumen wall of the catheter product. The length of the auxiliary pipe fitting is greater than the length of the centering chuck for clamping the catheter.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present application is further described below with reference to the accompanying drawings and embodiments; Figure 1 is a schematic diagram of a catheter product according to an embodiment of the present application being in a blood vessel; Figure 2 This is a cross-sectional diagram of a catheter product in an embodiment of the present application. Figure 1 ; Figure 3 This is a cross-sectional diagram of a catheter product in an embodiment of the present application. Figure 2 ; Figure 4 1 is a schematic structural diagram of a torsion measurement device for a catheter in an embodiment of the present application; Figure 5 1 is a schematic structural diagram of a clamping assembly in an embodiment of the present application; Figure 6 is a schematic diagram of a clamping assembly clamping a catheter product in an embodiment of the present application; Figure 7 This is a schematic diagram of a torsion measurement device for a catheter for torsion testing in an embodiment of the present application. Figure 1 ; Figure 8 This is a schematic diagram of a torsion measurement device for a catheter for torsion testing in an embodiment of the present application. Figure 2 ; Figure 9 This is a schematic diagram of a torsion measurement device for a catheter for torsion testing in an embodiment of the present application. Figure 3 .

[0018] Figure numerals: test platform 100, slide rail 110, measuring member 120, clamping assembly 200, clamping seat 210, slide groove 211, centering chuck 220, clamping block 230, optical signal transmitting end 310, optical signal receiving end 320, catheter product 400, cavity 410, auxiliary pipe fitting 500. DETAILED DESCRIPTION

[0019] This section will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0020] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0021] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0022] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0023] Figure 1 This is a schematic diagram of the catheter product 400 in the blood vessel. For the catheter product 400 used in interventional treatment, it is generally inserted into the tortuous blood vessels of the human body for treatment. For some catheter products, after entering from the femoral artery or radial artery, during their travel, especially when the distal position gradually approaches the lesion site, the operator also needs to apply appropriate twisting thrust to proceed; in addition, some catheter products, especially those that need to have the effect of blood vessel restoration, also need to perform a certain degree of rotational grinding operation on the thrombus when approaching the lesion site. For example, it is hoped that the larger thrombus can be cut out with features such as cracks and broken edges to facilitate extraction or other means of removal. Therefore, in the torsion test, in addition to the torque transmission test, the extreme kink test is very necessary.

[0024] However, there is no related device in the prior art that can be used for torque transmission testing and extreme kink testing of the catheter product 400.

[0025] For this reason, Figure 4 As shown, an embodiment of the present application provides a torsion measurement device for a catheter, which can be used for torque transmission testing and extreme kink testing of a catheter product 400.

[0026] Specifically, the torsion measurement device for a catheter includes a test platform 100 , two sets of clamping assemblies 200 , and an optical signal unit.

[0027] The test platform 100 serves as the main reference key of the device, and the clamping assembly 200 and the optical signal unit are both arranged on the test platform 100 .

[0028] Two sets of clamping assemblies 200 are arranged on the test platform 100. The clamping assemblies 200 can slide on the test platform 100. When the force applied to the clamping assemblies 200 is greater than the friction force between the clamping assemblies 200 and the test platform 100, the position of the clamping assemblies 200 on the test platform 100 can be adjusted.

[0029] The distance between the two sets of clamping assemblies 200 is adjustable so that the position can be adjusted according to different catheter lengths. The clamping assembly 200 includes a centering clamp 220, which is used to clamp the end of the catheter product 400. The centering clamp 220 can rotate around its clamping center to facilitate the application of torque to the catheter product 400.

[0030] The optical signal unit includes an optical signal transmitter 310 and an optical signal receiver 320. The optical signal transmitter 310 interfaces with one end of a catheter secured by the clamp assembly 200, while the optical signal receiver interfaces with the other end of the catheter. The optical signal emitted by the optical signal transmitter 310 is transmitted through the catheter to the optical signal receiver 320. If the catheter product 400 is kinked, the amount of optical signal reaching the optical signal receiver 320 will be small, thus confirming whether the catheter product 400 is severely kinked.

[0031] When performing a torsion test on a catheter product 400, the end of the catheter is clamped and fixed by the centering chucks 220 of the two sets of clamping assemblies 200. The distance between the two sets of clamping assemblies 200 is adjusted to straighten the catheter product 400. When performing a torsion torque test, one set of centering chucks 220 is used as a torque input, while the other set of centering chucks 220 is not specifically restricted so that they can rotate when torque is applied. This facilitates measuring the torque transmission efficiency of the current catheter product 400 and provides a reliable torsion reference for customers. When performing a kink test, one set of centering chucks 220 is used as a torque input, while the other set of centering chucks 220 is set to be unable to rotate. Torque is gradually input so that kink-related data of the current catheter product 400 can be observed and measured, making it convenient to measure the torque that causes extreme kinking. In conjunction with the optical signal unit, extreme kink data can be tested.

