Catheter assembly for conveying heart valve stent and conveying device

Abstract

The utility model relates to the technical field of heart valve stents, in particular to a catheter assembly for conveying a heart valve stent and a conveying device, and aims to solve the problem that the matching of the heart valve stent and the catheter assembly is not convenient enough. The embodiment of the utility model provides a catheter assembly for conveying a heart valve stent, which comprises an outer tube, an inner tube and an inner tube, the wire guide shaft is fixedly connected with the conveying device, and the outer tube can move relative to the wire guide shaft; the stent fixing block is arranged in the outer tube and matched with the outer tube to form a valve fixing cavity, and a first side plate and a second side plate which extend towards the valve fixing cavity are arranged on the stent fixing block; wherein the first side plate and the second side plate are oppositely arranged, and the first side plate and the second side plate are each provided with a first protruding block extending towards the inner wall of the outer pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of heart valve stents, and in particular to a catheter component and a conveying device for conveying the heart valve stent. Background Art

[0002] The balloon-expandable artificial heart valve is a biological valve, and its intervention method is to fix the biological valve separately on a plastically deformable stent, reduce the diameter after radial compression on a balloon, and then pressurize the balloon to expand and fix the stent to achieve a working state. During the delivery process, the heart valve needs to be delivered through a catheter assembly. The heart valve stent is prone to falling when it is matched with the catheter assembly, and cannot be accurately matched with the stent fixing block, resulting in a long preparation time for the heart valve stent during installation. In addition, the heart valve stent that has not been successfully fixed is prone to slide along the catheter, which is not conducive to subsequent fixation work. Utility Model Content

[0003] The utility model solves the problem that the heart valve stent and the catheter assembly are not convenient enough to be matched.

[0004] In order to solve the above problems, an embodiment of the utility model provides a catheter assembly for conveying a heart valve stent, the catheter assembly comprising: an outer tube, the outer tube is cooperatively connected with a conveying device; a guide wire shaft, the guide wire shaft is fixedly connected with the conveying device, and the outer tube can move relative to the guide wire shaft; a stent fixing block, the stent fixing block is arranged in the outer tube, and cooperates with the outer tube to form a valve fixing cavity, and the stent fixing block is provided with a first side plate and a second side plate extending in the direction of the valve fixing cavity; wherein the first side plate and the second side plate are arranged opposite to each other, and the first side plate and the second side plate are both provided with a first protrusion extending toward the inner wall of the outer tube.

[0005] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the outer tube, the guide wire shaft and the stent fixing block cooperate with each other to form a valve fixing cavity capable of fixing the heart valve stent; the setting of the guide wire shaft also enables the outer tube to move relative to the stent fixing block, making the installation of the heart valve stent more convenient; the setting of the first side plate and the second side plate has a pre-positioning effect when the heart valve stent is installed, allowing the staff to quickly install the heart valve stent; the setting of the first protrusions on both sides makes the installation of the heart valve stent more secure, and improves the stability of the catheter assembly in installing the heart valve stent.

[0006] In one embodiment of the utility model, the catheter assembly further includes: a second protrusion, there is only one second protrusion, and the second protrusion is arranged on the first side plate or the second side plate; wherein the fixing port of the heart valve stent can pass through the first gap and be sleeved on the first protrusion.

[0007] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: the setting of the second protrusion can timely control the movement of the heart valve stent when the heart valve stent is separated from the first protrusion, thereby improving the efficiency of re-installation of the heart valve stent; the setting of the first gap can prevent the second protrusion from affecting the positioning of the first protrusion, thereby making the initial installation of the heart valve stent more convenient; the setting of a single second protrusion can also save the overall material consumption of the stent fixing block and save production costs.

[0008] In one embodiment of the utility model, the first protrusion and the second protrusion have a second gap in the moving direction of the outer tube, and the second gap cooperates with the inner wall of the outer tube to form an accommodating cavity, and at least part of the heart valve stent can enter the accommodating cavity.

[0009] Compared with the prior art, the technical effect achieved by adopting this technical solution is that the setting of the accommodating cavity fully considers the structure of the heart valve stent, so that the second protrusion does not affect the initial installation of the heart valve stent, and prevents the heart valve stent from slipping after installation.

[0010] In one embodiment of the present invention, a line connecting the center of the first protrusion and the center of the second protrusion is inclined relative to the moving direction of the outer tube.

[0011] Compared with the prior art, the technical effect achieved by adopting this technical solution is that the first protrusion and the second protrusion are relatively inclined, so that the second protrusion can prevent the heart valve stent from sliding off while further avoiding the fixing mouth from being set on the second protrusion.

