A device for measuring artificial vessel / stent torsional force and a method of using the same

Abstract

The application provides a device for measuring artificial blood vessel / stent torsional force and a use method thereof, and belongs to the technical field of blood vessel / stent torsional force testing; the technical problem to be solved is to provide an improved device structure for measuring artificial blood vessel / stent torsional force; the technical solution for solving the above technical problem is that a whole support frame is arranged, two sides of the whole support frame are respectively provided with trolleys, first fixed pulleys are fixed on the trolleys, second fixed pulleys are arranged on vertical beams of the two sides of the whole support frame, the trolleys on the two sides are connected through a moving cross beam, a sleeve is fixed on the moving cross beam, a first fixing assembly is fixed on the sleeve, a second fixing assembly is arranged below the first fixing assembly, the second fixing assembly is placed on a double-shaft experimental tensile machine, and a triangular heightener is placed on the double-shaft experimental tensile machine; the application is applied to blood vessel / stent torsional force testing.

Description

Technical Field

[0001] This invention provides a device for measuring the torsional force of artificial blood vessels / stents and its usage method, belonging to the technical field of blood vessel / stent measurement devices. Background Technology

[0002] After implantation, the complex dynamic mechanical environment within the human body significantly impacts the successful placement of stents or artificial blood vessels. Because the location of vascular diseases varies, the required stent / artificial blood vessel sizes differ, necessitating a device capable of measuring the torsional, bending, and other mechanical properties of tubular materials of varying sizes. Ideally, stents or artificial blood vessels should be able to adapt to the stretching / compression, bending, and torsion caused by limb movement. Traditional methods for measuring vascular stents / artificial blood vessels involve simple, quasi-static, one-dimensional stretching, bending, compression, and torsion. Current methods and devices for measuring torsional force suffer from low accuracy and cannot simulate the complex physiological environment of human blood vessels. Therefore, this invention proposes a device for measuring the torsional force of artificial blood vessels / stents. This device utilizes 3D-printed parts of different sizes to fix tubular materials of varying dimensions, thereby achieving the purpose of measuring the torsional force of tubular materials of different sizes. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention aims to solve the technical problem of providing an improved device structure for measuring the torsional force of artificial blood vessels / stents.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a device for measuring the torsional force of artificial blood vessels / stents, comprising an integral support frame, trolleys respectively arranged on both sides of the integral support frame, a first fixed pulley fixed on the trolley, a second fixed pulley respectively on the vertical beams on both sides of the integral support frame, the trolleys on both sides being connected by a movable crossbeam, a sleeve fixed on the movable crossbeam, a first fixing component fixed on the sleeve, a second fixing component arranged below the first fixing component, the second fixing component being placed on a biaxial tensile testing machine, and a triangular height increaser placed on the biaxial tensile testing machine.

[0005] The sleeve is specifically a transparent sleeve, and a camera of a biaxial tensile testing machine is installed above the transparent sleeve.

[0006] The first fixing component includes a bearing fixing shaft, which is fixed on a sleeve. A bearing is sleeved on the bearing fixing shaft, and a bearing washer is provided between the bearing and the bearing fixing shaft. A first sample fixing shaft is provided extending from the end of the bearing.

[0007] The second fixing component includes a fixing bracket, on which a second sample fixing shaft is provided.

[0008] The first sample fixing shaft is provided with multiple small holes for threading.

[0009] The second sample fixing shaft is provided with multiple small holes for threading.

[0010] The bearing is provided with a rope fixing groove, and the top of the bearing is provided with a scale.

[0011] A method of using a device for measuring the torsional force of an artificial blood vessel / stent, comprising the following steps:

[0012] The upper end of the tubular sample is fixed to the first sample fixing shaft through a small hole on the first sample fixing shaft using surgical suture. Similarly, the lower end of the tubular sample is fixed to the second sample fixing shaft through a small hole on the second sample fixing shaft using surgical suture.

