Loading structure for conveying heart valve stent

Abstract

The utility model provides a loading structure used for conveying a heart valve support, which comprises a guide cover, a support rod and a support rod, the compression device is detachably connected with the guide cover; the heart valve stent is provided with a first barb and a second barb; the traction device comprises a traction rod, and the traction rod is matched with the first barb and the second barb; wherein the traction device pulls the heart valve stent from the compression device to the guide cover. According to the utility model, uniform stress can be ensured when the heart valve stent is compressed and arranged in the guide cover, and the damage of the heart valve stent caused by unnecessary inclination and friction is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to a loading structure for conveying a heart valve stent. Background Art

[0002] With the development of medical technology, interventional treatment has gradually grown and developed, especially in cardiac interventional surgery, the accurate and safe delivery of heart valve stents to the treatment site is crucial. Vascular interventional technology is a type of interventional treatment technology. Simply put, it uses human blood vessels as a natural pathway to deliver implants to the diseased cardiovascular site for treatment. Its most intuitive feature is that the implant is large in size, especially interventional heart prosthetic valves, interventional occluders, etc. Therefore, this technology requires the implant to be compressed to a very small diameter in order to be loaded into the delivery catheter. However, implants or biological tissues, polymer materials, etc. attached to implants are easily damaged by excessive extrusion, uneven compression, or local accidental twisting and bending, which ultimately leads to defects in the function of the implant, reduced life, and even inability to perform normal implantation. Therefore, it is very necessary to provide a loading structure for delivering heart valve stents with high safety and stability.

[0003] However, one of the shortcomings of the related technology is that the traditional loading structure usually uses multiple traction ropes to pull the heart valve stent into the guide cover. It is difficult to maintain consistent traction force on the heart valve stent by different traction ropes, which may cause the heart valve stent to tilt during the traction process, thereby generating unnecessary friction, etc., and further damaging the heart valve stent. Summary of the invention

[0004] The utility model aims to solve at least one of the above technical problems.

[0005] In order to solve the above problems, the first purpose of the utility model is to provide a loading structure for delivering a heart valve stent.

[0006] To achieve the first purpose of the present invention, an embodiment of the utility model provides a loading structure for conveying a heart valve stent, which includes: a guide cover, which is a hollow structure; a compression device, which is detachably connected to the guide cover; a heart valve stent, which is provided with a first barb and a second barb; a traction device, which includes: a traction rod, which cooperates with the first barb and the second barb; wherein the traction device pulls the heart valve stent from the compression device to the guide cover.

[0007] The heart valve stent is pulled from the compression device to the guide cover by the traction device, thereby achieving accurate positioning and movement of the heart valve stent, so that the heart valve stent can reach the guide cover safely and accurately. The setting of the compression device allows the heart valve stent to be effectively protected and fixed during transportation, reduces possible displacement and damage, and enhances the overall safety and stability of the loading structure. The combined design of the traction rod and the compression device enables operators to operate and control more conveniently, simplifies the installation process, and improves the convenience of operation. The setting of the traction rod ensures that the traction force on the first barb and the second barb is uniform, avoiding the situation where the uneven force on the first barb and the second barb causes the heart valve stent to tilt during loading and generate unnecessary friction, causing damage to the heart valve stent. Therefore, the cooperation between the traction rod and the barb ensures the stability and controllability of the transportation process.

[0008] In the above technical solution, the traction device also includes: a movable rod, which is connected to the traction rod.

[0009] As a part of the traction device, the movable rod is connected to the traction rod, which can increase the range of motion and flexibility of the operating rod. This mechanism design enables the operator to have more flexible control capabilities when manipulating the loading structure, and can more accurately adjust and position the heart valve stent. Through the connection of the movable rod, the operator can more accurately manipulate the traction device to ensure the accurate positioning and transmission of the heart valve stent, thereby improving the overall stability and safety of the device structure. The traction rod is driven to move by the movable rod, and then the heart valve stent is driven to move by the first barb and the second barb, thereby achieving a traction effect, and the heart valve stent can be pulled from the compression device to the guide cover.

[0010] In any of the above technical solutions, the first barb and the second barb extend in opposite directions.

