Support device, test system and method for testing the performance of a vascular stent

Abstract

The present application relates to the technical field of medical instrument testing, more particularly to a support device for vascular stent performance test, a test system and a method. The present application provides a support device for vascular stent performance test, comprising: a support seat, a plurality of support bone joint blocks. The present application can realize multi-degree-of-freedom adjustment on the support seat through the support unit and the support bone joint blocks, and can adapt to different distributed vascular shapes through the space structure of the vascular model being similar to that in the human body, thereby enhancing the reliability and authenticity of the vascular stent test. The present application can better simulate the state of the blood vessels being wrapped by the muscles in the human body through the tubular air film, thereby optimizing the test results. The present application solves the problems of huge cost consumption and easy occurrence of central collapse of the vascular model in the prior art test by simulating the vascular shape one by one through 3D printing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical device testing, in particular to: 1, a support device for vascular stent performance test; 2, a vascular stent performance test system based on the support device; 3, a method for using the vascular stent performance test system. BACKGROUND

[0002] Aortic dissection is a very dangerous cardiovascular disease. In traditional surgical procedures, deep hypothermic circulatory arrest technology must be used to perform total arch replacement of the aortic arch. The surgery is extremely complex and difficult, often lasting ten hours or more, and is even more difficult than heart transplantation surgery. The minimally invasive surgery using a vascular covered stent can greatly solve the problems of traditional surgery.

[0003] In recent years, many new types of vascular stent structures and new materials have appeared at home and abroad. However, new vascular stents cannot be directly used in surgery and need to be tested for performance. In order to achieve better therapeutic effect, various types of tests need to be performed.

[0004] The normal method in the prior art is to implant the vascular stent to be tested into an animal body for animal experiments, but this will consume a lot of manpower, financial resources and material resources. Due to the complexity of the in-vivo environment, direct use of animal experiments can easily cause significant harm to animals and has a high mortality rate.

[0005] Therefore, the inventor designs a support device for vascular stent performance test to support the vascular model. A vascular stent performance test system and a method for using the same are also designed to simulate the in-vivo environment, which can more conveniently, quickly and reliably preliminarily evaluate the performance of the vascular stent.

[0006] Therefore, the inventor designs a support device for vascular stent performance test to support the vascular model. A vascular stent performance test system and a method for using the same are also designed to simulate the in-vivo environment, which can more conveniently, quickly and reliably preliminarily evaluate the performance of the vascular stent. SUMMARY

[0007] Therefore, the inventor designs a support device for vascular stent performance test to support the vascular model. A vascular stent performance test system and a method for using the same are also designed to simulate the in-vivo environment, which can more conveniently, quickly and reliably preliminarily evaluate the performance of the vascular stent.

[0008] The present application adopts the following technical solutions:

[0009] In a first aspect, the present application provides a support device for testing the performance of a vascular stent, comprising: a support seat and a plurality of support bone blocks. The support bone blocks are detachably connected to the support seat through support units. Transition bone blocks are connected between adjacent support bone blocks. The plurality of support bone blocks and transition bone blocks form a multi-joint chain for supporting a vascular model. The vascular model has a side wall with a breach. The vascular model has a to-be-tested vascular stent arranged therein, and the to-be-tested vascular stent seals the breach from the inside. The vascular model is arranged in a tubular air film. The tubular air film is arranged on the multi-joint chain.

[0010] The support seat has a plurality of positioning holes arranged in an array. The support unit comprises a mounting plate, a fixed rack, a movable rack, and a movable gear. The bottom surface of the mounting plate is provided with a plug rod for plugging the positioning holes. The fixed rack is arranged on one side of the top surface of the mounting plate. The movable rack is arranged on the other side of the top surface of the mounting plate and is arranged in parallel with the fixed rack. The movable gear is arranged on the top surface of the mounting plate between the fixed rack and the movable rack and is engaged with the fixed rack and the movable rack. The support bone block is located above the movable gear. An adjustable adjusting mechanism is connected between the movable gear and the support bone block for adjusting the orientation of the support bone block. A positioning mechanism is used to change the position of the movable gear by adjusting the movement or fixation of the movable rack.

[0011] The support device for testing the performance of a vascular stent realizes the method or process according to the embodiments of the present application.

[0012] In a second aspect, the present application provides a vascular stent performance test system, comprising: a support device for testing the performance of a vascular stent as disclosed in the first aspect, a liquid circulation assembly, a flow sensor, and a pressure sensor.

