A delivery device for a heart valve stent

Abstract

The utility model provides a delivery device for a heart valve stent, the delivery device comprising: a handle; an outer tube assembly, the outer tube assembly having a hollow inner cavity, the heart valve stent being arranged in the inner cavity, and the outer tube assembly moving axially relative to the handle; a locking member, the locking member being arranged on the handle; wherein the handle is provided with a first fixing portion and a second fixing portion, when the locking member cooperates with the first fixing portion, the locking member cooperates with the first groove of the outer tube assembly to limit the axial movement of the outer tube assembly relative to the handle; when the locking member cooperates with the second fixing portion, the locking member is separated from the first groove to allow the outer tube assembly to move axially relative to the handle. The problem solved by the utility model is how to provide a more convenient and intuitive locking structure for a delivery device.

Description

Technical Field

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

[0002] A heart valve stent is a medical device used to treat heart valve disease. It is mainly used to repair or replace damaged heart valves to restore the normal function of the heart. Heart valve stents are usually made of metal or polymer materials and have good biocompatibility and durability. The implantation process of a heart valve stent is usually carried out through a delivery device, which delivers the heart valve stent to the location of the damaged valve and then expands the heart stent to fit on the heart valve.

[0003] However, the existing heart valve stent delivery device still has some deficiencies in design and operation. For example, the locking structure of the delivery device is arranged inside the device, so that the user needs to perform complicated steps to lock or unlock the delivery outer tube during operation. This not only increases the difficulty of operating the delivery device, but may also affect the surgical effect due to improper operation. Therefore, it is necessary to provide a more convenient and intuitive locking and unlocking mechanism to improve the operability and safety of the heart valve stent delivery device. Utility Model Content

[0004] The problem solved by the utility model is how to provide a more convenient and intuitive locking structure for a conveying device.

[0005] In order to solve the above problems, the utility model provides a conveying device for a heart valve stent, the conveying device comprising: a handle; an outer tube assembly, the outer tube assembly has a hollow inner cavity, the heart valve stent is arranged in the inner cavity, and the outer tube assembly moves axially relative to the handle; a locking member, the locking member is arranged on the handle; wherein the handle is provided with a first fixing portion and a second fixing portion, when the locking member cooperates with the first fixing portion, the locking member cooperates with the first groove of the outer tube assembly to limit the axial movement of the outer tube assembly relative to the handle; when the locking member cooperates with the second fixing portion, the locking member is separated from the first groove to allow the outer tube assembly to move axially relative to the handle.

[0006] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the delivery device is used to accurately deliver the heart valve stent to the damaged valve position, and the heart valve stent is arranged in the inner cavity of the outer tube assembly. When in use, the doctor guides the delivery device to the position of the damaged valve, and at this time, the locking member cooperates with the first fixing part on the handle to limit the movement of the outer tube assembly, so as to ensure that the heart valve stent is in the inner cavity of the outer tube assembly. When the heart valve stent reaches the target position, the locking member on the operating handle is moved from the first fixing part to the second fixing part and cooperates with the second fixing part, so as to unlock the outer tube assembly. At this time, the outer tube assembly can move along the axial direction of the handle, so that the heart valve stent is exposed to the vascular environment, so as to complete the fixing of the heart valve stent at the heart valve position. A locking member is arranged at the handle, and the locking member is controlled to cooperate with the first fixing part and the second fixing part on the handle to realize the locking and unlocking of the outer tube assembly, thereby improving the operability and safety of the heart valve stent delivery device.

[0007] Furthermore, the locking member includes: a pin shaft, the pin shaft includes a guide rod and a locking part, one end of the guide rod is provided with a boss, the other end is connected to the locking part, and the boss is provided with a lug; a sleeve, the sleeve is fixedly connected to the handle; wherein the pin shaft passes through the sleeve, an elastic member is provided between the boss and the locking part, and the elastic member is sleeved on the guide rod.

[0008] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the sleeve is fixedly connected to the handle, and when the locking member cooperates with the first fixing portion, the elastic force of the elastic member in the locking member causes the pin shaft to move toward the handle, so that the locking portion enters the first groove, thereby completing the locking of the outer tube assembly by the locking member; when the outer tube assembly is to be unlocked, the locking portion is disengaged from the first groove by lifting the pin shaft, thereby completing the unlocking of the outer tube assembly.

