A device for loading and detecting a vascular stent in vitro

Abstract

The present invention discloses an in vitro loading and detection device for a vascular stent. The housing includes three chambers. The first, second, and third chambers are respectively provided with a supporting and fixing mechanism, a temperature sensing mechanism, and a loading and stretching mechanism. The supporting and fixing mechanism and the loading and stretching mechanism are connected by a flexible strip. The supporting and fixing mechanism includes a hose, a support seat, and a limiting ring frame. The vascular stent is placed in the hose. Both ends of the hose are plugged with plugs connected to the fixing block. The limiting ring frame is fixed to the support seat and encircles the outer circumference of the hose. The loading and stretching mechanism includes an aluminum foil, a transmission assembly, and a power device. The transmission assembly slides along a slide rail under the action of the power device. One end of the aluminum foil is connected to a tension sensor, and the other end extends into the first chamber. Several clamping mechanisms are evenly distributed on the free end of the aluminum foil. The device is used to detect the radial compressive limit value of the vascular stent, and can obtain the clinical durability of the stent structure, providing data support for its clinical application.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to an in vitro loading and detection device for a vascular stent. Background Art

[0002] In recent years, with the progress of human society and the improvement of living standards, the incidence and mortality of cardiovascular diseases have far exceeded those of various other diseases, posing a serious threat to human health. Vascular stent implantation is one of the main methods for clinical treatment of arterial stenosis. It is an external structure that mainly implants an internal stent in the lesion segment to support the stenotic and occluded segment of the blood vessel, reduce vascular elastic recoil and reshaping, and maintain smooth blood flow in the lumen. However, after stent implantation, the patient's blood vessels still face problems such as restenosis and endothelial hyperplasia and sclerosis after surgery. The occurrence of these problems is directly affected by the mechanical properties of the stent.

[0003] Devices for testing the mechanical properties of vascular stents have been proposed in the prior art, and such devices can be used to test the load and pressure limits of vascular stents; for example, Chinese patent CN112198053A discloses an in vitro loading device for a vascular stent, comprising a bottom supporting mechanism, a top support frame and a detachable compression mechanism; the detachable compression mechanism comprises a threaded screw, a horizontal sliding block, a fixed shaft, a longitudinal sliding block, a pressure head mechanism and a motor, the threaded screw being rotatably arranged on the top support frame, the horizontal sliding block being threadedly connected to the threaded screw, the fixed shaft being fixedly connected to the bottom of the horizontal sliding block, the longitudinal sliding block being matingly sleeved on the fixed shaft, and the side of the longitudinal sliding block being connected to the motor via a crank-connecting rod mechanism so that it can perform reciprocating motion axially along the fixed shaft; the pressure head mechanism is detachably fixedly connected to the front side of the longitudinal sliding block, the pressure head mechanism main body being in a trident shape, with a point pressure head, a line pressure head and a surface pressure head connected to the ends of the three forks respectively. Although the device can perform mechanical tests on vascular stents of various specifications, it mainly tests the axial stress limit of the stent and obtains the axial stress limit. Since the device has no way of knowing the radial stress limit of the stent, the test results are not perfect.

[0004] Therefore, it is necessary to design a device for detecting the radial force limit of the structure of the vascular stent in order to fully obtain the mechanical performance data of the stent and provide more comprehensive and realistic data for the clinical application of the vascular stent. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies in the prior art and disclose an in vitro loading and detection device for a vascular stent, which can conveniently and effectively perform mechanical property tests on vascular stents of various specifications in the radial direction, and provide more comprehensive and realistic data for the clinical application of vascular stents.

[0006] The technical solution of the present invention is: a device for in vitro loading and detection of a vascular stent, comprising a box body and a cover plate, wherein the box body is divided into a first chamber, a second chamber and a third chamber by a partition; a supporting and fixing mechanism is provided in the first chamber, a temperature sensing mechanism is provided in the second chamber, and a loading and stretching mechanism is provided in the third chamber, and the supporting and fixing mechanism and the loading and stretching mechanism are connected by a flexible strip; the supporting and fixing mechanism comprises a hose, a plug, a support seat and a limiting annular frame, the vascular stent is placed in the hose, and the plugs are inserted at both ends of the hose, and the plugs are detachably connected to the fixing block; the limiting annular frame is fixed on the support seat, and the limiting annular frame is sleeved on the outer circumference of the hose; the loading and stretching mechanism comprises an aluminum foil, a transmission assembly, a power device and a slide rail, and the transmission assembly slides along the slide rail under the action of the power device; one end of the aluminum foil is fixed to a tension sensor provided on the transmission assembly, and the other end extends into the first chamber, and a plurality of clamping mechanisms are evenly distributed on the free end of the aluminum foil; a linear displacement sensor is provided on the top of the transmission assembly.

