Fixing assembly and conveying device

Abstract

The utility model provides a fixing assembly and a conveying device, the fixing assembly is used for fixing a valve support, the fixing assembly comprises a fixing head body, an inner tube is sleeved in the fixing head body, and the fixing head body is connected with the inner tube; the supporting piece is connected with the fixing head body; the fixing piece is arranged on the supporting piece in a protruding mode, a matching groove is formed in the fixing piece, and the matching groove is matched with the matching protrusion on the valve support; wherein the valve stent is fixed to the inner tube through the fixing piece. The utility model solves the technical problems in the prior art that an implant is easy to incline, damage, twist and sink when the valve support and the fixing head are assembled.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly to a fixing component and a conveying device. Background Art

[0002] Transcatheter Aortic Valve Implantation (TAVI), or Transcatheter Aortic Valve Replacement (TAVR); an interventional catheter is sent through the femoral artery, and the artificial heart valve is conveyed to the aortic valve area and opened, thereby completing the implantation of the artificial valve and restoring the valve function. This operation does not require thoracotomy, so it has less trauma and a quick postoperative recovery, and needs to be performed by experienced cardiovascular physicians and surgeons.

[0003] During the operation, during the process of loading and releasing the implant (that is, the artificial heart valve stent), a specific structure is required to be fixed to the corresponding structure of the conveyor by means of shape fitting or wire pulling, etc. It can be fixed at one end or both ends, so as to realize the stable pressing and releasing of the artificial heart valve by the conveyor. This specific structure on the implant is called a lug, and the corresponding structure on the conveying system is called a fixing head.

[0004] Common fixing heads are generally frustum or wedge-shaped bodies with grooves, and the shape of the lugs on the implant matches the grooves, and they are connected by shape fitting. In clinical applications, the existing implant loading process is that after partial pressing of the implant, the lugs are fixed in the grooves of the fixing head, and then the catheter is driven forward to gradually cover the implant completely. During the whole loading process, especially for circumferentially asymmetric valve stents, due to poor force uniformity, the implant is prone to tilt and damage. At the same time, during the release process, the implant may also be distorted, indented, damaged or even unable to be used normally.

[0005] However, in the actual construction process, there is such a problem: in the prior art, the assembly of the valve stent and the fixing head is prone to problems such as implant tilt, damage, distortion and indentation. Summary of the Utility Model

[0006] The utility model solves the technical problem that the assembly of the valve stent and the fixing head in the prior art is prone to implant tilt, damage, distortion and indentation.

[0007] To solve the above problems, the present utility model provides a fixing assembly for fixing a valve stent. The fixing assembly includes: a fixing head body, an inner tube is sleeved inside the fixing head body, and the fixing head body is connected to the inner tube; a support member connected to the fixing head body; a fixing member protruding on the support member, and a mating groove is provided on the fixing member, and the mating groove mates with a mating protrusion on the valve stent; wherein, the valve stent is fixed to the inner tube through the fixing member.

[0008] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The fixing assembly includes a fixing head body, a support member and a fixing member. The fixing head body is directly sleeved and fixed on the outer surface of the inner tube. The support member is connected to the fixing head body and is in the shape of a thin sheet, and a hollow installation space is formed radially between it and the outer tube, that is, there is a gap between the support member and the inner tube. The hollow installation space can be used to accommodate the valve stent, and the support member provides a supporting force for the valve stent to prevent the valve stent from sinking inwards; the fixing member protrudes on the outer surface of the support member for fixing the hanging ring structure of the valve stent. Setting the fixing member as a cylindrical structure can make the fixing section of the fixing member and the valve stent circular, improve the smoothness of the contact surface, reduce the friction between the fixing member and the hanging ring structure, and prevent the hanging ring structure from deforming. However, in the prior art, the cylindrical fixing member is prone to cause the valve stent to tilt and twist. Therefore, a mating groove is opened on the fixing member, and a mating protrusion that mates with the mating groove is provided on the hanging ring of the valve stent. At the same time, the length direction of the mating groove is the same as the radial direction of the inner tube or the same as the circumferential direction of the inner tube, further preventing the valve stent from tilting during the loading and release process.