[0011] The first barb and the second barb extend in opposite directions, and they form a symmetrical structure at the bottom of the heart valve stent. This design can improve the stability of the heart valve stent during loading and reduce the risk of unexpected movement or misalignment. The first barb and the second barb extend in opposite directions to better cooperate with the traction rod, preventing the traction rod from moving up and down, thereby reducing the situation where the traction rod moves abnormally and causes damage to the heart valve stent.

[0012] In any of the above technical solutions, the length of the traction rod is not less than the distance between the first barb and the second barb.

[0013] Ensuring that the length of the traction rod is not less than the distance between the barbs can prevent the traction device from overstretching or twisting during transportation, thereby enhancing the stability of the loading structure and avoiding unnecessary movement and deformation. The appropriate length of the traction rod ensures that the distance between the barbs will not affect the traction of the heart valve stent, avoiding the situation where the traction rod is too short and cannot be pulled smoothly or causes cross obstruction between the barbs. Keeping the length of the traction rod consistent with or longer than the distance between the barbs can ensure that the appropriate tension and position are maintained during the delivery of the heart valve stent, which helps to accurately move the stent to the predetermined position and improve the controllability and accuracy of the operation. By keeping the length of the traction rod not less than the distance between the barbs, the operational risks and errors caused by improper operation can be reduced, ensuring a safer and more reliable delivery process.

[0014] In any of the above technical solutions, the traction device also includes: a driving device, and the driving device is connected to the movable rod.

[0015] The addition of the drive device can improve the operating efficiency, reduce the labor intensity of the operator, shorten the operating time, make the process of transporting the heart valve stent more efficient, and help improve the efficiency and accuracy of the loading operation. The drive device can achieve precise control of the movable rod. The operator can accurately control the movement speed and strength of the movable rod as needed, which helps to achieve precise positioning and movement of the heart valve stent.

[0016] In any of the above technical solutions, the compression device includes several compression platforms, which include: a first port, which is an opening; a second port, which is an opening, which is interconnected with the first port, and whose area is smaller than that of the first port.

[0017] The design of the first port and the second port allows the compression platform to effectively compress the heart valve stent, and by reducing the area of ​​the second port, the compression of the stent is achieved, thereby facilitating transportation and positioning. The first port and the second port are interconnected, and the design of the compression platform has a certain degree of flexibility. This design can flexibly control the degree of compression of the stent as needed to adapt to different situations and requirements. By making the area of ​​the second port smaller than the first port, the compression platform can reduce the overall volume of the loading structure while achieving stent compression, saving space, and facilitating operation and transportation.

[0018] In any of the above technical solutions, the compression device includes n compression stages, the second port of the n-1th compression stage is connected to the first port of the n-1th compression stage, the area of ​​the first port of the n-1th compression stage is larger than the area of ​​the second port of the n-1th compression stage, and the area of ​​the first port of the n-1th compression stage is smaller than the area of ​​the first port of the n-1th compression stage, wherein n is a natural number not less than 2.

[0019] Through the continuous design of n compression platforms, the effect of step-by-step compression of the heart valve stent can be achieved. Each compression platform performs compression according to the set rules, gradually reducing the size of the stent, ensuring that the stent is gradually reduced to the required size during transportation. The step-by-step compression design not only ensures the adaptive changes of the stent during transportation, but also saves space and improves the compactness of the loading structure. The interconnected second port and the first port can form a smooth channel, making the transmission of the stent between the various compression platforms smoother, avoiding blockage and irregular compression caused by poor connection. The area of ​​the first port of the nth compression platform is greater than the area of ​​the second port of the n-1th compression platform, which can ensure that the heart valve stent can smoothly enter the nth compression platform from the n-1th compression platform.

[0020] In any of the above technical solutions, the guide cover includes: a first transition chamber, which is connected to the compression device; a second transition chamber, which is connected to the first transition chamber; and a fixed chamber, which is connected to the second transition chamber.

[0021] The connection design between the chambers ensures that a smooth transmission channel is formed inside the guide cover. It ensures that the heart valve stent moves smoothly during the loading process, avoiding the situation where the transportation is affected by internal blockage or clogging. Through the connection design of the first transition chamber, the second transition chamber and the fixed chamber, the guide cover can be easily connected to the compression device. This enables the loading structure to be quickly and stably connected to other components during operation, ensuring the smoothness of operation. The setting of the fixed chamber being connected to the second transition chamber helps to firmly fix the heart valve stent during the transportation process. This ensures that the stent can stably reach the fixed chamber and is finally fixed by the fixed chamber.