[0013] The liquid circulation assembly is used to circulate liquid into the vascular model. The flow sensor is used to measure the flow rate in the vascular model. The pressure sensor is used to measure the pressure change in the vascular model.

[0014] The vascular stent performance test system realizes the method or process according to the embodiments of the present application.

[0015] In a third aspect, the present application discloses a method for using the vascular stent performance test system of the second aspect, comprising the following steps:

[0016] S1, a vascular model with a side wall having a breach is obtained. First, a to-be-tested vascular stent is loaded into the vascular model, so that the to-be-tested vascular stent seals the breach from the inside. Then, the vascular model is sleeved into a tubular air film. The tubular air film is inflated to completely wrap the vascular model.

[0017] S2, adjust the position of the support unit on the support base so that the multi-joint chain is close to the blood vessel in the CT image, and then buckle the tubular air film into the semicircular groove of the multi-joint chain;

[0018] S3, fine-tune the support bone block of the support unit in the plane position through the positioning mechanism, and adjust the height of the support bone block of the support unit through the positioning nut, so that the overall curve of the multi-joint chain tends to be smooth.

[0019] S4, first heat the liquid in the water bath heating pot to the set temperature, start the pump to circulate the liquid through the liquid circulation assembly, and control the flow into the blood vessel model to the set flow through the flow sensor and the flow control valve.

[0020] S5: circulate the liquid for a certain period of time, record the condition of the to-be-tested blood vessel stent, and evaluate the performance of the to-be-tested blood vessel stent.

[0021] The use method realizes the method or process according to the embodiments of the present disclosure.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] (1) The multi-joint chain composed of the support unit and the support bone block can realize multi-degree-of-freedom adjustment on the support base, and the space structure in which the blood vessel model is located is similar to that in the human body, which can adapt to blood vessels with different distribution patterns and enhance the reliability and authenticity of the blood vessel stent test.

[0024] (2) The tubular air film is used to fix the blood vessel model, which can better simulate the state of the blood vessel being wrapped by the muscle in the human body and optimize the test results.

[0025] (3) The tubular air film made of water-color-changing material is used to wrap the blood vessel model, which can more intuitively reflect the blood leakage caused by the insufficient sealing of the to-be-tested blood vessel stent during performance test.

[0026] (4) The blood vessel model and the liquid circulation assembly can be detachably connected in the form of a pipe joint, which is convenient to replace and facilitates performance test of different to-be-tested blood vessel stents, can save costs, and avoids the shortcoming that one stent corresponds to one test bench. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the structure diagram of the support device for blood vessel stent performance test in embodiment 1 of the present application;

[0028] Figure 2 isFigure 1 Connection diagram of the support bone block and the transition bone block;

[0029] Figure 3 For Figure 1 Structure diagram of a single support unit;

[0030] Figure 4 For Figure 3 Partial sectional view;

[0031] Figure 5 For Figure 3 Structure diagram of the movable adjustment mechanism;

[0032] Figure 6 Front view of the blood vessel stent performance test system in Embodiment 2 of the present application;

[0033] Figure 7 Isometric view of the blood vessel stent performance test system in Embodiment 2 of the present application;

[0034] In the drawings, the components represented by each reference numeral are listed as follows:

[0035] 1. Multi-joint chain, 101. Support bone block, 102. Connection sphere, 103. Sphere clamping groove, 104. Semi-circular groove, 105. Transition bone block;

[0036] 2. Support unit, 201. Mounting plate, 202. Insert rod, 203. Fixed rack, 204. Movable gear, 205. Movable rack, 206. Positioning cavity I, 207. Positioning screw, 208. Locking nut, 209. Positioning cavity II, 210. Compression spring, 211. Support seat, 212. Positioning hole, 213. Support frame;

[0037] 3. Movable adjustment mechanism, 301. Center column, 302. Sleeve, 303. Folded edge, 304. Lifting screw, 305. Positioning nut, 306. Hinge;

[0038] 4. Frame body;

[0039] 5. Liquid circulation assembly, 501. Pump, 502. Liquid suction pipe, 503. Water bath heating pot, 504. Liquid return pipe, 505. Liquid delivery pipe;

[0040] 601. Tubular air film, 602. Blood vessel model;

[0041] 701. Flow control valve, 702. Pressure sensor, 703. Flow sensor. DETAILED DESCRIPTION

[0042] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0043] It should be noted that when a component is referred to as being "mounted on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as being "disposed on" another component, it can be directly disposed on the other component or there can be a middle component. When a component is referred to as being "fixed on" another component, it can be directly fixed on the other component or there can be a middle component.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0045] Embodiment 1

[0046] Please refer to Figure 1 , Figure 1 A structural diagram of a support device for a vascular stent performance test provided for Embodiment 1 includes a support seat 211 and a plurality of support bone blocks 101.