[0013] Connect the triangular height increaser to the clamping system and rope of the biaxial experimental tensile machine. The rope is connected to the top of the triangular height increaser and two sets of fixed pulleys, and finally wound around the rope fixing groove.

[0014] Once the tubular sample and the string are fixed, the biaxial tensile testing machine is started. The clamping system begins to apply force with the specified parameters. The upper bearing of the sample begins to rotate, which drives the first sample fixing shaft to rotate. The tubular sample fixed on the first sample fixing shaft also rotates, while the lower end remains fixed, thus achieving the torsion of the tubular material.

[0015] The height of the crossbeam is adjusted by a trolley, thereby adjusting the height of the first sample fixing axis to accommodate measurements of tubular samples of different lengths.

[0016] Adjust the height of one side of the pulley so that the sleeve is in an inclined state;

[0017] When the blood vessel / artificial blood vessel / vascular stent is fixed on the first sample fixing axis and the second sample fixing axis, the tubular material is in a bent state, and then a torsion test is performed in the bent state.

[0018] The first and second sample fixing shafts can be replaced with shafts of different diameters to accommodate the testing of tubular samples of different diameters.

[0019] The beneficial effects of this invention compared to the prior art are as follows: The device for measuring the torsional force of artificial blood vessels / stents provided by this invention can be used in conjunction with a biotester, which not only allows for precise observation and measurement in mechanics, obtaining accurate and clear data and images; at the same time, it can change the previous quasi-static test and measure in a dynamic way, which is closer to the mechanical environment of the real human body, making the data more real and reliable. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a front view of the support frame of the device of the present invention;

[0023] Figure 3 for Figure 2 The left view;

[0024] Figure 4 for Figure 2 Top view;

[0025] Figure 5 This is a schematic diagram of the structure of the first fixing component of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the second fixing component of the present invention;

[0027] Figure 7 A schematic diagram of the structure for performing vascular torsion tests using the device of the invention in combination with a biaxial experimental tensile tester;

[0028] In the diagram: 1 is the overall support frame, 2 is the sleeve, 3 is the pulley, 4 is the first fixed pulley, 5 is the second fixed pulley, 6 is the triangular height increaser, 7 is the crossbeam, 8 is the movable crossbeam, 9 is the vertical beam, 10 is the connecting plate, 11 is the roller, 12 is the first fixed component, 13 is the second fixed component, 14 is the fixed beam, and 15 is the biaxial tensile testing machine.

[0029] 121 is the bearing fixing shaft, 122 is the bearing washer, 123 is the bearing, 124 is the rope fixing groove, 125 is the first sample fixing shaft, 131 is the second sample fixing shaft, and 132 is the fixing bracket. Detailed Implementation

[0030] like Figures 1 to 7 As shown, the present invention discloses a device for measuring the torsional force of artificial blood vessels / stents, comprising an integral support frame 1, with trolleys 3 respectively arranged on both sides of the integral support frame 1, a first fixed pulley 4 fixed on the trolley 3, and a second fixed pulley 5 respectively on the vertical beams 9 on both sides of the integral support frame 1. The trolleys 3 on both sides are connected by a movable crossbeam 8, a sleeve 2 fixed on the movable crossbeam 8, a first fixing component 12 fixed on the sleeve 2, a second fixing component 13 arranged below the first fixing component 12, the second fixing component 13 placed on a biaxial experimental tensile testing machine 15, and a triangular height increaser 6 placed on the biaxial experimental tensile testing machine 15.

[0031] The sleeve 2 is specifically a transparent sleeve, and a camera of the biaxial tensile testing machine 15 is installed above the transparent sleeve.

[0032] The first fixing component 12 includes a bearing fixing shaft 121, which is fixed on the sleeve 2. A bearing 123 is sleeved on the bearing fixing shaft 121, and a bearing pad 122 is provided between the bearing 123 and the bearing fixing shaft 121. A first sample fixing shaft 125 extends from the end of the bearing 121.