[0012] In one embodiment of the present invention, the first protrusion is in the shape of a boss, and the area of ​​the first protrusion close to the inner wall of the outer tube is smaller than the area of ​​the first protrusion close to the first side plate or the second side plate.

[0013] Compared with the prior art, the technical effect achieved by adopting this technical solution is: the first protrusion is set in a boss shape, so that when the outer tube moves to the specified position, the heart valve stent can be smoothly separated from the first protrusion and reach the specified position to work.

[0014] In an embodiment of the present invention, the second protrusion further comprises: a guide surface, which is arranged on a side of the second protrusion away from the first protrusion, and when the fixing port contacts the guide surface, the fixing port can move toward the first protrusion along the guide surface.

[0015] Compared with the prior art, the technical effect achieved by adopting this technical solution is: the setting of the guide surface provides guidance before the heart valve stent cooperates with the first protrusion, so that the heart valve stent and the second protrusion will not abut against each other when they contact, but can smoothly move the heart valve stent toward the direction of the first protrusion, making the installation of the heart valve stent and the first protrusion more convenient.

[0016] In one embodiment of the utility model, the stent fixing block also includes: a fixing hole, which is arranged at the center of the stent fixing block, and the stent fixing block is connected to the delivery device through the fixing hole. The catheter assembly also includes: a conical head, which is movably connected to the outer tube, and a valve fixing cavity is formed between the conical head, the outer tube and the stent fixing block; an inner tube, which is arranged inside the outer tube, and at least part of the inner tube passes through the conical head of the stent fixing block in sequence, and one end of the inner tube is flush with one end of the conical head, and physiological saline can flow out through the inner tube.

[0017] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: the setting of the fixing hole makes the connection between the delivery device and the stent fixing block more secure; the setting of the inner tube enables the delivery device to output physiological saline in real time, making the fixation of the heart valve stent more convenient.

[0018] In one embodiment of the present invention, a delivery device for a heart valve stent is also provided. The catheter assembly described in the above embodiment is applied to the delivery device. The delivery device has all the technical features of the above catheter assembly, which will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings to be used in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of the conveying device of the utility model;

[0021] Figure 2 for Figure 1 Cross-sectional view at AA in the middle;

[0022] Figure 3 for Figure 2 Enlarged view of point C in the middle;

[0023] Figure 4 This is a schematic diagram of the overall structure of the bracket fixing block of the utility model;

[0024] Figure 5 for Figure 4 Side view of

[0025] Figure 6 It is a partial structural schematic diagram of the bracket fixing block of the utility model;

[0026] Figure 7 This is a schematic diagram of the overall structure of the valve stent of the utility model.

[0027] Description of reference numerals:

[0028] 100, conveying device; 110, outer tube; 120, guide wire shaft; 130, stent fixing block; 131, fixing hole; 140, first side plate; 150, second side plate; 160, first protrusion; 170, second protrusion; 171, guide surface; 180, valve fixing cavity; 190, accommodating cavity; 200, conical head; 210, inner tube; 300, valve stent; 310, fixing port. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] [First embodiment]

[0031] See also Figures 1 to 7 In a specific embodiment, the utility model provides a catheter assembly for conveying a heart valve stent 300, the catheter assembly comprising: an outer tube 110, the outer tube 110 is connected with the conveying device 100; a guide wire shaft 120, the guide wire shaft 120 is fixedly connected with the conveying device 100, and the outer tube 110 can move relative to the guide wire shaft 120; a stent fixing block 130, the stent fixing block 130 is arranged in the outer tube 110, and cooperates with the outer tube 110 to form a valve fixing cavity 180, and the stent fixing block 130 is provided with a first side plate 140 and a second side plate 150 extending in the direction of the valve fixing cavity 180; wherein the first side plate 140 and the second side plate 150 are arranged opposite to each other, and the first side plate 140 and the second side plate 150 are both provided with a first protrusion 160 extending toward the inner wall of the outer tube 110.

[0032] The conveying device 100 is used to convey the heart valve stent 300. The front end of the outer tube 110 is provided with a conical head 200. The conical head 200, the outer tube 110 and the stent fixing block 130 together form a valve fixing cavity 180. When the valve enters the valve fixing cavity 180, it is fixed by the stent fixing block 130. The first side plate 140 and the second side plate 150 both extend in the direction of the conical head 200. The middle of the heart valve stent 300 is hollow. During installation, the first side plate 140 and the second side plate 150 can both pass through the middle position of the heart valve stent 300. The first side plate 140 and the second side plate 150 are both provided with a first bump 160. The positions of the two first bumps 160 are symmetrically arranged relative to the center of the outer tube 110. After the heart valve stent 300 enters the outer tube 110, it is fixed by the two first bumps 160.