[0022] In any of the above technical solutions, the first transition chamber includes a first cavity opening and a second cavity opening, the first cavity opening is connected to the compression device, the second cavity opening is connected to the second transition chamber, and the area of ​​the first cavity opening is greater than the area of ​​the second cavity opening.

[0023] The first cavity is connected with the compression device, ensuring that the heart valve stent can smoothly enter the guide cover from the compression device. The second cavity is connected with the second transition cavity, ensuring that the heart valve stent can smoothly enter the second cavity from the first cavity.

[0024] In any of the above technical solutions, the first cavity port is connected to the second port of the nth compression stage, and the area of ​​the first cavity port is larger than the area of ​​the second port of the nth compression stage.

[0025] The area of ​​the first cavity port is larger than the area of ​​the second port of the nth compression stage, which can ensure that the heart valve stent can smoothly enter the guide cover from the compression device, avoiding unnecessary collisions during transportation that may cause damage to the heart valve stent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of a loading structure for delivering a heart valve stent according to some embodiments of the present invention;

[0028] Figure 2 A schematic diagram of a compression station according to some embodiments of the present invention;

[0029] Figure 3 Schematic diagram of a heart valve stent and a traction device according to some embodiments of the present invention;

[0030] Figure 4 Another schematic diagram of a heart valve stent and a traction device according to some embodiments of the present invention;

[0031] Figure 5 Schematic diagram of traction devices provided by some embodiments of the utility model;

[0032] Figure 6 Schematic diagram of guide covers according to some embodiments of the present invention.

[0033] in, Figures 1 to 6 The corresponding relationship between the reference numerals and the component names is as follows:

[0034] 100-guide cover, 110-first transition chamber, 111-first chamber opening, 112-second chamber opening, 120-second transition chamber, 130-fixed chamber, 200-compression device, 210-compression platform, 211-first port, 212-second port, 300-heart valve stent, 310-first barb, 320-second barb, 400-traction device, 410-traction rod, 420-movable rod, 430-driving device. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the accompanying drawings. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and therefore, the scope of protection of the utility model is not limited by the specific embodiments disclosed below.

[0036] Refer to the following Figures 1 to 6 The technical solutions of some embodiments of the utility model are described.

[0037] like Figure 1 , Figure 4 as well as Figure 6 As shown, an embodiment of the utility model provides a loading structure for conveying a heart valve stent, which includes: a guide cover 100, which is a hollow structure; a compression device 200, which is detachably connected to the guide cover 100; a heart valve stent 300, which is provided with a first barb 310 and a second barb 320; a traction device 400, which includes: a traction rod 410, which cooperates with the first barb 310 and the second barb 320; wherein the traction device 400 pulls the heart valve stent 300 from the compression device 200 to the guide cover 100.

[0038] In this embodiment, the heart valve stent 300 is first loaded into the compression device 200, and then the traction rod 410 cooperates with the first barb 310 and the second barb 320, and the traction rod 410 drives the first barb 310 and the second barb 320, and then drives the heart valve stent 300 to move. During the movement, the compression device 200 compresses the heart valve stent 300 step by step, and finally reaches the guide cover 100. Among them, the traction rod 410 is a hard material. When the traction rod 410 moves, the movement speed of each part of the traction rod 410 is the same, and then the movement speed of the first barb 310 and the second barb 320 is the same, so as to avoid the heart valve stent 300 from tilting due to the speed difference of different parts, generating unnecessary friction and causing damage to the heart valve stent 300.

[0039] like Figure 5 As shown, the traction device 400 further includes: a movable rod 420 , which is connected to the traction rod 410 ; and a driving device 430 , which is connected to the movable rod 420 .

[0040] The movable rod 420 is connected to the middle section of the traction rod 410 , and the driving device 430 is connected to the movable rod 420 . The driving device 430 can drive the movable rod 420 to perform telescopic or rotational activities. During the cooperation between the traction rod 410 and the first and second barbs 310 and 320, the driving device 430 drives the movable rod 420 and then drives the traction rod 410 to approach the heart valve stent 300 until one end of the traction rod 410 is above the first barb 310 and the other end of the traction rod 410 is below the second barb 320. At this time, the driving device 430 stops extending and retracting the movable rod 420 and rotates the movable rod 420, thereby driving the traction rod 410 to rotate, so that one end of the traction rod 410 is stuck in the first barb 310 and the other end of the traction rod 410 is stuck in the second barb 320. After completing the cooperation, the next step of traction is carried out, by extending and retracting the movable rod 420, the traction rod 410 is driven to move, and then the heart valve stent 300 is driven to move through the first and second barbs 310 and 320.