[0033] The second fixing component 13 includes a fixing bracket 132, on which a second sample fixing shaft 131 is provided.

[0034] The first sample fixing shaft 125 is provided with a plurality of small holes for threading.

[0035] The second sample fixing shaft 131 is provided with multiple small holes for threading.

[0036] The bearing 123 is provided with a rope fixing groove 124, and the top of the bearing 123 is provided with a scale.

[0037] A method of using a device for measuring the torsional force of an artificial blood vessel / stent, comprising the following steps:

[0038] The upper end of the tubular sample is fixed to the first sample fixing shaft 125 through a small hole in the first sample fixing shaft 125 using surgical suture. Similarly, the lower end of the tubular sample is fixed to the second sample fixing shaft 131 through a small hole in the second sample fixing shaft 131 using surgical suture.

[0039] The triangular height increaser 6 is connected to the clamping system and rope of the biaxial experimental tensile machine 15. The rope is connected to the top of the triangular height increaser 6 and two sets of fixed pulleys, and finally wound around the rope fixing groove 124.

[0040] When the tubular sample and the string are fixed, the biaxial tensile testing machine 15 is started. The clamping system begins to apply force with the specified parameters. The upper bearing 123 of the sample begins to rotate, which drives the first sample fixing shaft 125 to rotate. The tubular sample fixed on the first sample fixing shaft 125 also rotates, while the lower end remains fixed, thus achieving the torsion of the tubular material.

[0041] The height of the crossbeam can be adjusted by the trolley 3, thereby adjusting the height of the first sample fixing shaft 125 to accommodate the measurement of tubular samples of different lengths.

[0042] Adjust the height of one side of the pulley 3 so that the sleeve 2 is in an inclined state;

[0043] When the blood vessel / artificial blood vessel / vascular stent is fixed on the first sample fixing shaft 125 and the second sample fixing shaft 131, the tubular material is in a bent state, and then a torsion test is performed in the bent state.

[0044] The first sample fixing shaft 125 and the second sample fixing shaft 131 can be replaced with shafts of different diameters to accommodate the testing of tubular samples of different diameters.

[0045] The device for measuring the torsional force of artificial blood vessels / stents provided by this invention mainly consists of an integral support frame 1 made of aluminum profiles. The integral support frame 1 includes two aluminum profile crossbeams 7 at the top and two aluminum profile vertical beams 9 on each side. The two aluminum profile crossbeams 7 at the top are fixed to each other by aluminum profile fixing beams 14 on both sides. The fixing beams can be placed on top or bottom to fix the crossbeams 7. The two aluminum profile vertical beams 9 on each side are connected by a trolley 3, and a movable crossbeam 8 is fixedly connected between the trolleys 3 on both sides. The trolley 3 includes... Two connecting plates 10 are provided, each with four rollers 11 fixed on it. The four rollers 11 are rotatably connected in the groove of the aluminum profile vertical beam 9. A movable crossbeam 8 is fixed between the two connecting plates 10. A first fixed pulley 4 is fixed on one of the connecting plates 10 of each trolley 3, and a second fixed pulley 5 is fixed on the aluminum profile vertical beam 9 below the trolley 3. The second fixed pulleys 5 are staggered on the aluminum profile vertical beams 9 on both sides. For example, the second fixed pulley 5 of the left aluminum profile vertical beam 9 is fixed on the left vertical beam, and the second fixed pulley 5 of the right aluminum profile vertical beam 9 is fixed on the right vertical beam.