[0009] Furthermore, the first fixing part includes: a first fixing position, the first fixing position is opened on the outer peripheral surface of the handle, the shape of the first fixing position is adapted to the boss, when the locking member cooperates with the first fixing part, the boss is arranged in the first fixing position, and the outer surface of the boss smoothly transitions with the outer peripheral surface of the handle.

[0010] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the first fixing portion is opened on the outer peripheral surface of the handle, and when the locking portion enters the first groove, the boss enters the first fixed position, and the outer surface of the boss smoothly transitions with the outer peripheral surface of the handle to ensure that the user will not accidentally touch the locking piece during operation.

[0011] Furthermore, the first fixing portion includes: a second fixing position, which is arranged on one side of the first fixing position. When the boss is arranged at the first fixing position, a hand-catching space is formed between the lug and the second fixing position.

[0012] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: when the locking member locks the outer tube assembly, a hand-grip space is formed between the lug and the second fixed position, so that when unlocking the locking member, the hand can be inserted into the hand-grip space to lift the pin shaft, thereby completing the unlocking of the locking member.

[0013] Furthermore, the second fixing part includes a first clamping block and a second clamping block, and the first clamping block and the second clamping block are arranged on the outer peripheral surface of the handle, and the first clamping block and the second clamping block are arranged in radial symmetry with the pin shaft; when the locking member cooperates with the second fixing part, the two sides of the lug respectively abut against the first clamping block and the second clamping block, and the lug abuts against the outer peripheral surface of the handle.

[0014] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: when the outer tube assembly is to be unlocked, the locking portion is disengaged from the first groove by lifting the pin shaft, and the pin shaft is rotated at this time to make the bottom of the lug abut against the outer peripheral surface of the handle to ensure that the locking portion of the locking member does not rebound into the first groove; the lug is rotated to the second fixing portion, and the lug is fixed by the first clamping block and the second clamping block to ensure that the locking member is not accidentally touched.

[0015] Furthermore, a second groove is provided on the outer tube assembly, and the second groove is provided on the outer peripheral surface of the outer tube assembly.

[0016] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the outer tube assembly moves along the axial direction of the handle to expose the heart valve stent to the vascular environment. At this time, the locking piece corresponds to the second groove. Through the cooperation between the locking piece and the second groove, the outer tube assembly can be locked or unlocked when the outer tube assembly is in a position that exposes the heart valve stent to the vascular environment.

[0017] Furthermore, the conveying device includes: a hydraulic device, which is connected to the outer tube assembly to drive the outer tube assembly to move axially relative to the handle.

[0018] Compared with the prior art, the technical effect achieved by adopting this technical solution is that the hydraulic device provides power for the axial movement of the outer tube assembly relative to the handle.

[0019] Furthermore, the delivery device includes: an inner tube, the inner tube is fixedly connected to the handle, and the inner tube is arranged in the inner cavity.

[0020] Compared with the prior art, the technical effect achieved by adopting this technical solution is that the inner tube is used to transport the heart valve stent to the location of the damaged valve.

[0021] Furthermore, the delivery device includes: a fixing piece, which is sleeved on the outer side wall of the inner tube and connected to the heart valve stent.

[0022] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: the fixing piece is sleeved on the inner tube, the heart valve stent is arranged on the fixing piece, and the outer tube assembly is on the periphery of the inner tube, the fixing piece and the heart valve stent to provide additional support and protection.

[0023] Furthermore, the conveying device includes: a conveying head, which is fixedly connected to one end of the inner tube.

[0024] Compared with the prior art, the technical effect achieved by adopting this technical solution is that the delivery head is arranged at one end of the delivery device entering the blood vessel so as to avoid scratching the blood vessel wall when entering the blood vessel.

[0025] After adopting the technical solution of the utility model, the following technical effects can be achieved:

[0026] (1) A locking member is provided at the handle, and the locking member is controlled to cooperate with the first fixing portion and the second fixing portion on the handle to achieve locking and unlocking of the outer tube assembly, thereby improving the operability and safety of the heart valve stent delivery device.