[0047] In general, the support bone blocks 101 are detachably connected with the support seat 211 through the support unit 2; transition bone blocks 105 are further connected between adjacent support bone blocks 101; the plurality of support bone blocks 101 and the transition bone blocks 105 form a multi-joint chain 1 for main body support of a vascular model 602.

[0048] It should be noted that the vascular model 602 is made by 3D printing processing and has a breakage on the side wall. The vascular model 602 is internally provided with a vascular stent to be tested, and the vascular stent to be tested seals the breakage from the inside. The vascular model 602 is loaded in a tubular air film 601, and the tubular air film 601 is placed on the multi-joint chain 1. The vascular model 602 is placed before the tubular air film 601 is inflated, and the tubular air film 601 is inflated after the placement is completed, so that the inner wall of the tubular air film 601 fully wraps the vascular model 602. Generally, the tubular air film 601 is made of a water-color-changing material (for example, color-changing silica gel), and the length of the tubular air film 601 is greater than the length of the vascular model 602.

[0049] Please refer to Figure 2The structure of the support bone block 101 and the transition bone block 105 is the same. Take the support bone block 101 as an example for illustration: the top of the support bone block 101 is processed with a semicircular groove 104 for clamping the tubular air film 601 (after the tubular air film 601 is inflated, the interference fit can be achieved); the front end of the support bone block 101 is arc-shaped and is provided with a connecting sphere 102; the rear end of the support bone block 101 is also arc-shaped and is processed with a sphere clamping groove 103 matched with the connecting sphere 102. As shown in Figure 2 , the connecting sphere 102 of one of the two adjacent bone blocks is inserted into the sphere clamping groove 103 of the other bone block. It should be noted that the edge of the sphere clamping groove 103 is an elastic structure, which facilitates the active connection of the connecting sphere 102 and the sphere clamping groove 103, and the maximum angle between the axes of the two bone blocks can be 30°. Based on this connection mode, the multi-joint chain 1 can realize arbitrary rotation and stretching within a certain angle and distance, and has high flexibility. Figure 1 , the multi-joint chain 1 is shown in a straight line type.

[0050] It should be noted that the transition bone block 105 between adjacent support bone blocks 101 is not the more the better, and generally one or two are provided. Figure 1 , the transition bone block 105 connected between the adjacent support bone blocks 101 is shown.

[0051] For the support seat 211, a plurality of positioning holes 212 are arranged thereon. The support seat 211 can adopt a punched plate, and the diameter of the positioning hole 212 can be 20 mm.

[0052] The structure of the support unit 2 is the same, and one of them is taken as an example for illustration: as shown in Figure 3 , the support unit 2 comprises a mounting plate 201, a fixed rack 203, a movable rack 205, and a movable gear 204.

[0053] The bottom surface of the mounting plate 201 is provided with a plug rod 202 for inserting the positioning hole 212, so that the plug rod 202 can be inserted into the positioning hole 212 to achieve the detachable connection of the mounting plate 201 and the support seat 211, which is convenient to assemble and disassemble. The fixed rack 203 is fixed on one side of the top surface of the mounting plate 201. The movable rack 205 is arranged on the other side of the top surface of the mounting plate 201 and is parallel to the fixed rack 203. The movable gear 204 is placed on the top surface of the mounting plate 201 between the fixed rack 203 and the movable rack 205 and is engaged with the fixed rack 203 and the movable rack 205. It should be noted that the movable gear 204 is placed on the top surface of the mounting plate 201 and is clamped by the fixed rack 203 and the movable rack 205, so that when the movable rack 205 moves, the movable gear 204 will move by the meshing action.

[0054] The support bone block 101 is located above the movable gear 204. The movable adjusting mechanism 3 is connected between the movable gear 204 and the support bone block 101, and is used to adjust the orientation of the support bone block 101. The positioning mechanism is used to change the position of the movable gear 204 by adjusting the movement or fixation of the movable gear rack 205.