[0046] The device of this invention is used to achieve precise torsional mechanics analysis of human blood vessels / artificial blood vessels / vascular stents of different scales (length / diameter). In use, the upper end of the tubular sample is fixed to the first sample fixing shaft 125, secured with surgical suture through a small hole on the first sample fixing shaft 125. Similarly, the lower end of the tubular sample is fixed to the second sample fixing shaft 131 in the same way. A triangular extension device 6 connects the clamping system and the rope of a biaxial experimental tensile testing biotester. The rope connects to the top of the triangular extension device 6, and to two sets of fixed pulleys: the first fixed pulley 4 and the second fixed pulley 5. Finally, it is wound around the rope fixing groove 124. When the tubular sample and the rope are fixed, the biotester machine is started, and the clamping system begins to apply force according to specified parameters. The bearing 123 at the upper end of the sample begins to rotate, causing the first sample fixing shaft 125 to rotate. The tubular sample fixed to the first sample fixing shaft 125 also rotates accordingly, while the lower end remains stationary, thus achieving torsion of the tubular material.

[0047] The sleeve 2 of this invention is a transparent tube sleeve, and the bearing 123 has graduations engraved on its top. The changes in the graduations on the bearing during torsion can be clearly observed using the camera built into the biaxial tensile testing biotester. The trolley 3 can adjust the height of the bearing fixing shaft 121, thereby adjusting the height of the first sample fixing shaft 125 to accommodate measurements of tubular samples of different lengths. The first sample fixing shaft 125 and the second sample fixing shaft 131 can be replaced with shafts of different diameters to accommodate the testing of tubular samples of different diameters.

[0048] This invention uses rollers 11 on trolleys 3 of vertical beams 9 on both sides to connect thin ropes. The tension of the ropes by a biaxial tensile testing machine 15 drives the bearing 123 to rotate, which in turn causes the upper end of the blood vessel / stent to twist, while the lower end of the blood vessel / stent remains fixed. An angle is marked on the outer periphery of the bearing 123, and the rotation angle can be observed via a camera built into the biaxial tensile testing machine 15. The degree of twisting of the tubular material can be precisely controlled by adjusting the tension of the biaxial tensile testing machine 15. The parts for fixing the upper and lower ends of the blood vessel / stent are available in various sizes to accommodate tubular materials of different diameters. The height of the upper fixing position can be adjusted on the side of the device to accommodate tubular materials of different lengths.

[0049] This device can also test the torsional mechanical properties of human blood vessels / artificial blood vessels / vascular stents under bending conditions. Blood vessels operate in a complex mechanical environment, often simultaneously undergoing bending and torsional forces. Simulating this complex state of human blood vessels / artificial blood vessels / vascular stents and testing the torsional mechanics of tubular materials under bending conditions is of great significance, enabling multi-dimensional evaluation of the blood vessel's condition and the performance of artificial blood vessels and vascular stents. The specific testing steps are as follows: Adjust the height of one side of the pulley 3 so that the sleeve 2 is tilted. The tilt angle of the sleeve 2 depends on the degree of adjustment of the pulley 3 and can be adjusted to different angles. The tilt of the sleeve 2 causes the first sample fixing shaft 125 to have a certain tilt angle. When the human blood vessel / artificial blood vessel / vascular stent is fixed on the first sample fixing shaft 125 and the second sample fixing shaft 131, the tubular material is in a bending state due to the fixation of the first sample fixing shaft 125 and the second sample fixing shaft 131, and then a torsional experiment is performed in this bending state.