[0027] (2) The first fixing portion is provided on the outer peripheral surface of the handle. When the locking portion enters the first groove, the boss enters the first fixing position, and the outer surface of the boss smoothly transitions to the outer peripheral surface of the handle to ensure that the user does not accidentally touch the locking member during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a conveying device provided in Embodiment 1 of the present utility model;

[0029] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0030] Figure 3 It is an enlarged view of the A position when the locking member and the second fixing part of the conveying device provided in the first embodiment of the utility model cooperate with each other;

[0031] Figure 4 A cross-sectional view of a conveying device provided in Embodiment 1 of the present utility model;

[0032] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0033] Figure 6 A cross-sectional view of the locking member and the second fixing portion in the conveying device provided in the first embodiment of the utility model when they are matched;

[0034] Figure 7 This is a cross-sectional view of the outer tube assembly of the delivery device provided in Example 1 of the utility model when it is in the second position.

[0035] Description of reference numerals:

[0036] 100, handle; 110, first fixing part; 111, first fixing position; 112, second fixing position; 120, second fixing part; 121, first clamping block; 122, second clamping block; 200, outer tube assembly; 210, inner cavity; 220, first groove; 230, second groove; 300, inner tube; 310, fixing member; 400, locking member; 410, pin; 411, guide rod; 412, locking part; 413, boss; 414, lug; 420, sleeve; 500, hydraulic device; 600, delivery head. DETAILED DESCRIPTION

[0037] 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.

[0038] The utility model provides a conveying device for a heart valve stent, such as Figure 1 As shown, the delivery device includes: a handle 100; an outer tube assembly 200, the outer tube assembly 200 has a hollow inner cavity 210, the heart valve stent is arranged in the inner cavity 210, and the outer tube assembly 200 moves axially relative to the handle 100; a locking member 400, the locking member 400 is arranged on the handle 100; wherein the handle 100 is provided with a first fixing portion 110 and a second fixing portion 120, when the locking member 400 cooperates with the first fixing portion 110, the locking member 400 cooperates with the first groove 220 of the outer tube assembly 200 to limit the axial movement of the outer tube assembly 200 relative to the handle 100; when the locking member 400 cooperates with the second fixing portion 120, the locking member 400 is separated from the first groove 220 to allow the outer tube assembly 200 to move axially relative to the handle 100.

[0039] A heart valve stent is a medical device used to treat heart valve diseases. It is mainly used to repair or replace damaged heart valves to restore the normal function of the heart. The delivery device mainly includes: an outer tube assembly 200, an inner tube 300, and a handle 100. Among them, the inner tube 300 and the heart valve stent are arranged in the inner cavity 210 of the outer tube assembly 200, and are used to provide support and protection when the delivery device enters the blood vessel. The handle 100 is convenient for doctors to operate and control. When in use, the doctor first uses the delivery device to deliver the heart valve stent from the vascular system (usually the femoral vein or jugular vein) to the location of the damaged heart valve, so that the heart valve stent reaches the target position. After reaching the position, the doctor can release the stent by operating the handle 100, so that it can be unfolded and fit on the damaged valve to complete the surgical operation.

[0040] Specifically, the outer tube assembly 200 is sleeved on the periphery of the inner tube 300 and the heart valve stent, and is used to provide additional support and protection when the delivery device delivers the heart valve stent from the vascular system to the location of the damaged heart valve. When the heart valve stent reaches the target location, the outer tube assembly 200 moves backward relative to the handle 100 to expose the heart valve stent, and the heart valve stent is unfolded and attached to the damaged valve.

[0041] Preferably, Figure 2 and Figure 4 As shown, during the delivery process, the outer tube assembly 200 needs to be sleeved on the periphery of the inner tube 300 and the heart valve stent, and a locking member 400 is provided on the handle 100. When the locking member 400 cooperates with the first fixing portion 110 on the handle 100, the locking member 400 moves toward the handle 100, so that the locking member 400 enters the first groove 220 to limit the outer tube assembly 200 from moving axially relative to the handle 100; Figure 3 , Figure 6 and 7 As shown, when the heart valve stent reaches the target position, the locking member 400 is lifted and rotated to the second fixing portion 120 by hand, so that the locking member 400 is disengaged from the first groove 220 to release the outer tube assembly 200 from axial movement relative to the handle 100, and the outer tube assembly 200 can move backward relative to the handle 100.

