Conveying device for heart valve stent

Abstract

The utility model provides a heart valve support conveying device which comprises a core tube assembly, a sheath tube assembly and a handle assembly, the core tube assembly comprises a fixing head and a guiding head, and a mounting space of a heart valve support is formed between the fixing head and the guiding head; the sheath tube assembly is slidably arranged outside the core tube assembly in a sleeving mode and comprises a fixed lubricating piece, and the fixed lubricating piece is arranged on the inner wall of the sheath tube assembly; the handle assembly is connected with the core tube assembly and the sheath tube assembly, and the handle assembly is used for driving the core tube assembly to axially advance or retract relative to the sheath tube assembly, so that the heart valve stent is released or recycled. The fixed lubricating piece is arranged on the inner wall of the sheath tube of the conveying device, friction between the heart valve support and the inner wall of the sheath tube can be reduced, connection of the heart valve support can be reinforced, the heart valve support is prevented from falling off in advance, and operation risks are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a conveying device for a heart valve stent. Background Art

[0002] Heart valve disease is one of the most common heart diseases, among which rheumatic fever is the main cause of valve damage. In recent years, valve degeneration (including calcification and myxomatous degeneration) and metabolic valve damage have also increased. In addition, congenital valvular disease is also a common cause of heart disease. A considerable number of high-risk patients with heart valve disease, such as severe valvular regurgitation, elderly patients who are not suitable for surgical valve replacement, and patients with advanced tumors and valvular regurgitation, need new less invasive interventional treatments.

[0003] In the prior art, an artificial heart valve stent is compressed and then delivered into the human body through a delivery device. The compressed valve stent is usually elastic and exerts a large force on the compression catheter when in a compressed state. Such excessive force makes it difficult to release the valve stent slowly and accurately, often resulting in excessive friction between the valve stent and the inner wall of the blood vessel. In addition, the valve stent is unstable after being fixed and is prone to fall off before being released, resulting in certain surgical risks. Utility Model Content

[0004] In view of the above-mentioned problems existing in the prior art, the purpose of the utility model is to provide a delivery device for a heart valve stent, wherein a fixed lubricating part is provided on the inner wall of the sheath tube of the delivery device, which can reduce the friction between the heart valve stent and the inner wall of the sheath tube, and can strengthen the connection of the heart valve stent, prevent the heart valve stent from falling off prematurely, and reduce the risk of surgery.

[0005] The technical solution adopted by the utility model is: to provide a conveying device for a heart valve stent, comprising:

[0006] A core tube assembly, the core tube assembly comprising a fixed head and a guide head, wherein an installation space for a heart valve stent is formed between the fixed head and the guide head;

[0007] A sheath tube assembly, wherein the sheath tube assembly is slidably sleeved outside the core tube assembly, and the sheath tube assembly comprises a fixed lubricating member, wherein the fixed lubricating member is arranged on the inner wall of the sheath tube assembly;

[0008] A handle assembly is connected to the core tube assembly and the sheath tube assembly, and is used to drive the core tube assembly to move forward or backward axially relative to the sheath tube assembly, so that the heart valve stent is released or recovered.

[0009] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: a fixed lubricating part is provided on the inner wall of the sheath tube of the delivery device, which can reduce the friction between the heart valve stent and the inner wall of the sheath tube, and can strengthen the connection of the heart valve stent, prevent the heart valve stent from falling off prematurely, and reduce the risk of surgery.

[0010] In some embodiments, the sheath tube assembly includes an outer sheath tube, the outer sheath tube is arranged at the periphery of the installation space, and the fixed lubricating member is attached to the inner surface of the outer sheath tube.

[0011] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the outer sheath tube is arranged at the periphery of the installation space, and the outer sheath tube is used to accommodate the heart valve stent to provide axial support force for the heart valve stent.

[0012] In some embodiments, the core tube assembly includes a core tube, a first end of the core tube is connected to the handle assembly, a second end of the core tube passes through the outer sheath tube, and the second end of the core tube is connected to the guide head.