[0032] The torsion measurement device structure for a catheter of the present application can more conveniently conduct torque transmission efficiency and kink extreme experiments on the catheter product 400. The testing process is simple, and the obtained measurement data is reliable. The measured data can provide a reliable reference for subsequent use of the catheter product 400.

[0033] In some embodiments, the centering chuck 220 includes at least two clamping blocks 230 , which are distributed in a circular array around the central axis of the centering chuck 220 , and all the clamping blocks 230 can synchronously move toward or away from the central axis of the centering chuck 220 .

[0034] like Figure 5 As shown, the centering joint of the embodiment of the present application includes three clamping blocks 230. The three clamping blocks 230 can clamp the end of the catheter product 400 more stably to ensure that the end of the catheter product 400 does not slip during the twisting process.

[0035] In some specific embodiments, the central axes of the centering chucks 220 of the two clamping assemblies 200 are aligned, and the centering chucks 220 may be provided with an adjustment structure for driving the three clamping blocks 230 to move synchronously. The adjustment structure may be a worm gear adjustment, such as a three-jaw chuck, or a rotational locking structure, such as that used in a milling machine clamping head.

[0036] In some embodiments, the clamping assembly 200 includes a clamping seat 210 , and the clamping seat 210 is connected to the test platform 100 via a sliding structure so that the linear distance between the two sets of clamping assemblies 200 is adjustable.

[0037] The sliding structure includes a slide groove 211 and a slide rail 110 that can cooperate with each other, wherein the test platform 100 is provided with a slide rail 110, and the clamping seat 210 is provided with a slide groove 211. The cooperation between the slide groove 211 and the slide rail 110 enables the clamping seat 210 to slide on the test platform 100.

[0038] In some other embodiments, the test platform 100 is provided with a slide groove 211 , and the clamping seat 210 is provided with a slide rail 110 . The clamping seat 210 can slide on the test platform 100 through the cooperation between the slide groove 211 and the slide rail 110 .

[0039] The centering chuck 220 is a cylindrical structure, and the centering chuck 220 is rotatably set on the clamping seat 210. In order to facilitate the controllable rotation of the centering chuck 220, some locking structures can be set on the clamping seat 210. The locking structure can limit the rotation of the centering chuck 220, thereby facilitating the control of the rotation angle of the centering chuck 220.

[0040] The locking structure may be a screw, and the clamping seat 210 is provided with a channel for the centering chuck 220 to rotate. The screw can enter the channel to pre-press the centering chuck 220 , thereby limiting the rotation of the centering chuck 220 .

[0041] In some embodiments, a measuring member 120 is provided on the testing platform 100. The measuring member 120 is parallel to the line connecting the two centering clamps 220. The measuring member 120 is used to observe the relative position, size, and torsion range of the catheter product 400. The measuring member 120 may be a ruler with the smallest unit of scale being millimeters. The measuring member 120 allows for a more intuitive observation of the position and range of torsion of the catheter product 400.

[0042] In some embodiments, the catheter torsion measurement device further includes a grating disk, which is directly or indirectly fixed to the centering chuck 220. The grating disk can rotate with the centering chuck 220 and is used to record the rotation angle of the centering chuck 220. The grating disk can accurately measure the rotation angle of the centering chuck 220.

[0043] In some embodiments of the present application, Figures 7 to 9 As shown, a method for measuring the torsion of a catheter product 400 is also provided. The method is based on the above-mentioned torsion measuring device for a catheter and specifically includes the following steps: S1. Select the length of the catheter product 400 to be tested, fix one of the centering chucks 220 to one end of the catheter product 400, and fix the other end of the catheter product 400 to the other centering chuck 220; S2. Adjust the positions of the two sets of clamping assemblies 200 until the catheter product 400 is in a straightened state, so that the clamping assemblies 200 are parked and locked in position, and also prevent the clamping assemblies 200 from being displaced and affecting the test process during the test; S3. One of the centering chucks 220 is twisted at a preset speed and a preset angle to provide a rated torque to one end of the catheter product 400, while the other centering chuck 220 is in a driven state and can perform a corresponding driven rotation according to the transmitted torque. S4. When the centering chuck 220 serving as the input end rotates to a preset angle, the current centering chuck 220 is locked, and the actual rotation angles of the two centering chucks 220 are measured. The torque transmission efficiency is calculated based on the rotation angle difference between the two centering chucks 220.