[0033] When the delivery device 100 is working, the heart valve stent 300 and the first protrusion 160 are first fixed, and then the conical head 200 enters the human body to reach the designated position. When the conical head 200 reaches the designated position, the outer tube 110 begins to move away from the conical head 200 under the control of the guide wire shaft 120, that is, the valve fixing cavity 180 gradually opens. When the outer tube 110 above the first protrusion 160 is opened, the heart valve stent 300 is separated from the first protrusion 160 and installed to the designated position to start working.

[0034] The outer tube 110, the guidewire shaft 120 and the stent fixing block 130 cooperate with each other to form a valve fixing cavity 180 capable of fixing the heart valve stent 300. The setting of the guidewire shaft 120 also allows the outer tube 110 to move relative to the stent fixing block 130, making the installation of the heart valve stent 300 more convenient. The setting of the first side plate 140 and the second side plate 150 has a pre-positioning effect when the heart valve stent 300 is installed, allowing the staff to quickly install the heart valve stent 300. The setting of the first protrusions 160 on both sides makes the installation of the heart valve stent 300 more secure, thereby improving the stability of the catheter assembly in installing the heart valve stent 300.

[0035] [Second embodiment]

[0036] In a specific embodiment, the catheter assembly also includes: a second protrusion 170, there is only one second protrusion 170, and the second protrusion 170 is arranged on the first side plate 140 or the second side plate 150; wherein the fixing port 310 of the heart valve stent 300 can pass through the first gap and be sleeved on the first protrusion 160.

[0037] The second protrusion 170 can be set on the first side plate 140 or on the second side plate 150. The height of the second protrusion 170 protruding toward the outer tube 110 is less than the height of the first protrusion 160, that is, a first gap is formed between the upper surface of the second protrusion 170 and the inner wall of the outer tube 110. When installing, the heart valve stent 300 can smoothly pass through the second protrusion 170 to reach the first protrusion 160 without affecting the installation of the heart valve stent 300 and the first protrusion 160.

[0038] After the fixing port 310 of the heart valve stent 300 is sleeved on the first protrusion 160, the heart valve stent 300 has a tendency to slide outward, that is, when the outer tube 110 does not cover the top of the first protrusion 160 by moving, the heart valve stent 300 is easily separated from the first protrusion 160, and the separated heart valve stent 300 is easy to slide along the first side plate 140, affecting the efficiency of reinstallation of the heart valve stent 300. It can be understood that the heart valve stent 300 that slides out will not move too far, and the second protrusion 170 can prevent the heart valve stent 300 from sliding along the first side plate 140 or the second side plate 150 at this time, so that the staff can quickly grab the heart valve stent 300 and reinstall it.

[0039] The setting of the second protrusion 170 can timely control the movement of the heart valve stent 300 when the heart valve stent 300 is separated from the first protrusion 160, thereby improving the efficiency of reinstallation of the heart valve stent 300. The setting of the first gap can prevent the second protrusion 170 from affecting the positioning of the first protrusion 160, making the initial installation of the heart valve stent 300 more convenient. The setting of a single second protrusion 170 can also save the overall material consumption of the stent fixing block 130 and save manufacturing costs.

[0040] [Third embodiment]

[0041] In a specific embodiment, the first protrusion 160 and the second protrusion 170 have a second gap in the moving direction of the outer tube 110 , and the second gap cooperates with the inner wall of the outer tube 110 to form an accommodating cavity 190 , and at least part of the heart valve stent 300 can enter the accommodating cavity 190 .

[0042] The first protrusion 160 and the second protrusion 170 are spaced apart in the extension direction of the side plate, and the heart valve stent 300 as a whole is a grid-like hollow structure. When the heart valve stent 300 is separated from the first protrusion 160, when the heart valve stent 300 as a whole moves along the direction of the first side plate 140 or the second side plate 150, other hollow positions on the heart valve stent 300 can be mounted on the second protrusion 170 to prevent the heart valve stent 300 from continuing to slide.

[0043] The setting of the accommodating cavity 190 fully considers the structure of the heart valve stent 300 , so that the second protrusion 170 does not affect the initial installation of the heart valve stent 300 , thereby preventing the heart valve stent 300 from slipping after installation.

[0044] [Fourth embodiment]

[0045] In a specific embodiment, a line connecting the center of the first protrusion 160 and the center of the second protrusion 170 is inclined relative to the moving direction of the outer tube 110 .