[0055] Referring to Figure 4 , the positioning mechanism comprises a positioning cavity one 206, a positioning cavity two 209, a positioning screw 207, and a compression spring 210. The positioning cavity one 206 and the positioning cavity two 209 are respectively arranged at the two ends of the other side of the top surface of the mounting plate 201. The positioning screw 207 penetrates and is screwed to the side wall of the positioning cavity one 206. The compression spring 210 is arranged in the positioning cavity two 209. One end of the movable gear rack 205 extends into the positioning cavity one 206 and abuts against the positioning screw 207, and the other end extends into the positioning cavity two 209 and abuts against the compression spring 210. In this way, the movement direction of the movable gear rack 205 is limited by the positioning cavity one 206 and the positioning cavity two 209, and the compression spring 210 makes the movable gear rack 205 have a tendency to move towards the positioning cavity one 206, so that adjusting the screwing degree of the positioning screw 207 can make the movable gear rack 205 move. The positioning screw 207 can be self-locked by the thread action, and is self-positioned without rotation (of course, the locking nut 208 can be used to lock and position the positioning screw 207), and the movable gear rack 205 is no longer moved under the abutting action of the positioning screw 207, that is, the adjustment is completed. Referring to the above, with the movement of the movable gear rack 205, the movable gear 204 also moves in a rotating manner, so that the support bone block 101 above can be moved.

[0056] Referring to Figure 5Since the moving gear 204 performs rotational movement, if the support bone block 101 is connected with the moving gear 204 in an integrated manner, it is easy to cause strong pulling to the blood vessel model 602 placed on the support bone block 101. Therefore, the present application designs a movable adjusting mechanism 3, which comprises a center column 301, a sleeve 302, and four lifting screws 304. The center column 301 is coaxially connected at the center of the moving gear 204. The sleeve 302 is sleeved on the center column 301 and can rotate freely. The top of the sleeve 302 is further provided with an annular folded edge 303. The four lifting screws 304 are evenly arranged along the folded edge 303. The lifting screws 304 penetrate through the folded edge 303 and are positioned by two positioning nuts 305; one of the positioning nuts 305 is located above the folded edge 303 and the other positioning nut 305 is located below the folded edge 303. The top end of the lifting screw 304 is further hinged to the bottom surface of the support bone block 101 through a hinge 306. In this way, the support bone block 101 can rotate relative to the center column 301 through the sleeve 302, so as to eliminate the pulling to the blood vessel model 602; in addition, by adjusting the positions of the two positioning nuts 305, the lifting distance of the lifting screw 304 relative to the folded edge 303 can be adjusted, and in cooperation with the hinge 306 connected with the support bone block 101, the inclination angle of the support bone block 101 can be adjusted.

[0057] In addition, considering that the blood vessel model 602 needs to be connected with other components during testing, at least two support frames 213 can be further added, which are arranged at intervals on the support seat 211 and are detachably connected with the support seat 211, and are used for supporting the two ends of the blood vessel model 602. Similar to the support unit 2, the bottom surface of the support frame 213 is also provided with the insertion rod 202, which is used for inserting the positioning hole 212. In this way, the support unit 2 can support the tubular air film 601 from both ends.

[0058] Embodiment 2

[0059] Referring to Figure 6 , Figure 7 , the present embodiment 2 discloses a blood vessel stent performance test system, which comprises the support device for blood vessel stent performance test as disclosed in embodiment 1, a liquid circulating assembly 5, a flow sensor 703, and a pressure sensor 702.

[0060] As shown in Figure 6 , the support device can be installed on the frame body 4, which is more convenient for operation.

[0061] The liquid circulating assembly 5 is used to circulate liquid into the blood vessel model 602. Specifically, the liquid circulating assembly 5 comprises a water bath heating pot 503 and a pump 501. The water bath heating pot 503 is used to provide liquid at a set temperature. The maximum flow rate of the pump 501 is greater than 60 L / min. The liquid inlet end of the pump 501 is connected to the water bath heating pot 503 through a liquid suction pipe 502, and the liquid outlet end is connected to one end of the blood vessel model through a liquid delivery pipe 505. The other end of the blood vessel model 602 is connected to the water bath heating pot 503 through a liquid return pipe 504. In this way, the pump 501 can be started to realize liquid circulation, simulating the scene of blood flowing through the blood vessel. Since the blood vessel model 602 is supported by the supporting device, it can be prevented from falling.

