Heart valve prosthesis delivery device

Abstract

This application relates to the field of medical device technology, and provides a heart valve prosthesis delivery device, including: a handle, an outer tube connected to the handle, and an inner tube assembly extending within the outer tube and rotatable relative to the outer tube in a circumferential manner; the inner tube assembly includes a first inner tube and a second inner tube extending within the first inner tube, with a receiving space between the first inner tube and the second inner tube for accommodating the heart valve prosthesis. The technical solution of this application enables circumferential positioning of the heart valve prosthesis, improving the accuracy of the heart valve prosthesis implantation position.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a heart valve prosthesis delivery device. Background Technology

[0002] Currently, heart valve prostheses can be introduced into the patient's body via catheter, that is, the heart valve is placed through minimally invasive interventional surgery. The surgery does not require opening the chest, so it is less traumatic and the postoperative recovery is faster. It provides a new solution for patients with valvular stenosis whose lives cannot be prolonged or whose pain cannot be relieved by conventional treatments.

[0003] The process of implanting a heart valve prosthesis usually relies on a delivery device to transport the prosthesis to the predetermined site and release it. However, the existing delivery devices cannot meet the application requirements well, especially since the delivery devices cannot achieve circumferential rotation of the heart valve prosthesis, resulting in low accuracy in the release position of the heart valve prosthesis. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a heart valve prosthesis delivery device that can achieve circumferential positioning of the heart valve prosthesis and improve the accuracy of the heart valve prosthesis implantation position.

[0005] This application provides a heart valve prosthesis delivery device, including: a handle, an outer tube connected to the handle, and an inner tube assembly extending inside the outer tube and rotatable relative to the outer tube in a circumferential direction; the inner tube assembly includes a first inner tube and a second inner tube extending inside the first inner tube, and a receiving space for receiving a heart valve prosthesis is provided between the first inner tube and the second inner tube.

[0006] In one possible implementation, the proximal ends of both the first inner tube and the second inner tube are connected to the handle; the first inner tube includes an extension segment connected to the handle and extending distally within the outer tube, and a receiving segment protruding from the distal end of the outer tube to accommodate the heart valve prosthesis; the radial dimension of the receiving segment is greater than the radial dimension of the extension segment.

[0007] In one possible implementation, the handle includes a first housing and a second housing connected to the first housing, the second housing being circumferentially rotatable relative to the first housing, a fixing member being provided inside the first housing and connected to the proximal end of the outer sleeve; the handle also includes a transmission member, a chamber being provided inside the second housing, the transmission member being installed in the chamber, the proximal end of the first inner tube being connected to the transmission member, the proximal end of the second inner tube being connected to the second housing, and when the transmission member rotates with the second housing relative to the first housing, the first inner tube and the second inner tube rotate synchronously circumferentially relative to the outer sleeve.

[0008] In one possible implementation, the fastener includes a fixing post and a fixing part connected to the fixing post, the proximal end of the outer sleeve is fixedly connected to the fixing post, the first housing has an installation cavity, the fixing post is embedded in the installation cavity, the fixing part has at least one fixing hole, the first housing has at least one fixing mating hole corresponding to the fixing hole, and a fastener passes through the fixing hole and the fixing mating hole to fix the fastener to the first housing.

[0009] In one possible implementation, both the first inner tube and the second inner tube pass through the fixing member and are respectively connected to the proximal ends of the transmission member and the second housing.

[0010] In one possible implementation, a reinforcing tube is fitted onto the proximal end of the first inner tube, the reinforcing tube being fixedly connected to the first inner tube, and the proximal end of the reinforcing tube being fixedly connected to the transmission component.

[0011] In one possible implementation, the reinforcing tube is provided with a plurality of holes for applying adhesive.

[0012] In one possible implementation, the first housing is located at the distal end of the handle, the second housing is located at the proximal end of the handle, the chamber extends axially along the second housing, and the transmission element is adapted to move relative to the chamber along the axial direction of the second housing, thereby causing the first inner tube to move axially relative to the second inner tube.

[0013] In one possible implementation, a transmission rod is further provided inside the second housing. The distal end of the transmission rod is fixedly connected to the transmission component, and a sliding block is provided at the proximal end of the transmission rod. A sliding groove is also provided inside the second housing. The sliding block is embedded in the sliding groove and slides in cooperation with the sliding groove. A stop portion is provided at the proximal end of the sliding groove for stopping and limiting the sliding block.

[0014] In one possible implementation, the second housing is further provided with a drive assembly for driving the transmission rod to move axially relative to the handle.

[0015] In one possible implementation, the drive assembly includes a first drive member disposed on and threadedly connected to the transmission rod; the drive assembly further includes at least two second drive members arranged circumferentially along the transmission rod, the second drive members being drively connected to the first drive member, and the second drive members being used to drive the first drive member to rotate.

[0016] In one possible implementation, the proximal end of the first housing is provided with a insertion groove, and the distal end of the second housing is provided with a insertion post, the insertion post being inserted into the insertion groove; the end of the insertion post is provided with a locking member, and the proximal end of the first housing is also provided with a receiving groove for accommodating the locking member, the receiving groove being connected to the insertion groove, the receiving groove allowing the locking member to rotate.

[0017] In one possible implementation, the first housing is further provided with a locking engagement member, which cooperates with the locking member to lock or unlock the relative positions of the first housing and the second housing.