[0050] Regarding the specific structure of this invention, it should be noted that the connection relationships between the various components and modules used in this invention are definite and achievable. Except as specifically described in the embodiments, their specific connection relationships can bring about corresponding technical effects and solve the technical problems proposed by this invention without relying on the execution of corresponding software programs. Unless otherwise specifically described, the models and connection methods of the components, modules, and specific parts appearing in this invention are all prior art such as published patents, published journal articles, or common knowledge that can be obtained by those skilled in the art before the application date, and need not be elaborated. This makes the technical solution provided in this case clear, complete, and achievable, and can reproduce or obtain the corresponding physical product based on this technical means.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for measuring the torsional force of an artificial blood vessel / stent, characterized in that: The system includes an overall support frame, with trolleys on both sides of the frame. A first fixed pulley is fixed on each trolley, and a second fixed pulley is fixed on each of the vertical beams on both sides of the frame. The trolleys on both sides are connected by a movable crossbeam. A sleeve is fixed on the movable crossbeam, and a first fixing component is fixed on the sleeve. A second fixing component is located below the first fixing component and is placed on a biaxial tensile testing machine. A triangular height increaser is placed on the biaxial tensile testing machine. The triangular height increaser is used to connect the clamping system and rope of the biaxial tensile testing machine. The rope connects to the top of the triangular height increaser and the two sets of fixed pulleys (the first and second fixed pulleys), and is finally wound around the rope fixing groove. The first fixing component includes a bearing fixing shaft, which is fixed on a sleeve. A bearing is sleeved on the bearing fixing shaft, and a bearing washer is provided between the bearing and the bearing fixing shaft. A first sample fixing shaft extends from the end of the bearing. The second fixing component includes a fixing bracket, on which a second sample fixing shaft is provided; Adjust the height of one side of the trolley so that the sleeve is tilted. The tilt of the sleeve causes the first sample fixing shaft to have a certain tilt angle. When the human blood vessel / artificial blood vessel / vascular stent is fixed on the first sample fixing shaft and the second sample fixing shaft, the tubular material is in a bent state due to the fixation of the first sample fixing shaft and the second sample fixing shaft. Then, a torsion test is performed in the bent state.

2. The device for measuring the torsional force of artificial blood vessels / stents according to claim 1, characterized in that: The sleeve is specifically a transparent sleeve, and a camera of a biaxial tensile testing machine is installed above the transparent sleeve.

3. The device for measuring the torsional force of artificial blood vessels / stents according to claim 1, characterized in that: The first sample fixing shaft is provided with multiple small holes for threading.

4. The device for measuring the torsional force of artificial blood vessels / stents according to claim 1, characterized in that: The second sample fixing shaft is provided with multiple small holes for threading.

5. The device for measuring the torsional force of artificial blood vessels / stents according to claim 1, characterized in that: The bearing has a scale at its top.

6. A method of using a device for measuring the torsional force of an artificial blood vessel / stent, comprising using the device for measuring the torsional force of an artificial blood vessel / stent as described in any one of claims 3-4, characterized in that: Includes the following steps: The upper end of the tubular sample is fixed to the first sample fixing shaft through a small hole on the first sample fixing shaft using surgical suture. Similarly, the lower end of the tubular sample is fixed to the second sample fixing shaft through a small hole on the second sample fixing shaft using surgical suture. Connect the triangular height increaser to the clamping system and rope of the biaxial experimental tensile machine. The rope is connected to the top of the triangular height increaser and two sets of fixed pulleys, and finally wound around the rope fixing groove. Once the tubular sample and the string are fixed, the biaxial tensile testing machine is started. The clamping system begins to apply force with the specified parameters. The upper bearing of the sample begins to rotate, which drives the first sample fixing shaft to rotate. The tubular sample fixed on the first sample fixing shaft also rotates, while the lower end remains fixed, thus achieving the torsion of the tubular material. The height of the crossbeam is adjusted by the trolley, thereby adjusting the height of the first sample fixing axis to accommodate the measurement of tubular samples of different lengths. Adjust the height of one side of the pulley so that the sleeve is in an inclined state; When the blood vessel / artificial blood vessel / vascular stent is fixed on the first sample fixing axis and the second sample fixing axis, the tubular material is in a bent state, and then a torsion test is performed in the bent state.

7. A method of using the device for measuring the torsional force of an artificial blood vessel / stent according to claim 6, characterized in that: The first and second sample fixing shafts can be replaced with shafts of different diameters to accommodate the testing of tubular samples of different diameters.

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