[0041] like Figure 3 , Figure 4 As shown, the first barb 310 and the second barb 320 extend in opposite directions; the length of the traction rod 410 is not less than the distance between the first barb 310 and the second barb 320 .

[0042] In this embodiment, the bottom of the heart valve stent 300 is a circular structure, and the first barb 310 and the second barb 320 are located on the same diameter of the circular structure, so as to ensure that the pulling force positions of the first barb 310 and the second barb 320 on the heart valve stent 300 are symmetrical, and the heart valve stent 300 is prevented from being excessively tilted during the traction process. The first barb 310 extends upward, and the second barb 320 extends downward. The traction rod 410 is inserted into the first barb 310 and the second barb 320, and the two barbs extend in opposite directions, which can effectively limit the up and down movement of the traction rod 410, thereby improving the stability of the traction process and improving the overall stability and safety of the loading structure.

[0043] like Figure 1 , Figure 2 as well as Figure 6 As shown, the compression device 200 includes several compression stages 210 , and the compression stage 210 includes: a first port 211 , which is an opening; a second port 212 , which is an opening and is interconnected with the first port 211 , and the area of ​​the second port 212 is smaller than that of the first port 211 .

[0044] In this embodiment, the first port 211 of the compression platform 210 has a larger area than the second port 212, and the second port 212 is connected to the first port 211, which can ensure that the heart valve stent 300 passes through the compression platform 210 and is gradually compressed and finally reduced to the size of the second port 212. This design can flexibly control the compression degree of the stent as needed to adapt to different situations and requirements.

[0045] like Figure 1 , Figure 2 As shown, the compression device 200 includes n compression stages 210, the second port 212 of the n-1th compression stage 210 is communicated with the first port 211 of the n-1th compression stage 210, the area of ​​the first port 211 of the n-1th compression stage 210 is larger than the area of ​​the second port 212 of the n-1th compression stage 210, and the area of ​​the first port 211 of the n-1th compression stage 210 is smaller than the area of ​​the first port 211 of the n-1th compression stage 210, wherein n is a natural number not less than 2.

[0046] In this embodiment, the heart valve stent 300 is compressed step by step by n compression stages 210, and the number of compression stages 210 can be flexibly adjusted, thereby adjusting the final compression size of the heart valve stent 300. Among them, the area of ​​the first port 211 of the n-th compression stage 210 is smaller than the area of ​​the first port 211 of the n-1-th compression stage 210, and the area of ​​the first port 211 of the n-th compression stage 210 is larger than the area of ​​the second port 212 of the n-1-th compression stage 210, which can ensure that the heart valve stent 300 enters the n-th compression stage 210 from the n-1-th compression stage 210, and the area of ​​the second port 212 of the n-th compression stage 210 is smaller than the area of ​​the second port 212 of the n-1-th compression stage 210, so that the heart valve stent 300 after passing through the n-th compression stage 210 is smaller in volume than that after being compressed by the n-1-th compression stage 210.

[0047] like Figure 6 As shown, the guide cover 100 includes: a first transition chamber 110 , which is connected to the compression device 200 ; a second transition chamber 120 , which is connected to the first transition chamber 110 ; and a fixed chamber 130 , which is connected to the second transition chamber 120 .

[0048] In this embodiment, the first transition chamber 110 is connected to the compression device 200. The heart valve stent 300 compressed by the compression device 200 can smoothly enter the first transition chamber 110, then enter the second transition chamber 120 through the first transition chamber 110, and finally enter the fixed chamber 130 from the second transition chamber 120, and be locked by the groove in the fixed chamber 130, thereby avoiding the position of the heart valve stent 300 from being offset during the subsequent loading process, resulting in poor loading effect.