[0007] Furthermore, the inner diameter of the hose is adapted to the outer diameter of the vascular stent, and the hose is made of a transparent material.

[0008] Furthermore, a connecting block is provided at the outer end of the plug, and a group of fixing blocks are fixedly connected on the two opposite inner walls of the first chamber by bolts. The two fixing blocks are arranged opposite to each other in the first chamber, and a connecting ear is provided at the inner end of the fixing block. The connecting block on the plug is connected to the connecting ear on the fixing block on the corresponding side by a pin structure.

[0009] Furthermore, the limiting ring frame includes two parts: a fixed ring seat and a movable ring cover. Several ring frame fixing grooves are evenly distributed on the support seat along its length direction. The fixed ring seat is fixed in the ring frame fixing groove, and one end of the movable ring cover is rotatably connected to one end of the fixed ring seat.

[0010] Furthermore, the transmission assembly includes a screw seat, a screw nut and a ball screw. The screw seat is slidably connected to the slide rail, the slide rail is fixed on the bottom surface of the second chamber and extends along its length. The screw nut is arranged on one end of the screw seat close to the power device, and the ball screw is connected inside the screw nut. The other end of the ball screw is connected to the power device through a coupling; the linear displacement sensor is fixed on the top of the screw seat, and the end of its displacement rod head close to the first chamber is against the wall of the second chamber and fixed to it.

[0011] Furthermore, the clamping mechanism includes a clamping bolt and a spinning nut. The clamping bolt is fixed on the aluminum foil. The flexible strip is wound around the clamping bolt and then clamped by the spinning nut.

[0012] Furthermore, the temperature measuring rod head of the temperature sensing mechanism passes through the corresponding adaptive through hole arranged on the partition and extends into the first chamber, and an electric heating plate is provided in the first chamber.

[0013] Furthermore, several flexible strips are distributed at equal distances on the support seat and are spaced apart from the limiting annular frame. After one end of the flexible strip is fixed to one side of the support seat, it passes over the hose, around its outer circumference, to the other side of the support seat, and then passes out and is clamped and limited by a clamping mechanism.

[0014] Furthermore, an array of movable through holes is provided on the support base, and a movable cavity is provided at the bottom of the support base corresponding to the setting position of each flexible strip, and several outlets are evenly distributed on the side of the support base close to the third chamber; each group of movable through holes includes relatively arranged inlet through holes and outlet through holes, and the inlet through holes and outlet through holes in the same group are in the same longitudinal plane, one end of the inlet through hole passes through the top of the support base, and the other end passes through to the corresponding movable cavity, and one end of the outlet through hole passes through the top surface of the support base, and the other end is connected to the corresponding outlet.

[0015] Furthermore, the bottom surface of the outlet is higher than the top surface of the movable cavity, and the number of the flexible strips is not less than three.

[0016] The beneficial effects of the present invention are:

[0017] 1. The in vitro loading and testing device for a vascular stent disclosed in this application is primarily used to detect the radial compression limit of a vascular stent. The purpose is to effectively test and accurately provide feedback on the clinical durability of the stent structure, thereby providing data support for the effective clinical application of the vascular stent.

[0018] 2. The device disclosed in this application primarily applies radial pressure to the vascular stent through a flexible strip. During in vitro loading testing, the flexible strips can operate individually or in combination. A single strip operates in a single-point local compression loading mode, while multiple strips operate in combination in a multi-point synchronous compression loading mode. This design has a simple structure and facilitates free switching of loading modes, making it easy to obtain test values ​​under different loading modes. The test results are more comprehensive, helping to better understand the mechanical properties of the vascular stent.

[0019] 3. The limiting ring frame is a two-petal structure that can be rotated and opened, which facilitates the removal and installation of the hose. In the working state, the limiting ring frame is closed around the periphery of the vascular stent, which can prevent the vascular stent from lateral displacement and distortion during the test, helping to improve the stability of the test process.