[0013] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the first end of the core tube is connected to the handle assembly, and the second end is connected to the guide head, so that the core tube can be driven by the handle assembly to move forward or backward axially relative to the sheath tube assembly, thereby driving the release and recovery of the heart valve stent.

[0014] In some embodiments, the fixed lubricating member includes a smooth portion, the smooth portion is fixedly connected to the inner surface of the outer sheath tube, and the smooth portion extends from the guide head to the fixed head.

[0015] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the smooth portion can reduce the friction between the outer sheath and the heart valve stent, and during the axial advancement or withdrawal of the core tube relative to the outer sheath, the direct force of the doctor's operation is reduced through the smooth portion, thereby improving the control of the release and recovery of the heart valve stent.

[0016] In some embodiments, the smooth portion is configured as a guide rail structure, and the heart valve stent includes an inflow portion and an outflow portion, one end of the outflow portion is connected to the fixed head, and the other end of the outflow portion is connected to the inflow portion, and one end of the inflow portion away from the outflow portion cooperates with the guide rail structure so that the heart valve stent is pressed into the installation space. The guide rail structure can prevent the heart valve stent from shifting during the release and recovery process.

[0017] Compared with the prior art, the technical effect achieved by adopting this technical solution is: the guide rail structure cooperates with the inflow part of the heart valve stent, so that the heart valve stent can be smoothly compressed into the installation space, reducing the friction with the inner wall of the outer sheath tube.

[0018] In some embodiments, the outer wall of the fixing head is provided with a connecting portion, the heart valve stent has a connecting ear, the connecting portion is adapted to the shape of the connecting ear, and the connecting ear is fixed in the connecting portion.

[0019] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the outer wall of the fixing head is provided with a connection position, and the fixing head is used to connect the heart valve stent, so that the heart valve stent can be fixed on the core tube assembly.

[0020] In some embodiments, the fixed lubricating member further includes a protrusion, and the protrusion is arranged at one end close to the fixed head.

[0021] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the fixed lubricating part is provided with a protrusion, and the protrusion is arranged at one end close to the fixed head, which can realize the function of the overlapping connecting ear.

[0022] In some embodiments, the protrusion abuts against the connecting portion, and when the heart valve stent is in a loaded state, the protrusion overlaps the connecting ear, so that the connecting ear is not easily detached from the connecting portion.

[0023] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the protrusion abuts against the connecting groove and overlaps the connecting ear, so that the heart valve stent is not easy to fall off from the fixing head during loading, thereby reducing the surgical risk.

[0024] In some embodiments, the protrusion is an elastic and bendable structure, and when the heart valve stent is in a released state, the protrusion can release the pressure on the connecting ear.

[0025] Compared with the prior art, the technical effect achieved by adopting this technical solution is that the protrusion is an elastic and bendable structure, and when releasing or fixing the heart valve stent, it will not hinder the heart valve stent from being fixed to the fixing head.

[0026] In some embodiments, the sheath tube assembly further comprises a delivery catheter, one end of which is connected to the handle assembly, and the other end of which is connected to the outer sheath tube.

[0027] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the arrangement of the delivery catheter provides axial support force for the core tube, so that the delivery catheter can meet the needs of different implantation points.

[0028] To sum up, the above-mentioned technical solutions of the present application may have one or more of the following advantages or beneficial effects: a fixed lubricating part is provided on the inner wall of the sheath tube of the delivery device of the utility model, which can reduce the friction between the heart valve stent and the inner wall of the sheath tube; a protrusion is provided on the fixed lubricating part, which can strengthen the connection of the heart valve stent and prevent the heart valve stent from falling off the fixed head, thereby reducing the risk of surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a conveying device according to an embodiment of the utility model;

[0030] Figure 2 It is a structural schematic diagram of the conveying device in the released state according to an embodiment of the utility model;

[0031] Figure 3 For the utility model embodiment Figure 1 Cross-sectional view of the conveying structure in the AA direction;

[0032] Figure 4 It is a partial enlarged view of the B area in the conveying device of the embodiment of the utility model.