[0044] If a grating disk is provided on the centering chuck 220, the rotation angle of the centering chuck 220 can be read more intuitively, and then the readings of the two grating disks are subtracted to obtain the torsion angle difference. The obtained torsion angle difference is the angle delay (hysteresis) value of the torsional force transmission process.

[0045] In some embodiments, such as Figure 6 As shown, during the process of clamping the catheter product 400, an auxiliary pipe fitting 500 is set in the cavity 410 of the catheter product 400. The auxiliary pipe fitting 500 is matched with the wall gap of the cavity 410 of the catheter product 400, and the length of the auxiliary pipe fitting 500 is greater than the length of the centering clamp 220 for clamping the catheter.

[0046] The auxiliary tube 500 serves to provide a support for the clamping block 230 of the clamping assembly 200. During clamping, it is inserted into the section of the catheter being tested. To minimize the impact on the measurement results, the length of the auxiliary tube 500 is designed to be equal to or slightly greater than the axial length of the clamping assembly 200. It should be noted that the auxiliary tubes 500 are installed at both ends of the catheter product 400. Since medical catheters are generally of standard dimensions, such as 4F, 5F, or 6F inner diameters, the auxiliary tube 500, used to abut against the inner wall, only needs to be cut out after the catheter product to be tested is determined to assist in the measurement and testing process.

[0047] Assume that the unit length of the pipe to be tested is L, and the value of L can be 1 meter; Assume the inner diameter of the pipe to be tested is D1. According to common knowledge in the art, the inner diameter unit of medical catheters is "F". For details, you can search "the specific meaning of the medical catheter diameter unit F" on Baidu. The general range is 4F, 5F, and 6F. F is the unit of inner diameter. According to the conversion rule, 1F ≈ 0.33mm. 4F, 5F, and 6F are all specific and clear.

[0048] Assume that the outer diameter of the pipe to be tested is D2 (usually, the range of this parameter is not set, but "D2-D1" is the wall thickness of the pipe to be tested, which is generally in the range of 0.15-0.25mm; The auxiliary test pipe used to support the inner wall is actually an auxiliary pipe 500 pre-cut according to the established test plan to be suitable for the pipe diameters of 4F, 5F, and 6F.

[0049] In some embodiments, the kink test measurement method of the present application includes the following steps: S1. Select the length of the catheter product 400 to be tested, fix one of the centering chucks 220 to one end of the catheter product 400, and fix the other end of the catheter product 400 to the other centering chuck 220; S2. Adjust the positions of the two sets of clamping assemblies 200 until the catheter product 400 is in a straightened state, so that the clamping assemblies 200 are parked and locked in position, and also prevent the clamping assemblies 200 from being displaced and affecting the test process during the test; S3. One of the centering chucks 220 is twisted at a preset speed and a preset angle to provide a rated torque to one end of the catheter product 400, and the other centering chuck 220 is set to be unable to rotate to facilitate the kink test; S4. Continuously rotate the rotatable centering chuck 220 at a preset rotation speed until the catheter product 400 kinks (i.e., gradually increases twisting). Record the twist angle at the moment the catheter product 400 kinks (this is the maximum twisting extreme angle; the catheter product 400 will be unusable if it exceeds this angle) and the location where the twisting occurs (using the end of the catheter product 400 near the optical signal transmitting end 310 as a measurement reference, measuring the kinking limit for a certain length of the catheter and the length of the kinking location relative to the measurement reference). S5. During the twisting process, the optical signal unit is in operation. The optical signal transmitting end 310 transmits an optical signal from the twisting input end of the catheter product 400. The optical signal receiving end 320, which is provided at the other end of the catheter product 400, receives the optical signal. The degree of kinking is determined based on the amount of signal received by the optical signal receiving end 320. If the amount of signal received by the optical signal receiving end 320 is 30% of the amount transmitted by the optical signal generating end, it can be determined that the catheter product 400 has obvious kinking.

[0050] It should be noted that the locations where kinks occur vary significantly for catheter products 400 made of different materials. If the tubing is made of more than one material, especially when it is molded with stepped or continuously gradient materials, it is often necessary to measure the kink limit and calculate the relative locations where kinks are most likely to occur.