[0062] In order to control the flow of liquid, a pressure sensor 702 can be arranged at each of the inlet and outlet of the blood vessel model 602, so that the pressure change in the blood vessel model 602 can be measured. A flow sensor 703 is arranged at the inlet of the blood vessel model 602, so that the flow in the blood vessel model 602 can be measured. The liquid delivery pipe 505 is provided with a flow control valve 701, which can adjust the flow of liquid into the blood vessel model according to the reading of the flow sensor 703.

[0063] Of course, in order to ensure the repeatability of the test, the connection between the pipes (especially the connection between the liquid delivery pipe 505, the liquid return pipe 504 and the blood vessel model) adopts a pipe joint, which is detachably connected based on a threaded connection and ensures the sealing.

[0064] The embodiment 2 also synchronously discloses a use method of the above-mentioned blood vessel stent performance test system, which comprises the following steps:

[0065] S1, a blood vessel model 602 with a broken side wall is obtained; first, the blood vessel stent to be tested is loaded into the blood vessel model 602, so that the blood vessel stent to be tested seals the broken part from the inside; then, the blood vessel model 602 is sleeved into the tubular air film 601; the tubular air film 601 is inflated, so that the tubular air film 601 completely wraps the blood vessel model 602;

[0066] S2, the position of the supporting unit 2 on the supporting seat 211 is adjusted, so that the direction of the multi-joint chain 1 is similar to the direction of the blood vessel in the CT image, and then the tubular air film 601 is buckled into the semicircular groove 104 of the multi-joint chain 1;

[0067] S3, the supporting bone joint block 101 of the supporting unit 2 is finely adjusted in the plane position by the positioning mechanism, and the height of the supporting bone joint block 101 of the supporting unit 2 is adjusted by the positioning nut 305, so that the overall curve of the multi-joint chain 1 tends to be smooth;

[0068] S4, first through the water bath heating pot 503 to heat the liquid (generally using water) in it to the set temperature (usually set to 37℃), start pump machine 501 through the liquid circulation assembly 5 to make the liquid circulation through the blood vessel model 602, and through the flow sensor 703 cooperate with the flow control valve 701 to control the flow into the blood vessel model 602 to the set flow.

[0069] Generally, if the simulation object is the aorta in the human body, the set flow is 60L / min. If it is other type of blood vessel, the set flow is adjusted adaptively.

[0070] S5: carry out liquid circulation for a certain time, record the condition of the blood vessel stent to be tested, and evaluate the performance of the blood vessel stent to be tested.

[0071] Specifically, whether the blood vessel stent to be tested slips or not is recorded, and the fatigue damage condition thereof is analyzed, and the performance of the stent is preliminarily evaluated.

[0072] It should be noted that if the performance of the blood vessel stent to be tested is insufficient, the blood vessel model 602 will not be sealed, and two phenomena will occur: 1. The liquid flowing through the blood vessel model 602 will seep out of the break, and react with the tube gas film 601, causing the tube gas film 601 to discolor (utilizing the feature that the material thereof discolors when it comes into contact with water); 2. The pressure drop of the blood vessel model 602 inlet and outlet increases, and the readings of the two pressure sensors 702 are obviously different, and the reading of the pressure sensor 702 located at the inlet of the blood vessel model 602 is obviously greater than that of the pressure sensor 702 located at the outlet of the blood vessel model 602. Thus, the operator can be prompted directly.

[0073] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present application.

[0074] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A support device for testing the performance of a vascular stent, comprising: a support base having a plurality of positioning holes arranged in an array thereon; and a plurality of support segments, the support segments being detachably connected to the support base via a support unit, and adjacent support segments being further connected via a transition segment, the plurality of support segments and the transition segment forming a multi-joint chain for supporting a vascular model, the support segments and the transition segments having the same structure; wherein the vascular model has a side wall with a breach, the vascular model having a vascular stent to be tested arranged therein, the vascular stent sealing the breach from the inside, the vascular model being arranged in a tubular air film, and the tubular air film being arranged on the multi-joint chain. wherein the support unit comprises: a mounting plate having a plurality of insertion rods arranged on a bottom surface thereof for insertion into the positioning holes; a fixed rack arranged on one side of a top surface of the mounting plate; a movable rack arranged on the other side of the top surface of the mounting plate and parallel to the fixed rack; a movable gear arranged on the top surface of the mounting plate between the fixed rack and the movable rack and engaged with the fixed rack and the movable rack, the support segments being arranged above the movable gear; a movable adjusting mechanism connected between the movable gear and the support segments for adjusting the orientation of the support segments; and a positioning mechanism for changing the position of the movable gear by adjusting the movement of the movable rack and for positioning the movable gear by fixing the movable rack.