[0009] In an example of the present utility model, the fixing member is cylindrical, and the axial direction of the fixing member and the radial direction of the inner tube are on the same straight line.

[0010] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: Setting the fixing member as a cylindrical structure can make the fixing section of the fixing member and the valve stent circular, improve the smoothness of the contact surface, reduce the friction between the fixing member and the hanging ring structure, and the axial direction of the fixing member and the radial direction of the inner tube are on the same straight line. To a certain extent, the axial direction of the fixing member is also the height direction of the fixing member. By increasing the height direction of the fixing member, the stability of the assembly of the valve stent and the fixing member can be increased, and the risk of the valve stent slipping out of the fixing member can be reduced.

[0011] In an example of the present utility model, the mating groove is recessed along a first direction and penetrates along a second direction on the support member; wherein, the first direction is the same as the axial direction of the fixing member, and the second direction is the same as the radial direction of the fixing member.

[0012] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The supporting member is provided with a mating groove that is recessed in the first direction and penetrates in the second direction. Thus, the mating protrusion of the valve stent can be mated with the mating groove in the first direction, and the through setting in the second direction can increase the contact area between the fixing member and the valve stent, thereby improving the assembly stability.

[0013] In an example of the present utility model, the outer surface of the fixing member on the side away from the supporting member is an arc structure.

[0014] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By optimizing the structure of the fixing member, the smoothness of the outer surface of the fixing member on the side away from the supporting member is improved to reduce the friction force when the fixing member passes through human tissues, and reduce the damage to human tissues by the fixing member during the movement of the conveying device driving the fixing member after the valve stent is released.

[0015] In an example of the present utility model, in the cross-section of the fixing member along the second direction, the mating groove is arc-shaped.

[0016] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By optimizing the structure of the mating groove, the friction force of the direct connection between the valve and the fixing component is reduced, and the possibility of damage to the valve stent is further reduced.

[0017] In an example of the present utility model, a gap is formed between the supporting member and the inner tube.

[0018] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: A gap is formed between the supporting member and the inner tube, providing space for the installation of the valve stent.

[0019] In an example of the present utility model, the supporting member is in the shape of a circular ring sheet or an arc sheet.

[0020] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The supporting member being in the shape of a circular ring sheet means that the projection of the supporting member in the circumferential direction is circular; the supporting member being in the shape of an arc sheet means that the projection of the supporting member in the circumferential direction is arc-shaped. The supporting member is not limited to the shape of a circular ring sheet or an arc sheet, and its shape is determined according to the structure of the valve stent it needs to support, as long as it ensures that the supporting member contacts the non-anchoring rod at the top of the valve stent frame to provide a supporting force for the valve stent and prevent the valve stent from collapsing.

[0021] In an example of the present utility model, the fixing member and the supporting member are connected through a first arc surface.

[0022] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: Increase the contact area between the fixing member and the supporting member and improve the connection stability.

[0023] In an example of the present utility model, the fixed head body, the support member, and the fixing member are integrally formed.

[0024] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: the fixed head body, the support member, and the fixing member are integrally formed, the manufacturing process is simple, and the strength and firmness of the fixing assembly are improved, making the structure of the fixing assembly more compact.

[0025] On the other hand, the present utility model also provides a conveying device, including an inner tube and a fixed head, and the fixed head is sleeved on the outer surface of the distal end of the inner tube.

[0026] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: the conveying device in this embodiment has all the beneficial effects of the fixed head in any embodiment of the present utility model, which will not be elaborated here.