[0020] 4. An electric heating plate is provided in the first chamber, and the temperature sensing mechanism can measure the temperature changes in the first chamber in real time, simulating the internal environment of the human body and more realistically reflecting the mechanical performance data of the vascular stent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an axonometric diagram of an in vitro loading and testing device for a vascular stent with the cover removed;

[0022] Figure 2 This is an axonometric diagram of an in vitro loading and testing device for a vascular stent with the cover and box removed;

[0023] Figure 3 This is an axonometric diagram of an in vitro loading and testing device for a vascular stent with the cover and box removed;

[0024] Figure 4 This is an axonometric drawing of the upper limit ring frame of the support seat in the open state;

[0025] Figure 5 This is an axonometric drawing of the upper limit ring frame of the support seat in the closed state;

[0026] Figure 6 This is a rear view schematic diagram of the upper limit ring frame of the support base in the open state;

[0027] Among them, 1-first chamber, 2-second chamber, 3-third chamber;

[0028] 11-supporting and fixing mechanism, 12-strip braided rope, 13-vascular stent, 14-electric heating plate;

[0029] 111-hose, 112-plug, 113-fixing block, 114-support seat, 115-limiting ring frame;

[0030] 1121-connection block;

[0031] 1131-Connecting ear;

[0032] 1141 - movable cavity, 1142 - outlet, 1143 - inlet through hole, 1144 - outlet through hole;

[0033] 1151-fixed ring seat, 1152-movable ring cover;

[0034] 21- temperature sensing mechanism;

[0035] 211-temperature measuring rod head;

[0036] 31- loading and stretching mechanism;

[0037] 311-aluminum foil, 312-transmission assembly, 313-power device, 314-slide rail;

[0038] 3111-Compression mechanism;

[0039] 3121-screw seat, 3122-screw nut, 3123-ball screw, 3124-coupling, 3125-tension sensor;

[0040] 1261-Tightening bolt, 1262-Spinning nut. DETAILED DESCRIPTION

[0041] The following examples further illustrate the present invention, but should not be construed as limiting the present invention. Without departing from the essence of the present invention, modifications and substitutions made to the methods, steps or conditions of the present invention are within the scope of the present invention.

[0042] Example 1:

[0043] In order to better detect the stress limit of the vascular stent when it is subjected to radial compression, provide real feedback on the clinical durability of the corresponding stent structure, and provide data support for the effective clinical application of the vascular stent, this embodiment discloses an in vitro loading and detection device for the vascular stent, including a box and a cover (not shown in the figure). The cover can match the top surface of the closed box to place the loading and detection devices in a relatively independent environment during operation. In order to facilitate real-time observation of the internal situation of the box during the loading and detection process, the cover is made of transparent material.

[0044] The box is separated by partitions into three relatively independent chambers: the first chamber 1, the second chamber 2, and the third chamber 3. After the cover is connected, the internal environments of the three chambers are relatively independent, reducing mutual interference and being unaffected by the external environment. A support and fixing mechanism 11 is provided in the first chamber 1, a temperature sensing mechanism 21 is provided in the second chamber 2, and a loading and stretching mechanism 31 is provided in the third chamber 3. The support and fixing mechanism 11 and the loading and stretching mechanism 31 are connected by a flexible strip. Preferably, the flexible strip used in this embodiment can be a strip of braided rope 12.

[0045] The supporting and fixing mechanism 11 includes a hose 111, a plug 112, a fixing block 113, a support seat 114 and a limiting ring frame 115. The inner diameter of the hose 111 is adapted to the outer diameter of the vascular stent 13. The vascular stent 13 is placed in the hose 111. The hose 111 is made of a transparent material. Plugs 112 are plugged and connected at both ends of the hose 111. A connecting block 1121 is provided at the outer end of the plug 112. A set of fixing blocks 113 are fixedly connected on two opposite inner walls of the first chamber 1 by bolts. The two fixing blocks 113 are arranged oppositely in the first chamber 1, and a connecting ear 1 is provided at the inner end of the fixing block 113. 131, the connecting block 1121 on the plug 112 is detachably fixedly connected to the connecting ear 1131 on the fixing block 113 on the corresponding side through a pin structure. This structure can generate a group resistance to prevent the vascular stent 13 from twisting and deformation. At the same time, the multi-joint detachable connection form also facilitates the loading and unloading of the vascular stent 13; the support seat 114 is arranged below the hose 111, and the support seat 114 is fixed on the bottom surface of the first chamber 1, and the limiting ring frame 115 is fixed on the support seat 114. The limiting ring frame 115 is ring-shaped on the outside of the hose 111 to prevent the hose 111 from lateral displacement and twisting during the test.