2. The support device for testing the performance of a vascular stent according to claim 1, wherein: the top of each support segment has a semicircular groove, the front end of each support segment has an arc surface and is provided with a connecting sphere, and the rear end of each support segment also has an arc surface and is provided with a sphere clamping groove matched with the connecting sphere. the movable adjusting mechanism comprises: a central column coaxially connected to the center of the movable gear; 3. The support device for a blood vessel stent performance test according to claim 2, wherein a sleeve arranged on the central column, the top of the sleeve being further provided with an annular folded edge; and four lifting screws evenly arranged along the folded edge, the lifting screws penetrating through the folded edge and being positioned by two positioning nuts, one of the positioning nuts being arranged above the folded edge and the other being arranged below the folded edge, the top end of each lifting screw being further hingedly connected to the bottom surface of the support segment.

4. The support device for testing the performance of a vascular stent according to claim 3, wherein: the positioning mechanism comprises: a positioning cavity one and a positioning cavity two arranged at the two ends of the other side of the top surface of the mounting plate; a positioning screw penetrating through and screwing the side wall of the positioning cavity one; and a compression spring arranged in the positioning cavity two, one end of the movable rack extending into the positioning cavity one and abutting against the positioning screw, and the other end extending into the positioning cavity two and abutting against the compression spring. further comprising: at least two support frames arranged on the support base at intervals and detachably connected to the support base for supporting the two ends of the vascular model, the bottom surface of each support frame being also provided with an insertion rod for insertion into the positioning holes. the tubular air film is made of a water-color-changing material, and the length of the tubular air film is greater than the length of the vascular model. the support device for testing the performance of a vascular stent according to any one of claims 3-6; and 5. The support device for testing the performance of a vascular stent according to claim 3, wherein a liquid circulating assembly for circulating liquid into the vascular model. ​ 6. The support device for testing the performance of a vascular stent according to claim 3, wherein ​ 7. A vascular stent performance testing system, comprising: ​ ​ ​ a flow sensor for measuring the flow rate in the blood vessel model; and a pressure sensor for measuring the pressure change in the blood vessel model.

8. The vascular stent performance testing system of claim 7, wherein, The liquid circulation assembly comprises: a water bath heating pot for providing liquid at a set temperature; and a pump machine, the inlet end of which is connected to the water bath heating pot through a suction tube, and the outlet end of which is connected to one end of the blood vessel model through a liquid delivery tube; the other end of the blood vessel model is connected to the water bath heating pot through a liquid return tube; wherein, one pressure sensor is arranged at each of the inlet and outlet of the blood vessel model; the inlet of the blood vessel model is further provided with a flow sensor; the liquid delivery tube is provided with a flow control valve for adjusting the flow rate of the liquid into the blood vessel model.

9. The vascular stent performance testing system of claim 8, wherein, The liquid delivery tube, the liquid return tube and the blood vessel model are detachably connected through a pipe joint.

10. The method of using a vascular stent performance testing system of claim 9, wherein, The method comprises the following steps: S1, obtaining a blood vessel model with a broken side wall; first, the blood vessel stent to be measured is loaded into the blood vessel model, so that the blood vessel stent to be measured seals the broken part from the inside; then, the blood vessel model is sleeved into a tubular air film; the tubular air film is inflated to completely wrap the blood vessel model; S2, adjusting the position of the support unit on the support seat so that the direction of the multi-joint chain is similar to the direction of the blood vessel in the CT image, and then buckling the tubular air film into the semicircular groove of the multi-joint chain; S3, fine-tuning the support bone block of the support unit in the plane position through the positioning mechanism, and adjusting the height of the support bone block of the support unit through the positioning nut, so that the overall curve of the multi-joint chain tends to be smooth; S4, first, heating the liquid in the water bath heating pot to a set temperature, and then starting the pump machine to circulate the liquid through the blood vessel model through the liquid circulation assembly, and controlling the flow rate of the liquid into the blood vessel model to reach a set flow rate through the flow sensor and the flow control valve; S5: circulating the liquid for a certain period of time, recording the condition of the blood vessel stent to be measured, and evaluating the performance of the blood vessel stent to be measured.

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