[0027] After adopting the technical solution of the present utility model, the following technical effects can be achieved:

[0028] (1) A mating groove is provided on the fixing member, and a mating protrusion that mates with the mating groove is provided on the hanging ring of the valve stent. At the same time, the length direction of the mating groove is the same as the radial direction of the inner tube or the circumferential direction of the inner tube, further avoiding the inclination of the valve stent during the loading and releasing processes;

[0029] (2) The support member provides a supporting force for the valve stent to prevent the valve stent from indenting;

[0030] (3) The mating protrusion of the valve stent can mate with the mating groove in the first direction, and the through setting in the second direction can increase the contact area between the fixing member and the valve stent, thereby improving the assembly stability. Description of the Drawings

[0031] Figure 1 It is a schematic structural diagram of a fixing assembly provided in Embodiment 1 of the present utility model;

[0032] Figure 2 It is Figure 1 a schematic structural diagram of another perspective of the fixing assembly in

[0033] Figure 3 It is a schematic structural diagram of a conveying device provided in Embodiment 2 of the present utility model;

[0034] Figure 4 It is Figure 3 an exploded view of a part of the conveying device in

[0035] Figure 5 It is Figure 4 a partial enlarged view of part A in

[0036] Description of the Reference Numerals:

[0037] 10 - Delivery device; 100 - Fixing component; 110 - Fixing head body; 120 - Support member; 130 - Fixing member; 140 - Matching groove; 200 - Catheter assembly; 210 - Outer tube; 220 - Inner tube; 300 - Tapered head. Detailed implementation manners

[0038] To make the above - mentioned objects, features and advantages of the present utility model more obvious and understandable, the technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0039]

Embodiment 1

[0040] Refer to Figure 1 - Figure 2 , this embodiment provides a fixing component 100 for fixing a valve stent. The fixing component 100 includes: a fixing head body 110, an inner tube 220 is sleeved inside the fixing head body 110, and the fixing head body 110 is connected to the inner tube 220; a support member 120, the support member 120 is connected to the fixing head body 110; a fixing member 130, the fixing member 130 protrudes on the support member 120, and a matching groove 140 is provided on the fixing member 130, and the matching groove 140 cooperates with a matching protrusion on the valve stent; wherein, the valve stent is fixed to the inner tube 220 through the fixing member 130.

[0041] In a specific embodiment, the direction of D1 is the same as the axial direction of the fixing member 130 and the radial direction of the inner tube 220, which is the first direction; the direction of D2 is the same as the radial direction of the inner tube 220, which is the second direction; the direction of D3 is the same as the axial direction of the inner tube 220, which is the third direction, and the directions of D1, D2 and D3 are perpendicular to each other. In the prior art, during the process of loading and releasing the valve stent, the valve stent needs to be assembled to the fixing head on the delivery device 10 to realize the fixation of the valve stent and the delivery device 10. However, in actual use, due to the poor uniformity of the force on the valve stent, the valve stent is prone to tilt, be damaged, be distorted and be indented. At the same time, the stability during the fixation of the valve stent and the fixing head is poor. In the existing patents, generally, the delivery catheter, the implant or the loading tool is improved, the scheme is complex, the cycle is long and the cost is high; while the role of the fixing head is ignored. Therefore, this application provides a fixing component 100 for assembling with the valve stent, reducing the possibility of the valve stent tilting, being damaged, being distorted and being indented, and at the same time improving the stability between the valve stent and the fixing component 100.

[0042] Specifically, the catheter assembly 200 includes an inner tube 220 and an outer tube 210. The inner tube 220 and the outer tube 210 are coaxially arranged. The fixing assembly 100 is located in the internal space formed by the outer tube 210 and the inner tube 220. The fixing assembly 100 is sleeved on the outer surface of the distal end of the inner tube 220, and the outer tube 210 is sleeved on the outer surface of the fixing assembly 100. The fixing assembly 100 includes a fixing head body 110, a support member 120, and a fixing member 130. The fixing head body 110 is directly sleeved and fixed on the outer surface of the inner tube 220. The support member 120 is connected to the fixing head body 110 and is in the shape of a thin sheet. A hollow installation space is radially formed between the support member 120 and the outer tube 210, that is, there is a gap between the support member 120 and the inner tube 220. The hollow installation space can be used to accommodate the valve stent, and the support member 120 provides a supporting force for the valve stent to prevent the valve stent from collapsing. The fixing member 130 protrudes on the outer surface of the support member 120 for fixing the hanging ring structure of the valve stent. Setting the fixing member 130 as a cylindrical structure can make the fixing cross-section of the fixing member 130 and the valve stent circular, improve the smoothness of the contact surface, reduce the friction between the fixing member 130 and the hanging ring structure, and prevent the hanging ring structure from deforming. However, the cylindrical fixing member 130 is likely to cause the valve stent to tilt and twist. Therefore, a mating groove 140 is formed on the fixing member 130, and a mating protrusion that mates with the mating groove 140 is provided on the hanging ring of the valve stent. At the same time, the length direction of the mating groove 140 is the same as the radial direction of the inner tube 220 or the circumferential direction of the inner tube 220, further preventing the valve stent from tilting during the loading and releasing processes.