[0046] The first protrusion 160 and the second protrusion 170 are both disposed on the first side plate 140, and the first protrusion 160 is disposed at the center position of the first side plate 140. When the bracket fixing block 130 is installed, the line connecting the center position of the second protrusion 170 and the center position of the first protrusion 160 is inclined relative to the moving direction of the outer tube 110, and the inclination angle is 5° to 10°.

[0047] If the second protrusion 170 and the first protrusion 160 are arranged parallel to the moving direction of the outer tube 110, after the heart valve stent 300 slides out, the fixing block can be easily directly mounted on the second protrusion 170. This situation can be avoided by the inclined setting, and other hollow positions on the heart valve stent 300 can be easily removed after being mounted on the second protrusion 170, which will not affect the subsequent installation of the heart valve stent 300.

[0048] The first protrusion 160 and the second protrusion 170 are arranged to be inclined relative to each other, so that the second protrusion 170 can prevent the heart valve stent 300 from sliding down and further prevent the fixing opening 310 from being sleeved on the second protrusion 170 .

[0049] [Fifth embodiment]

[0050] In a specific embodiment, the first protrusion 160 is in a boss shape, and the area of ​​the first protrusion 160 close to the inner wall of the outer tube 110 is smaller than the area of ​​the first protrusion 160 close to the first side plate 140 or the second side plate 150 .

[0051] The first protrusion 160 is usually a frustum, the upper end area of ​​the frustum is smaller than the opening size of the fixing port 310, and the lower end area of ​​the frustum is larger than the opening size of the fixing port 310. When the fixing port 310 is sleeved on the first protrusion 160, the fixing port 310 is usually located in the middle position of the first protrusion 160 and has a tendency to move upward. The fixing port 310 is prevented from slipping by the stopper of the outer tube 110.

[0052] The first protrusion 160 is configured to be in a boss shape, so that when the outer tube 110 moves to a designated position, the heart valve stent 300 can be smoothly separated from the first protrusion 160 and reach the designated position to work.

[0053] [Sixth embodiment]

[0054] In a specific embodiment, the second protrusion 170 further includes: a guide surface 171 , which is disposed on a side of the second protrusion 170 away from the first protrusion 160 , and when the fixing opening 310 contacts the guide surface 171 , the fixing opening 310 can move toward the first protrusion 160 along the guide surface 171 .

[0055] The guide surface 171 is arranged on the side of the second protrusion 170 away from the first protrusion 160. The fixing port 310 of the heart valve stent 300 will pass through the second protrusion 170 before cooperating with the first protrusion 160. In some cases, the heart valve stent 300 will contact the second protrusion 170. At this time, under the action of the guide surface 171, the height of the heart valve stent 300 will be increased and move toward the direction of the first protrusion 160.

[0056] The guide surface 171 is provided to provide guidance before the heart valve stent 300 cooperates with the first protrusion 160, so that the heart valve stent 300 and the second protrusion 170 will not abut against each other when in contact, but can smoothly move the heart valve stent 300 toward the first protrusion 160, making the installation of the heart valve stent 300 and the first protrusion 160 more convenient.

[0057] [Seventh embodiment]

[0058] In a specific embodiment, the stent fixing block 130 also includes: a fixing hole 131, which is arranged at the center of the stent fixing block 130, and the stent fixing block 130 is connected to the delivery device 100 through the fixing hole 131. The catheter assembly also includes: a conical head 200, which is movably connected to the outer tube 110, and a valve fixing cavity 180 is formed between the conical head 200, the outer tube 110 and the stent fixing block 130; an inner tube 210, which is arranged inside the outer tube 110, and at least part of the inner tube 210 passes through the conical head 200 of the stent fixing block 130 in sequence, and one end of the inner tube 210 is flush with one end of the conical head 200, and physiological saline can flow out through the inner tube 210.

[0059] A fixing hole 131 is provided at the center of the stent fixing block 130, and the inner tube 210 passes through the stent fixing block 130 and the conical head 200 through the fixing hole 131, and can transport liquid through the tip of the conical head 200. A slot is provided on the side of the conical head 200 close to the stent fixing block 130, and the outer tube 110 is movably connected to the slot. When the heart valve stent 300 needs to be installed, the outer tube 110 is separated from the slot, so that the staff can smoothly fix the heart valve stent 300 on the first protrusion 160. After the fixation is completed, the outer tube 110 moves toward the slot under the action of the guide wire shaft 120 and matches the slot. The conical head 200 and the outer tube 110 are combined to form a valve accommodating cavity 190. When the conical head 200 reaches the specified position, the inner tube 210 needs to spray physiological saline to assist the installation of the heart valve stent 300. When the heart valve stent 300 is placed, the position of the conical head 200 remains stationary, and the outer tube 110 moves away from the conical head 200. After the outer tube 110 moves away, the heart valve stent 300 on the first protrusion 160 is separated from the first protrusion 160 and reaches the working position. After the heart valve stent 300 is installed, the conical head 200 and the conveying device 100 are pulled out from the hollow part of the heart valve stent 300 as a whole.