[0042] Furthermore, the locking member 400 includes: a pin shaft 410, the pin shaft 410 includes a guide rod 411 and a locking portion 412, one end of the guide rod 411 is provided with a boss 413, and the other end is connected to the locking portion 412, and the boss 413 is provided with an ear 414; a sleeve 420, and the sleeve 420 is fixedly connected to the handle 100; wherein the pin shaft 410 passes through the sleeve 420, an elastic member is provided between the boss 413 and the locking portion 412, and the elastic member is sleeved on the guide rod 411.

[0043] Specifically, Figure 5 As shown, the elastic force of the elastic member in the locking member 400 causes the pin shaft 410 to move toward the handle 100, so that the locking portion 412 enters the first groove 220, thereby completing the locking of the outer tube assembly 200 by the locking member 400; when the outer tube assembly 200 is to be unlocked, the pin shaft 410 is lifted to disengage the locking portion 412 from the first groove 220, thereby completing the unlocking of the outer tube assembly 200.

[0044] Furthermore, the first fixing portion 110 includes: a first fixing position 111, the first fixing position 111 is opened on the outer peripheral surface of the handle 100, the shape of the first fixing position 111 is adapted to the boss 413, when the locking member 400 is matched with the first fixing portion 110, the boss 413 is arranged in the first fixing position 111, and the outer surface of the boss 413 smoothly transitions with the outer peripheral surface of the handle 100.

[0045] Specifically, the first fixing portion 110 is opened on the outer peripheral surface of the handle 100. When the locking portion 412 enters the first groove 220, the boss 413 enters the first fixing position 111, and the outer surface of the boss 413 smoothly transitions with the outer peripheral surface of the handle 100 to ensure that the user will not accidentally touch the locking member 400 during operation.

[0046] Furthermore, the first fixing portion 110 includes: a second fixing position 112, which is arranged at one side of the first fixing position 111. When the boss 413 is arranged at the first fixing position 111, a hand-engaging space is formed between the lug 414 and the second fixing position.

[0047] Specifically, Figure 5 As shown, when the locking member 400 locks the outer tube assembly 200, a hand-gripping space is formed between the lug 414 and the second fixing position 112, so that when the locking member 400 is unlocked, the hand can be inserted into the hand-gripping space to lift the pin 410, thereby completing the unlocking of the locking member 400.

[0048] Furthermore, the second fixing portion 120 includes a first clamping block 121 and a second clamping block 122, and the first clamping block 121 and the second clamping block 122 are arranged on the outer peripheral surface of the handle 100, and the first clamping block 121 and the second clamping block 122 are arranged in radial symmetry with the pin shaft 410; when the locking member 400 cooperates with the second fixing portion 120, the two sides of the lug 414 respectively abut against the first clamping block 121 and the second clamping block 122, and the lug 414 abuts against the outer peripheral surface of the handle 100.

[0049] Furthermore, the outer tube assembly 200 is provided with a second groove 230 , and the second groove 230 is provided on the outer circumferential surface of the outer tube assembly 200 .

[0050] Specifically, when the heart valve stent reaches the target position, the outer tube assembly 200 moves backward relative to the handle 100 to expose the heart valve stent. At this time, the locking portion 412 corresponds to the position of the second groove 230, and the locking member 400 can lock the outer tube assembly 200 to this position.

[0051] Furthermore, the conveying device includes: a hydraulic device 500 , which is connected to the outer tube assembly 200 to drive the outer tube assembly 200 to move axially relative to the handle 100 .

[0052] Preferably, the delivery device is connected to three saline pipes, which are respectively connected to the inner tube 300, the inner cavity 210 and the hydraulic device 500. The inner tube 300 has a hollow pipeline, and the saline pipe delivers saline through the pipeline, so that when the delivery device enters the vascular system, the saline is sprayed out through the front end of the inner tube 300 to clean the vascular environment; the inner cavity 210 is supplemented with saline through the saline pipe, so that the heart valve stent is immersed in saline during the delivery process, so that when the heart valve stent is exposed to the vascular environment, it will not generate a large pressure on the vascular environment; the saline pipe provides power for the hydraulic device 500.