[0046] To facilitate the installation and disassembly of the vascular stent 13, the limiting ring frame 115 is designed as a two-petal structure that can be opened from the top, specifically including a fixed ring seat 1151 and a movable ring cover 1152. Several ring frame fixing grooves are evenly distributed on the support seat 114 along its length direction. The fixed ring seat 1151 is fixed in the ring frame fixing groove. One end of the movable ring cover 1152 is rotatably hinged to one end of the fixed ring seat 1151 so that the movable ring cover 1152 can be opened to one side relative to the fixed ring seat 1151.

[0047] The loading and stretching mechanism 31 includes an aluminum foil sheet 311, a transmission assembly 312, a power device 313 and a slide rail 314. The slide rail 314 is fixed on the bottom surface of the second chamber 2 and extends along its length. The transmission assembly 312 is movably connected to the slide rail 314. The transmission assembly 312 slides along the slide rail 314 under the action of the power device.

[0048] The transmission assembly 312 includes a screw seat 3121, a screw nut 3122 and a ball screw 3123. The screw seat 3121 is slidably connected to the slide rail 314. The screw nut 3122 is arranged on one end of the screw seat 3121 close to the power device 313. The ball screw 3123 is connected inside the screw nut 3122. The other end of the ball screw 3123 is connected to the power device 313 through a coupling 3124. In this embodiment, the power device 313 is preferably a servo motor.

[0049] A tension sensor 3125 is connected to the side of the screw seat 3121 near the first chamber 1 via a force sensing fixture. One end of the aluminum foil 311 is fixed to the tension sensor 3125, while the other end extends into the first chamber 1 through a matching hole in the partition. The tension sensor 3125 can detect the tension of the aluminum foil 311 in real time and provide feedback to the main controller for tension control. Four compression mechanisms 3111 are evenly distributed along the width of the aluminum foil 311, near the end of the support and fixing mechanism 11, to limit the end of the braided strip 12. This structure also facilitates adjustment of the radial pre-compression force before loading, depending on the specific model of the vascular stent 13.

[0050] The clamping mechanism 3111 includes a clamping bolt 1261 and a screw nut 1262. The clamping bolt 1261 is fixed on the aluminum foil 311. After the strip braided rope 12 is wrapped around the clamping bolt 1261, it is tightened by the screw nut 1262 to complete the limiting work of the end of the strip braided rope 12.

[0051] A linear displacement sensor 3127 is provided on the top of the screw seat 3121. The displacement rod head of the linear displacement sensor 3127 is close to the end of the first chamber 1 and is pressed against the wall of the second chamber 2 and fixed thereto. The displacement change value can be measured by utilizing the principle that the relative working direction of the linear displacement sensor 3127 is opposite to the moving direction of the transmission assembly 312.

[0052] The four strip-shaped braided ropes 12 are distributed at equal distances on the support seat 114 and are spaced apart from the fixed ring seat 1151. After one end of the strip-shaped braided rope 12 is fixed to one side of the support seat 114, the rope segment passes over the outer circumference of the hose 111 and then passes through the other side of the support seat 114 and is clamped and limited by the clamping mechanism 3111.

[0053] The specific setting method of the strip braided rope 12 is as follows: four groups of movable through holes are provided on the support seat 114 for the strip braided rope 12 to pass in and out, and a movable cavity 1141 is provided at the bottom of the support seat 114 corresponding to the setting position of each strip braided rope 12, and four outlets 1142 are evenly distributed on the side of the support seat 114 close to the third chamber 3; each group of movable through holes includes an inlet through hole 1143 and an outlet through hole 1144 that are relatively arranged, and the inlet through holes 1143 and the outlet through holes 1144 in the same group are in the same longitudinal plane, one end of the inlet through hole 1143 passes through the top of the support seat 114, and the other end passes through to the movable cavity 1141 at the corresponding position, and one end of the outlet through hole 1144 passes through the top surface of the support seat 114, and the other end is connected to the outlet 1142 at the corresponding position. When installing the strip braided rope 12, first pass it through the position of the movable cavity 1141 into the inlet hole 1143, and tie a knot at the end of the strip braided rope 12 to limit one end of it. After the flexible strip passes through the top surface of the support seat 114, it wraps around the surface of the hose 111 from above, and then passes through the top surface of the support seat 114 into the outlet hole 1144, and finally passes through the outlet 1142 to be connected to the clamping mechanism 3111.