[0060] The setting of the fixing hole 131 makes the connection between the delivery device 100 and the stent fixing block 130 more secure, and the setting of the inner tube 210 enables the delivery device 100 to output physiological saline in real time, making the fixation of the heart valve stent 300 more convenient.

[0061] [Tenth embodiment]

[0062] In a specific embodiment, the utility model also provides a delivery device 100 for a heart valve stent 300, and the catheter assembly described in the above embodiment is applied to the delivery device 100. The delivery device 100 has all the technical features of the above catheter assembly, which will not be described one by one here.

[0063] 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 catheter assembly for delivering a heart valve stent (300), characterized in that: The catheter assembly comprises: An outer tube (110), wherein the outer tube (110) is cooperatively connected to the conveying device (100); A guide wire shaft (120), wherein the guide wire shaft (120) is fixedly connected to the conveying device (100), and the outer tube (110) is movable relative to the guide wire shaft (120); a support fixing block (130), the support fixing block (130) being arranged in the outer tube (110) and cooperating with the outer tube (110) to form a valve fixing cavity (180), the support fixing block (130) being provided with a first side plate (140) and a second side plate (150) extending in the direction of the valve fixing cavity (180); The first side plate (140) and the second side plate (150) are arranged opposite to each other, and both the first side plate (140) and the second side plate (150) are provided with a first protrusion (160) extending toward the inner wall of the outer tube (110).

2. The catheter assembly according to claim 1, characterized in that The catheter assembly further comprises: A second convex block (170), wherein there is only one second convex block (170), and the second convex block (170) is arranged on the first side plate (140) or the second side plate (150); The fixing opening (310) of the heart valve stent (300) is capable of passing through the first gap and being sleeved on the first protrusion (160).

3. The catheter assembly according to claim 2, characterized in that The first protrusion (160) and the second protrusion (170) have a second gap in the moving direction of the outer tube (110), and the second gap cooperates with the inner wall of the outer tube (110) to form a receiving cavity (190), and at least a portion of the heart valve stent (300) can enter the receiving cavity (190).

4. The catheter assembly according to claim 2, characterized in that A line connecting the center of the first protrusion (160) and the center of the second protrusion (170) is inclined relative to the moving direction of the outer tube (110).

5. The catheter assembly according to claim 4, characterized in that The first protrusion (160) is in the shape of a boss, and the area of ​​the first protrusion (160) close to the inner wall of the outer tube (110) is smaller than the area of ​​the first protrusion (160) close to the first side plate (140) or the second side plate (150).

6. The catheter assembly according to claim 4, characterized in that The second projection (170) further comprises: A guide surface (171), wherein the guide surface (171) is arranged on a side of the second protrusion (170) away from the first protrusion (160), and when the fixing port (310) contacts the guide surface (171), the fixing port (310) can move along the guide surface (171) toward the first protrusion (160).

7. The catheter assembly according to any one of claims 1 to 6, characterized in that: The support fixing block (130) further comprises: A fixing hole (131), wherein the fixing hole (131) is arranged at the center of the bracket fixing block (130), and the bracket fixing block (130) is connected to the conveying device (100) through the fixing hole (131).

8. The catheter assembly according to any one of claims 1 to 6, characterized in that: The catheter assembly further comprises: a conical head (200), wherein the conical head (200) is movably connected to the outer tube (110), and the valve fixing cavity (180) is formed between the conical head (200), the outer tube (110) and the stent fixing block (130); An inner tube (210), wherein the inner tube (210) is disposed inside the outer tube (110), and at least a portion of the inner tube (210) passes through the support fixing block (130) and the conical head (200) in sequence.

9. The catheter assembly according to claim 8, characterized in that One end of the inner tube (210) is flush with one end of the conical head (200), and physiological saline can flow out through the inner tube (210).

10. A delivery device (100) for a heart valve stent (300), characterized in that: The catheter assembly according to any one of claims 1 to 9 is arranged in the delivery device (100).

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