[0033] Description of reference numerals:

[0034] 100, core tube assembly; 110, fixed head; 111, connecting part; 120, guide head; 130, core tube; 200, sheath tube assembly; 210, fixed lubricating part; 211, smooth part; 212, raised part; 220, outer sheath; 230, delivery catheter; 300, handle assembly. 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 will be described in detail below. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that the diagrams provided in the present embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, so the diagrams only show the components related to the present invention rather than the number, shape and size of the components in the actual implementation. The type, quantity and proportion of each component in the actual implementation can be changed at will, and the layout of the components may be more complicated. The structure, proportion, size, etc. shown in the diagrams attached to this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can be implemented, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect and purpose that the present invention can produce. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0037] Refer to the following Figures 1 to 4 The technical solutions of some embodiments of the utility model are described.

[0038] See attached Figure 1 and attached Figure 2 As shown, the technical solution adopted by the utility model is: to provide a delivery device for a heart valve stent, comprising:

[0039] The core tube assembly 100 includes a fixing head 110 and a guide head 120, wherein an installation space for a heart valve stent is formed between the fixing head 110 and the guide head 120;

[0040] The sheath tube assembly 200 is slidably sleeved outside the core tube assembly 100, and the sheath tube assembly 200 includes a fixed lubricating member 210, which is arranged on the inner wall of the sheath tube assembly 200;

[0041] The handle assembly 300 is connected to the core tube assembly 100 and the sheath tube assembly 200. The handle assembly 300 is used to drive the core tube assembly 100 to move forward or backward axially relative to the sheath tube assembly 200, so that the heart valve stent is released or recovered.

[0042] For the convenience of description, the end away from the handle assembly 300 is set as the distal end, and the end close to the handle is set as the proximal end.

[0043] Specifically, the fixing head 110 and the guide head 120 are both fixed on the core tube assembly 100, wherein the guide head 120 is located at the farthest end of the core tube assembly 100, and the distal side of the core tube assembly 100 is also sleeved with the fixing head 110, and the installation position of the heart valve stent is between the guide head 120 and the fixing head 110.

[0044] Specifically, the proximal end of the core tube assembly 100 is connected to the handle assembly 300, so that the handle assembly 300 can drive the core tube assembly 100 to move forward or retract axially relative to the sheath tube assembly 200; the distal end of the sheath tube assembly 200 is fixedly connected to the guide head 120, the proximal end of the sheath tube assembly 200 is fixedly connected to the handle assembly 300, and the sheath tube assembly 200 is sleeved outside the core tube assembly 100.

[0045] Specifically, a driving device is provided in the handle assembly 300. Optionally, the driving method includes but is not limited to hydraulic drive, electric drive, and mechanical drive.

[0046] Specifically, a fixed lubricating part 210 is provided on the inner wall of the sheath assembly 200, which can reduce the friction between the heart valve stent and the inner wall of the sheath, and can strengthen the connection of the heart valve stent, prevent the heart valve stent from falling off prematurely, and reduce the risk of surgery.

[0047] See attached Figure 1 and attached Figure 2 As shown, in some embodiments, the sheath assembly 200 includes an outer sheath 220 , which is disposed at the periphery of the installation space, and the fixed lubricating member 210 is attached to the inner surface of the outer sheath 220 .

[0048] Specifically, the outer sheath tube 220 is arranged at the periphery of the installation space. The outer sheath tube 220 is used to accommodate the heart valve stent. The outer sheath tube 220 has axial supporting force and radial supporting force, so that the heart valve stent is more easily compressed during the withdrawal process.

[0049] See attached Figure 2 and attached Figure 3 As shown, in some embodiments, the core tube assembly 100 includes a core tube 130 , a first end of the core tube 130 is connected to the handle assembly 300 , a second end of the core tube 130 passes through the outer sheath tube 220 , and a second end of the core tube 130 is connected to the guide head 120 .

[0050] Specifically, the proximal end of the core tube 130 is connected to the handle assembly 300, the distal end of the core tube 130 passes through the outer sheath tube 220, and the distal end of the core tube 130 is connected to the guide head 120, so that the core tube 130 can be driven by the handle assembly 300 to move forward or backward axially relative to the sheath tube assembly 200, and can drive the guide head 120 forward or backward, thereby driving the release and recovery of the heart valve stent.