[0051] In some embodiments, the catheter product 400 includes a medical catheter with multiple lumens 410. For such catheter products 400, kink extreme tests are more required, such as Figure 2 and Figure 3As shown, a catheter product 400 with multiple lumens 410 generally includes a main lumen 410 and smaller peripheral lumens 410. The specifications of the auxiliary testing tube used to abut the inner wall are generally tailored to the inner diameter of the product's main lumen 410. The bypass lumen 410 may not be abutted, and the bypass lumen 410 may be designed with one, two, or even multiple lumens. This type of catheter product 400 is well-established in the art. However, no specific testing methods or equipment for this type of multi-lumen 410 medical catheter product 400 have been disclosed. During the testing process for this type of catheter product 400, the auxiliary abutment tube can simply be a small tube smaller than the main lumen of the product and inserted into the appropriate position. Alternatively, if it is considered that the bypass lumen itself strengthens the entire catheter to a certain extent, it can be directly omitted and the clamping assembly 200 can be directly clamped for testing; the catheter product 400 with multiple lumens 410 with similar apertures has a certain internal supporting force and is generally not used for grinding thrombus, so the above extreme test is not performed.

[0052] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A torsion measurement device for a catheter, characterized in that: include test platform; Two sets of clamping assemblies are arranged on the test platform, the distance between the two sets of clamping assemblies is adjustable, and the clamping assemblies include a centering chuck, which is used to clamp the end of the catheter product and can rotate around its clamping center; The optical signal unit comprises an optical signal transmitting end and an optical signal receiving end. The optical signal transmitting end is connected to one end of the catheter fixed by the clamping assembly, and the optical signal receiving end is connected to the other end of the catheter.

2. The torsion measurement device for a catheter according to claim 1, characterized in that: The centering chuck includes at least two clamping blocks, which are distributed in a circular array with the central axis of the centering chuck as the center. All the clamping blocks can synchronously move toward or away from the central axis of the centering chuck.

3. The torsion measurement device for a catheter according to claim 1, characterized in that: The clamping assembly includes a clamping seat, and the clamping seat is connected to the test platform via a sliding structure so that the linear distance between the two groups of the clamping assemblies is adjustable.

4. The torsion measurement device for a catheter according to claim 3, characterized in that: The sliding structure includes a slide groove and a slide rail that can cooperate with each other, wherein the test platform is provided with the slide rail, and the clamping seat is provided with the slide groove; or the test platform is provided with the slide groove, and the clamping seat is provided with the slide rail.

5. The torsion measurement device for a catheter according to claim 1, characterized in that: The test platform is provided with a measuring component, which is parallel to the line connecting the two centering clamps. The measuring component is used to observe the relative position size and torsional range of the catheter product.

6. The torsion measurement device for a catheter according to claim 1, characterized in that: The torsion measuring device for a catheter further comprises a grating disk, which is directly or indirectly fixed to the centering chuck. The grating disk can rotate along with the centering chuck, and is used to record the rotation angle of the centering chuck.

7. A measurement method, based on the torsion measurement device for a catheter according to any one of claims 1 to 6, characterized in that: The steps include: S1. Select the length of the catheter product to be tested, fix one of the centering chucks on one end of the catheter product, and fix the other centering chuck on the other end of the catheter product; S2. Adjust the positions of the two sets of clamping components until the catheter product is in a straightened state; S3, one of the centering chucks is twisted at a preset speed and a preset angle, and the other centering chuck is in a driven state; S4. Measure the actual rotation angles of the two centering chucks, and calculate the torque transmission efficiency based on the rotation angle difference between the two centering chucks.

8. The measuring method according to claim 7, wherein: During the process of clamping the catheter product, an auxiliary pipe is set in the cavity of the catheter product. The auxiliary pipe is loosely matched with the cavity wall of the catheter product. The length of the auxiliary pipe is greater than the length of the centering clamp for clamping the catheter.

9. A measurement method, based on the torsion measurement device for a catheter according to any one of claims 1 to 6, characterized in that: The steps include: S1. Select the length of the catheter product to be tested, fix one of the centering chucks on one end of the catheter product, and fix the other centering chuck on the other end of the catheter product; S2. Adjust the positions of the two sets of clamping components until the catheter product is in a straightened state; S3, one of the centering chucks is twisted at a preset speed and a preset angle, and the other centering chuck is set to be unable to rotate; S4. Continuously rotating the rotatable centering chuck at a preset rotation speed until the catheter product is kinked, and recording the torsion angle and the location where the torsion occurs at the moment the catheter product is kinked; S5. The optical signal transmitting end transmits an optical signal from the torsion input end of the catheter product. The optical signal receiving end is set at the other end of the catheter product to receive the optical signal. The degree of kink is determined according to the signal received by the optical signal receiving end.

10. The measuring method according to claim 9, characterized in that: During the process of clamping the catheter product, an auxiliary pipe is set in the cavity of the catheter product. The auxiliary pipe is loosely matched with the cavity wall of the catheter product. The length of the auxiliary pipe is greater than the length of the centering clamp for clamping the catheter.

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