[0054] The temperature measuring rod head 211 of the temperature sensing mechanism 21 passes through the corresponding adaptive through hole set on the partition and extends into the first chamber 1. An electric heating plate 14 is provided in the first chamber 1. The temperature sensing mechanism 21 can measure the temperature changes in the first chamber 1 in real time to simulate the internal environment of the human body.

[0055] The various sensing devices and servo motors used in this embodiment are all end-controlled by an external controller, and the corresponding sensing data can also be observed in real time from the controller end, making it easier to intuitively understand the mechanical performance data of the vascular stent.

[0056] Preferably, the bottom surface of the outlet 1142 is higher than the top surface of the movable cavity 1141, so that there is a height difference H at both ends of the flexible strip in the support seat 114, which makes the telescopic position of the flexible strip staggered. When the flexible strip is not working, it is in an unrestricted free state. After the aluminum foil 311 returns to its original position (that is, no radial pressure is applied to the hose), the flexible strip can be tightened again by relying on the natural elasticity of the hose 111. The rope segment led out of the through hole 1144 is compared with the rope segment led into the through hole 1143 on the other side. Since the contact area between the rope and the hole is smaller and the friction resistance is smaller, it can recover to the state before contraction more quickly, thereby reducing errors and improving measurement accuracy.

[0057] The working process of the device is as follows

[0058] First, place the vascular stent 13 in the hose 111, assemble the hose 111 and the plug 112, and fix the plug 112 to the fixing block 113; then insert the four strip braided ropes 12 into the corresponding inlet holes 1143 respectively and tie knots at the ends to fix them. The strip braided ropes 12 pass through the top of the support seat 114, bypass the surface of the hose 111, and then pass through the outlet hole 1144 on the other side, and finally pass through the outlet 1142. After that, the movable ring cover 1152 is rotated and closed on the fixed ring seat 1151. At this point, the initial loading work of the loading device is completed.

[0059] If it is necessary to know the stress limit of the stent when the vascular stent 13 is subjected to single-point local compression, it is only necessary to wrap the end of one of the strip braided ropes 12 around the corresponding clamping bolt 1261 and tighten it with the screw nut 1262. The strip braided rope 12 is in a tensioned and restricted state after being tightened by the clamping mechanism 3111; then the power device 313 is started to drive the transmission component 312 to move toward the power device 313, and the aluminum foil 311 moves synchronously to drive the strip braided rope 12 to further tighten, thereby achieving local radial compression of the vascular stent 13. The tension value can be obtained in time through the tension sensor 3125, and the linear displacement can be obtained through the linear displacement sensor 3127, and then the radial loading limit value of the vascular stent 13 under local stress can be observed and counted.

[0060] If it is necessary to know the stress limit of the stent when the vascular stent 13 is subjected to multi-point synchronous compression, the ends of the four strip braided ropes 12 can be wrapped around the corresponding clamping bolts 1261 and tightened with the screw nuts 1262. The strip braided ropes 12 tightened by the clamping mechanism 3111 are in a tensioned and restricted state; then the power device 313 is started to drive the transmission assembly 312 to move toward the power device 313, and the aluminum foil 311 moves synchronously to drive the four strip braided ropes 12 to be further tightened, thereby achieving multi-point synchronous radial compression of the vascular stent 13. The tension value can be obtained in time through the tension sensor 3125, and the linear displacement can be obtained through the linear displacement sensor 3127, and then the radial loading limit value of the vascular stent 13 under multi-point synchronous force is observed and counted.

[0061] The above shows and describes the basic principles, main features, and advantages of the present invention. However, the above is only a specific embodiment of the present invention, and the technical features of the present invention are not limited thereto. Any other implementation methods derived by any person skilled in the art without departing from the technical solution of the present invention should be included in the patent scope of the present invention.