[0051] See attached Figure 3 and attached Figure 4 As shown, in some embodiments, the fixed lubricating member 210 includes a smooth portion 211 , the smooth portion 211 is fixedly connected to the inner surface of the outer sheath tube 220 , and the smooth portion 211 extends from the guide head 120 to the fixed head 110 .

[0052] Specifically, the smooth portion 211 can reduce the friction between the outer sheath 220 and the heart valve stent. When the core tube 130 moves axially forward or backward relative to the outer sheath 220, the smooth portion 211 reduces the direct force of the doctor's operation, thereby improving the control of the release and recovery of the heart valve stent.

[0053] In some embodiments, the smooth portion 211 is configured as a guide rail structure, and the heart valve stent includes an inflow portion and an outflow portion, one end of the outflow portion is connected to the fixed head 110, and the other end of the outflow portion is connected to the inflow portion, and one end of the inflow portion away from the outflow portion cooperates with the guide rail structure so that the heart valve stent can be pressed into the installation space. The guide rail structure can prevent the heart valve stent from shifting during the release and recovery process.

[0054] Specifically, the guide rail structure cooperates with the inflow part of the heart valve stent. During the compression and release process, the inflow part of the heart valve stent moves along the guide rail structure, avoiding the displacement or kinking of the heart valve stent, which affects the surgical process, so that the heart valve stent can be smoothly compressed into the installation space, reducing the friction with the inner wall of the outer sheath tube 220.

[0055] See attached Figure 3 and attached Figure 4 As shown, in some embodiments, the outer wall of the fixing head 110 is provided with a connecting portion 111 , the heart valve stent has a connecting ear, the connecting portion 111 is adapted to the shape of the connecting ear, and the connecting ear is fixed in the connecting portion 111 .

[0056] Specifically, the connecting portion 111 can be configured as a groove, and the connecting ear of the heart valve stent can be embedded in the groove. The connecting portion 111 can also be configured as a hook structure, and the connecting ear can be hung on the hook structure, so that the heart valve stent can be fixed to the core tube assembly 100.

[0057] See attached Figure 3 and attached Figure 4 As shown, in some embodiments, the fixed lubricating member 210 further includes a protrusion 212 , and the protrusion 212 is disposed at one end close to the fixed head 110 .

[0058] Specifically, the fixed lubricating member 210 is provided with a protrusion 212 , and the protrusion 212 is provided at one end close to the fixed head 110 , and can realize the function of a stacking connection ear.

[0059] See attached Figure 3 and attached Figure 4 As shown, in some embodiments, the protrusion 212 abuts against the connecting portion 111 , and when the heart valve stent is in a loaded state, the protrusion 212 overlaps the connecting ear, so that the connecting ear is not easy to fall off from the connecting portion 111 .

[0060] Specifically, the protrusion 212 abuts against the connecting groove and overlaps on the connecting ear, applying a radially inward pressure to the connecting ear of the heart valve stent, thereby preventing the connecting ear of the heart valve stent from prematurely disengaging from the groove of the fixing head 110 during the release process, thereby causing the heart valve stent to be suddenly released, thereby reducing surgical risks.

[0061] In some embodiments, the protrusion 212 is an elastic and bendable structure, and when the heart valve stent is in a released state, the protrusion 212 can release the pressure on the connecting ear.

[0062] Specifically, the protrusion 212 is an elastic and bendable structure, and will not hinder the heart valve stent from being fixed to the fixing head 110 when the heart valve stent is released or fixed.

[0063] See attached Figure 1 and attached Figure 2 As shown, in some embodiments, the sheath assembly 200 further includes a delivery catheter 230 , one end of the delivery catheter 230 is connected to the handle assembly 300 , and the other end of the delivery catheter 230 is connected to the outer sheath 220 .

[0064] Specifically, the delivery catheter 230 is configured to provide an axial support force for the core tube 130 , and the delivery catheter 230 has a certain degree of flexibility, so that the delivery catheter 230 can meet the needs of different implantation points.