[0049] like Figure 6 As shown, the first transition chamber 110 includes a first cavity port 111 and a second cavity port 112. The first cavity port 111 is connected to the compression device 200, and the second cavity port 112 is connected to the second transition chamber 120. The area of ​​the first cavity port 111 is larger than the area of ​​the second cavity port 112. The first cavity port 111 is connected to the second port 212 of the nth compression stage 210, and the area of ​​the first cavity port 111 is larger than the area of ​​the second port 212 of the nth compression stage 210.

[0050] In this embodiment, the area of ​​the first cavity opening 111 is larger than the area of ​​the second cavity opening 112, and the first transition cavity 110 as a whole performs the final compression on the heart valve stent 300, compressing the heart valve stent 300 into the second transition cavity 120, and the volume of the heart valve stent 300 in the second transition cavity 120 no longer changes, and finally enters the fixed cavity 130. The second port 212 of the nth compression stage 210 is connected to the guide cover 100, and the area of ​​the first cavity opening 111 is larger than the area of ​​the second port 212 of the nth compression stage 210, so that the heart valve stent 300 compressed by the entire compression device 200 can smoothly enter the guide cover 100.

[0051] In the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0052] In the description of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it cannot be understood as a limitation on the present invention.

[0053] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] Although the utility model is disclosed as above, the utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the scope defined by the claims.

Claims

1. A loading structure for delivering a heart valve stent, characterized in that: include: A guide cover (100), wherein the guide cover (100) is a hollow structure; A compression device (200), wherein the compression device (200) is detachably connected to the guide cover (100); A heart valve stent (300), wherein the heart valve stent (300) is provided with a first barb (310) and a second barb (320); A traction device (400), the traction device (400) comprising: A traction rod (410), wherein the traction rod (410) cooperates with the first barb (310) and the second barb (320); Wherein, the traction device (400) pulls the heart valve stent (300) from the compression device (200) to the guide cover (100).

2. The loading structure for delivering a heart valve stent according to claim 1, characterized in that: The traction device (400) further comprises: A movable rod (420), wherein the movable rod (420) is connected to the traction rod (410).

3. The loading structure for delivering a heart valve stent according to claim 2, characterized in that: The first barb (310) and the second barb (320) extend in opposite directions.

4. The loading structure for delivering a heart valve stent according to claim 3, characterized in that: The length of the traction rod (410) is not less than the distance between the first barb (310) and the second barb (320).

5. The loading structure for delivering a heart valve stent according to claim 2, characterized in that: The traction device (400) further comprises: A driving device (430) is connected to the movable rod (420).

6. The loading structure for delivering a heart valve stent according to claim 1, characterized in that: The compression device (200) comprises a plurality of compression stages (210). include: A first port (211), wherein the first port (211) is an opening; The second port (212) is an opening, the second port (212) is in communication with the first port (211), and the area of ​​the second port (212) is smaller than that of the first port (211).

7. The loading structure for delivering a heart valve stent according to claim 6, characterized in that: The compression device (200) comprises n compression stages (210), the second port (212) of the n-1th compression stage (210) is communicated with the first port (211) of the n-1th compression stage (210), the area of ​​the first port (211) of the n-1th compression stage (210) is larger than the area of ​​the second port (212) of the n-1th compression stage (210), and the area of ​​the first port (211) of the n-1th compression stage (210) is smaller than the area of ​​the first port (211) of the n-1th compression stage (210), wherein n is a natural number not less than 2.

8. The loading structure for delivering a heart valve stent according to claim 7, characterized in that: The guide cover (100) comprises: A first transition chamber (110), the first transition chamber (110) being in communication with the compression device (200); A second transition chamber (120), the second transition chamber (120) being in communication with the first transition chamber (110); A fixed cavity (130), wherein the fixed cavity (130) is in communication with the second transition cavity (120).

9. The loading structure for delivering a heart valve stent according to claim 8, characterized in that: The first transition chamber (110) comprises a first chamber opening (111) and a second chamber opening (112), wherein the first chamber opening (111) is connected to the compression device (200), and the second chamber opening (112) is connected to the compression device (200). The first cavity opening (111) is in communication with the second transition cavity (120), and the area of ​​the first cavity opening (111) is greater than the area of ​​the second cavity opening (112).

10. The loading structure for delivering a heart valve stent according to claim 9, characterized in that: The first cavity opening (111) is in communication with the second port (212) of the nth compression stage (210), and the area of ​​the first cavity opening (111) is greater than the area of ​​the second port (212) of the nth compression stage (210).

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