[0053] Furthermore, the delivery device includes: an inner tube 300 , the inner tube 300 is fixedly connected to the handle 100 , and the inner tube 300 is disposed in the inner cavity 210 .

[0054] Furthermore, the delivery device includes: a fixing member 310, which is sleeved on the outer wall of the inner tube 300, and the fixing member 310 is connected to the heart valve stent.

[0055] Furthermore, the conveying device includes: a conveying head 600 , and the conveying head 600 is fixedly connected to one end of the inner tube 300 .

[0056] Specifically, a soft delivery head 600 is connected to the front end of the inner tube 300, and the diameter of the distal end thereof is smaller than the diameter of the proximal end so as to avoid scratching the blood vessel wall when entering the blood vessel.

[0057] 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 delivery device for a heart valve stent, characterized in that: The conveying device comprises: Handle(100); An outer tube assembly (200), the outer tube assembly (200) having a hollow inner cavity (210), the heart valve stent being arranged in the inner cavity (210), and the outer tube assembly (200) moving axially relative to the handle (100); A locking member (400), wherein the locking member (400) is disposed on the handle (100); The handle (100) is provided with a first fixing portion (110) and a second fixing portion (120); when the locking member (400) cooperates with the first fixing portion (110), the locking member (400) cooperates with the first groove (220) of the outer tube assembly (200) to limit the outer tube assembly (200) from moving relative to the handle (100) along the axial direction; When the locking member (400) is matched with the second fixing portion (120), the locking member (400) is separated from the first groove (220), so that the outer tube assembly (200) moves along the axial direction relative to the handle (100); The locking member (400) comprises: A pin shaft (410), the pin shaft (410) comprising a guide rod (411) and a locking portion (412), one end of the guide rod (411) being provided with a boss (413), the other end of the guide rod (411) being connected to the locking portion (412), the boss (413) being provided with a lug (414); A sleeve (420), wherein the sleeve (420) is fixedly connected to the handle (100); The pin shaft (410) passes through the sleeve (420), an elastic member is provided between the boss (413) and the locking portion (412), and the elastic member is sleeved on the guide rod (411); The first fixing portion (110) comprises: A first fixing position (111), the first fixing position (111) is provided on the outer peripheral surface of the handle (100), the shape of the first fixing position (111) is adapted to the boss (413), when the locking member (400) is matched with the first fixing portion (110), the boss (413) is arranged in the first fixing position (111), and the outer surface of the boss (413) smoothly transitions with the outer peripheral surface of the handle (100); The second fixing portion (120) comprises a first clamping block (121) and a second clamping block (122); the first clamping block (121) and the second clamping block (122) are arranged on the outer peripheral surface of the handle (100); the first clamping block (121) and the second clamping block (122) are arranged symmetrically in the radial direction of the pin shaft (410); When the locking member (400) cooperates with the second fixing portion (120), two sides of the lug (414) respectively abut against the first clamping block (121) and the second clamping block (122), and the lug (414) abuts against the outer peripheral surface of the handle (100).

2. The conveying device according to claim 1, characterized in that The first fixing portion (110) comprises: The second fixing position (112) is arranged at one side of the first fixing position (111), and when the boss (413) is arranged at the first fixing position (111), a hand-engaging space is formed between the lug (414) and the second fixing position.

3. The conveying device according to claim 1, characterized in that: The outer tube assembly (200) is provided with a second groove (230), and the second groove (230) is provided on the outer peripheral surface of the outer tube assembly (200).

4. The conveying device according to claim 1, characterized in that The conveying device comprises: A hydraulic device (500) is connected to the outer tube assembly (200) to drive the outer tube assembly (200) to move axially relative to the handle (100).

5. The conveying device according to claim 1, characterized in that: The conveying device comprises: An inner tube (300), wherein the inner tube (300) is fixedly connected to the handle (100), and the inner tube (300) is disposed in the inner cavity (210).

6. The conveying device according to claim 5, characterized in that The conveying device comprises: a fixing member (310), wherein the fixing member (310) is sleeved on the outer side wall of the inner tube (300), and the fixing member (310) is connected to the heart valve stent.

7. The conveying device according to claim 5, characterized in that The conveying device comprises: A delivery head (600), wherein the delivery head (600) is fixedly connected to one end of the inner tube (300).

Images