[0043] Further, the fixing member 130 is cylindrical, and the axial direction of the fixing member 130 and the radial direction of the inner tube 220 are on the same straight line.

[0044] Specifically, setting the fixing member 130 as a cylindrical structure can make the fixing cross-section of the fixing member 130 and the valve stent circular, improve the smoothness of the contact surface, reduce the friction between the fixing member 130 and the hanging ring structure, and the axial direction of the fixing member 130 and the radial direction of the inner tube 220 are on the same straight line. The axial direction of the fixing member 130 is also the height direction of the fixing member 130 to a certain extent. By increasing the height direction of the fixing member 130, the stability of the assembly of the valve stent and the fixing member 130 can be increased, and the risk of the valve stent coming off the fixing member 130 can be reduced.

[0045] Further, the mating groove 140 is recessed along a first direction and penetrates through the support member 120 along a second direction; wherein, the first direction is the same as the axial direction of the fixing member 130, and the second direction is the same as the radial direction of the fixing member 130.

[0046] Specifically, the support member 120 is provided with a mating groove 140 that is recessed in the first direction and penetrates in the second direction. Thus, the mating protrusion of the valve stent can be mated with the mating groove 140 in the first direction, and the through - setting in the second direction can increase the contact area between the fixing member 130 and the valve stent, thereby improving the assembly stability.

[0047] Further, the outer surface of the fixing member 130 on the side away from the support member 120 is an arc - shaped structure.

[0048] Specifically, by optimizing the structure of the fixing member 130, the smoothness of the outer surface of the fixing member 130 on the side away from the support member 120 is improved to reduce the friction force when the fixing member 130 passes through human tissues, and to reduce the damage to human tissues by the fixing member 130 during the movement of the delivery device 10 driving the fixing member 130 after the valve stent is released.

[0049] Further, in the cross - section of the fixing member 130 along the second direction, the mating groove 140 is arc - shaped.

[0050] Specifically, by optimizing the structure of the mating groove 140, the friction force of the direct connection between the valve and the fixing assembly 100 is reduced, and the possibility of damage to the valve stent is further reduced.

[0051] Further, a gap is formed between the support member 120 and the inner tube 220.

[0052] Specifically, a gap is formed between the support member 120 and the inner tube 220. When the material of the support member 120 is a soft material, while providing a certain support force, the soft material can further reduce the damage to the valve stent or the valve.

[0053] Further, the support member 120 is in the shape of a circular ring sheet or an arc - shaped sheet.

[0054] Specifically, the support member 120 being in the shape of a circular ring sheet means that the projection of the support member 120 in the circumferential direction is circular - ring - shaped; the support member 120 being in the shape of an arc - shaped sheet means that the projection of the support member 120 in the circumferential direction is arc - shaped. The support member 120 is not limited to the circular ring sheet or the arc - shaped sheet, and its shape is determined according to the structure of the valve stent it needs to support. As long as it ensures that the support member contacts the non - anchoring rod at the top of the valve stent frame to provide support force for the valve stent and prevent the valve stent from collapsing, this structure is particularly suitable for the loading and release of a valve stent with an incomplete symmetric structure at the top of the valve stent frame, such as a valve stent with a notch.