Claims

1. A device for loading and detecting a vascular stent in vitro, characterized in that: It comprises a box body and a cover plate, wherein the box body is provided with a first chamber, a second chamber and a third chamber; The first chamber is provided with a supporting and fixing mechanism, the second chamber is provided with a temperature sensing mechanism, and the third chamber is provided with a loading and stretching mechanism, and the supporting and fixing mechanism and the loading and stretching mechanism are connected by a flexible strip; The supporting and fixing mechanism includes a hose, a support seat and a limiting ring frame. The vascular stent is placed in the hose, and plugs are inserted at both ends of the hose. The plugs are detachably connected to the fixing block; the limiting ring frame is fixed on the support seat and is sleeved around the outer circumference of the hose. The loading and stretching mechanism includes an aluminum foil sheet, a transmission assembly, a power device and a slide rail. The transmission assembly is driven by the power device. Slide along the slide rail; one end of the aluminum foil is connected to the tension sensor provided on the transmission assembly, and the other end extends into the first chamber. Several pressing mechanisms are evenly distributed on the free end of the aluminum foil; a linear displacement sensor is provided on the top of the transmission assembly; Several flexible strips are evenly distributed on the support base and spaced apart from the limiting annular frame. One end of the flexible strip is fixed to one side of the support base, passes over the hose, around its outer circumference, to the other side of the support base, and then passes out and is compressed and limited by a clamping mechanism. An array of movable through holes is provided on the support base, and a movable cavity is provided at the bottom of the support base corresponding to the setting position of each flexible strip, and several outlets are evenly distributed on the side of the support base close to the third chamber; each group of movable through holes includes relatively arranged inlet through holes and outlet through holes, and the inlet through holes and outlet through holes in the same group are in the same longitudinal plane, one end of the inlet through hole passes through the top of the support base, and the other end passes through to the corresponding movable cavity, and one end of the outlet through hole passes through the top surface of the support base, and the other end is connected to the corresponding outlet.

2. The in vitro loading and detection device for a vascular stent according to claim 1, characterized in that: The inner diameter of the soft tube is adapted to the outer diameter of the blood vessel stent, and the soft tube is made of transparent material.

3. The in vitro loading and detection device for a vascular stent according to claim 1, characterized in that: A connecting block is provided at the outer end of the plug, and a group of fixing blocks are fixedly connected on the two opposite inner walls of the first chamber by bolts. The two fixing blocks are arranged opposite to each other in the first chamber, and a connecting ear is provided at the inner end of the fixing block. The connecting block on the plug is connected to the connecting ear on the fixing block on the corresponding side by a pin structure.

4. The in vitro loading and detection device for a vascular stent according to claim 1, characterized in that: The limiting ring frame includes a fixed ring seat and a movable ring cover. Several ring frame fixing grooves are evenly distributed on the support seat along its length direction. The fixed ring seat is fixed in the ring frame fixing groove. One end of the movable ring cover is rotatably connected to one end of the fixed ring seat.

5. The in vitro loading and detection device for a vascular stent according to claim 1, characterized in that: The transmission assembly includes a screw seat, a screw nut and a ball screw. The screw seat is slidably connected to the slide rail, which is fixed on the bottom surface of the second chamber and extends along its length. The screw nut is arranged on one end of the screw seat close to the power device, and the ball screw is connected inside the screw nut. The other end of the ball screw is connected to the power device through a coupling; the linear displacement sensor is fixed on the top of the screw seat, and the end of its displacement rod head close to the first chamber is against the wall of the second chamber and fixed to it.

6. The in vitro loading and detection device for a vascular stent according to claim 1, characterized in that: The clamping mechanism includes a clamping bolt and a spinning nut. The clamping bolt is fixed on the aluminum foil. The flexible strip is wound around the clamping bolt and then clamped by the spinning nut.

7. The in vitro loading and detection device for a vascular stent according to claim 1, characterized in that: The temperature measuring rod head of the temperature sensing mechanism passes through a corresponding through hole arranged on the partition plate and then extends into the first cavity. An electric heating plate is arranged in the first cavity.

8. The in vitro loading and detection device for a vascular stent according to claim 7, characterized in that: The bottom surface of the outlet is higher than the top surface of the movable cavity, and the number of the flexible strips is not less than three.

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