[0065] The working process of the delivery device of the utility model includes: driving the core tube 130 to move distally relative to the outer sheath tube 220 through the handle assembly 300 to expose the fixing head 110 of the core tube assembly 100, fixing one end of the heart valve stent on the fixing head 110, driving the core tube 130 to move proximally relative to the outer sheath tube 220 through the handle assembly 300, and compressing the heart valve stent loaded into the outer sheath tube 220; when the heart valve stent is delivered to the lesion position of the human body and after confirming that the release position of the heart valve stent is accurate, driving the core tube assembly 100 to move distally relative to the outer sheath tube 220 through the handle assembly 300, releasing the heart valve stent at the lesion position, and detaching the heart valve from the fixing head 110, thereby completing the release of the heart valve stent.

[0066] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. A delivery device for a heart valve stent, characterized in that: include: A core tube assembly (100), the core tube assembly (100) comprising a fixing head (110) and a guide head (120), wherein an installation space for a heart valve stent is formed between the fixing head (110) and the guide head (120); A sheath tube assembly (200), the sheath tube assembly (200) being slidably sleeved outside the core tube assembly (100), the sheath tube assembly (200) comprising a fixed lubricating component (210), the fixed lubricating component (210) being arranged on the inner wall of the sheath tube assembly (200); A handle assembly (300) is connected to the core tube assembly (100) and the sheath tube assembly (200), and the handle assembly (300) is used to drive the core tube assembly (100) to move forward or backward axially relative to the sheath tube assembly (200), so that the heart valve stent is released or recovered.

2. A delivery device for a heart valve stent according to claim 1, characterized in that: The sheath tube assembly (200) comprises an outer sheath tube (220), the outer sheath tube (220) being arranged at the periphery of the installation space, and the fixed lubricating component (210) being attached to the inner surface of the outer sheath tube (220).

3. A delivery device for a heart valve stent according to claim 2, characterized in that: The core tube assembly (100) comprises a core tube (130), a first end of the core tube (130) being connected to the handle assembly (300), a second end of the core tube (130) passing through the outer sheath tube (220), and a second end of the core tube (130) being connected to the guide head (120).

4. A delivery device for a heart valve stent according to claim 2, characterized in that: The fixed lubricating component (210) comprises a smooth portion (211), the smooth portion (211) being fixedly connected to the inner surface of the outer sheath tube (220), and the smooth portion (211) extending from the guide head (120) to the fixed head (110).

5. A delivery device for a heart valve stent according to claim 4, characterized in that: The smooth portion (211) is configured as a guide rail structure, and the heart valve stent comprises an inflow portion and an outflow portion, one end of the outflow portion is connected to the fixing head (110), and the other end of the outflow portion is connected to the inflow portion, and one end of the inflow portion away from the outflow portion cooperates with the guide rail structure so that the heart valve stent is pressed into the installation space.

6. A delivery device for a heart valve stent according to claim 1, characterized in that: The outer wall of the fixing head (110) is provided with a connecting portion (111), the heart valve stent has a connecting ear, the connecting portion (111) is adapted to the shape of the connecting ear, and the connecting ear is fixed in the connecting portion (111).

7. A delivery device for a heart valve stent according to claim 6, characterized in that: The fixed lubricating component (210) further comprises a protruding portion (212), wherein the protruding portion (212) is arranged at an end close to the fixed head (110).

8. A delivery device for a heart valve stent according to claim 7, characterized in that: The protruding portion (212) abuts against the connecting portion (111); when the heart valve stent is in a loaded state, the protruding portion (212) overlaps the connecting ear, so that the connecting ear is not likely to fall off from the connecting portion (111).

9. A delivery device for a heart valve stent according to claim 7, characterized in that: The protrusion (212) is an elastic and bendable structure, and when the heart valve stent is in a released state, the protrusion (212) can release the pressure on the connecting ear.

10. A delivery device for a heart valve stent according to claim 2, characterized in that: The sheath tube assembly (200) further comprises a delivery catheter (230), one end of which is connected to the handle assembly (300), and the other end of which is connected to the outer sheath tube (220).

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