[0055] Preferably, two or more support members 120 may be provided in a fixing component 100 at the same time. Preferably, the support member 120 is in the shape of an arc sheet, and a plurality of support members 120 are evenly distributed in the circumferential direction. The uniform distribution is beneficial to the support of the valve stent and makes the supporting force evenly distributed. That is, when the number of support members 120 is two, the two support members 120 are oppositely arranged in the axial direction.

[0056] Furthermore, the fixing member 130 and the support member 120 are connected through a first arc surface.

[0057] Specifically, the fixing member 130 and the support member 120 are connected through a first arc surface (not shown in the figure), which increases the contact area between the fixing member 130 and the support member 120 and improves the connection stability.

[0058] Furthermore, the fixing head body 110, the support member 120 and the fixing member 130 are integrally formed.

[0059] Specifically, the fixing head body 110, the support member 120 and the fixing member 130 are integrally formed, which has a simple manufacturing process, improves the strength and firmness of the fixing component 100, and makes the structure of the fixing component 100 more compact.

[0060]

Embodiment 2

[0061] Refer to Figure 3 - Figure 4 , this embodiment also provides a delivery device 10, which includes an inner tube 220 and the fixing component 100 as described in the first embodiment above. The fixing component 100 is sleeved on the outer surface of the distal end of the inner tube 220.

[0062] Specifically, this embodiment can achieve the technical effects of the fixing component 100 corresponding to any one of the technical solutions in the first embodiment above, which will not be elaborated here. The delivery device 10 includes a catheter assembly 200 and a tapered head 300. The catheter assembly 200 includes an outer tube 210 and an inner tube 220. The inner tube 220 and the outer tube 210 are coaxially arranged. The fixing component 100 is located in the internal space formed by the outer tube 210 and the inner tube 220. The fixing component 100 is sleeved on the outer surface of the distal end of the inner tube 220. The catheter assembly 200 is sleeved on the outer surface of the fixing component 100. The tapered head 300 is connected to the distal end of the inner tube 220.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixing assembly (100), the fixing assembly (100) being used to fix a valve stent, characterized in that: The fixing assembly (100) comprises: A fixed head body (110), wherein an inner tube (220) is sleeved inside the fixed head body (110), and the fixed head body (110) and the inner tube (220) are connected; A support member (120), the support member (120) being connected to the fixing head body (110); A fixing member (130), wherein the fixing member (130) is protruded on the supporting member (120), and a matching groove (140) is provided on the fixing member (130), and the matching groove (140) matches with the matching protrusion on the valve support; Wherein, the valve support is fixed to the inner tube (220) by the fixing member (130).

2. The fixing assembly (100) according to claim 1, characterized in that: The fixing member (130) is cylindrical, and the axial direction of the fixing member (130) and the radial direction of the inner tube (220) are on the same straight line.

3. The fixing assembly (100) according to claim 2, characterized in that: The matching groove (140) is recessed along a first direction and is provided on the support member (120) through a second direction; The first direction is in the same direction as the axial direction of the fixing member (130), and the second direction is in the same direction as the radial direction of the fixing member (130).

4. The fixing assembly (100) according to any one of claims 1 to 3, characterized in that: The outer surface of the fixing member (130) on a side away from the supporting member (120) is an arc-shaped structure.

5. The fixing assembly (100) according to claim 3, characterized in that: In a cross section of the fixing member (130) along the second direction, the matching groove (140) is arc-shaped.

6. The fixing assembly (100) according to claim 1, characterized in that: A gap is formed between the support member (120) and the inner tube (220).

7. The fixing assembly (100) according to claim 1, characterized in that: The support member (120) is in the shape of a circular ring sheet or a circular arc sheet.

8. The fixing assembly (100) according to claim 1, characterized in that: The fixing member (130) and the supporting member (120) are connected via a first arc surface.

9. The fixing assembly (100) according to claim 1, characterized in that: The fixing head body (110), the supporting member (120) and the fixing member (130) are integrally formed.

10. A conveying device (10), characterized in that: The conveying device (10) comprises: Inner tube (220); The fixing assembly (100) according to any one of claims 1 to 9, wherein the fixing assembly (100) is sleeved on the outer surface of the distal end of the inner tube (220).

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