[0018] In one possible implementation, the locking member includes a locking gear located at the end of the insertion post, the locking gear forming a plurality of locking grooves; the locking engagement member includes a movable member and at least one locking post located on the movable member, wherein when the movable member is driven, the movable member moves axially along the first housing, such that the locking post is adapted to insert into or disengage from the locking groove.

[0019] In one possible implementation, the first housing is provided with a mounting notch; the movable component includes a drive block, a connecting block connected to the drive block, and a mounting block connected to the connecting block, the connecting block being slidably connected to the mounting notch, the drive block and the mounting block being located inside and outside the first housing respectively, and the mounting block being provided with the locking pin.

[0020] In one possible implementation, the insertion post has a channel, and the distal end of the reinforcing tube has a tapered head for passing through the channel; the channel is connected to the chamber, the first inner tube passes through the channel, and the proximal end of the first inner tube is connected to the transmission component in the chamber; the second inner tube extends within the first inner tube and passes through the channel to connect to the proximal end of the second housing.

[0021] The technical solution of this application has the following effects:

[0022] 1. The delivery device has a space for accommodating the heart valve prosthesis between the first inner tube and the second inner tube. At the same time, the first inner tube and the second inner tube can rotate synchronously circumferentially relative to the outer tube, thereby achieving the purpose of circumferential positioning of the heart valve prosthesis and improving the accuracy of heart valve prosthesis implantation.

[0023] 2. The outer tube is fitted around the periphery of the first inner tube, and the first inner tube and the outer tube work independently of each other, so that the first inner tube can rotate more easily relative to the outer tube in a circumferential manner to circumferentially position the heart valve prosthesis. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A partial structural schematic diagram of the conveying device provided in an embodiment of this application;

[0026] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0027] Figure 3 for Figure 2 Enlarged structural diagram of section A in the middle;

[0028] Figure 4 for Figure 2 Enlarged structural diagram of section B in the middle; Figure 5 This is a partial structural schematic diagram of the conveying device provided in an embodiment of this application from another perspective;

[0029] Figure 6 This is a schematic diagram of the structure of the first and second housings provided in the embodiments of this application;

[0030] Figure 7 This is a schematic diagram of a portion of the structure of the conveying device provided in the embodiments of this application;

[0031] Figure 8 A partially exploded structural diagram of the conveying device provided in an embodiment of this application;

[0032] Figure 9 A partially exploded structural diagram of the conveying device provided in an embodiment of this application from another perspective;

[0033] Figure 10 A partially exploded structural diagram of the conveying device provided in an embodiment of this application from another perspective;

[0034] Figure 11 This is a partial exploded structural diagram of the conveying device provided in the embodiments of this application from another perspective.

[0035] Icons: 1-Outer tube; 2-Second inner tube; 3-First inner tube; 31-Accommodating tube section; 32-Extension tube section; 4-Handle; 41-First housing; 411-Insertion groove; 412-Mounting notch; 413-First upper housing; 414-First lower housing; 415-Fixing hole; 416-Mounting cavity; 417-Accommodating groove; 418-Limiting groove; 42-Second housing; 421-Insertion post; 422-Channel; 423-Cavity; 424-Second upper housing; 425-Second lower housing; 426-Sliding groove; 43-Locking element; 431-Locking gear; 44 - Mounting slot; 441 - Annular boss; 45 - Positioning slot; 5 - Fixing component; 51 - Fixing post; 52 - Fixing part; 521 - Fixing hole; 6 - Locking mating part; 61 - Movable part; 611 - Driving block; 612 - Connecting block; 613 - Mounting block; 62 - Locking post; 7 - Transmission component; 8 - Reinforcing tube; 81 - Conical head; 9 - Guide head; 10 - Transmission rod; 101 - Sliding block; 11 - First driving component; 111 - First driving part; 112 - First support part; 12 - Second driving component; 121 - Second driving part; 122 - Second support part; 13 - End cap. Detailed Implementation

[0036] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0037] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, the term "distal" refers to the end of the delivery device closer to the heart tissue, and "proximal" refers to the end of the delivery device closer to the operator. The terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0038] like Figures 1 to 5 As shown, this application provides a heart valve prosthesis delivery device, including: a handle 4, an outer tube 1 connected to the handle 4, and an inner tube assembly extending inside the outer tube 1 and rotatable relative to the outer tube 1; the inner tube assembly includes a first inner tube 3 and a second inner tube 2 extending inside the first inner tube 3, and a receiving space for accommodating the heart valve prosthesis is provided between the first inner tube 3 and the second inner tube 2.

[0039] In the implementation of the above scheme, the delivery device includes a handle 4, an outer tube 1, a first inner tube 3, and a second inner tube 2. The first inner tube 3 and the second inner tube 2 constitute the inner tube assembly. The outer tube 1, the first inner tube 3, and the second inner tube 2 are all connected to the handle 4. The outer tube 1 is fitted around the outer periphery of the first inner tube 3, and the first inner tube 3 is fitted around the outer periphery of the second inner tube 2. The second inner tube 2 extends inside the first inner tube 3. Both the first inner tube 3 and the second inner tube 2 extend inside the outer tube 1 and can rotate synchronously relative to the outer tube 1. There is a space for accommodating the heart valve prosthesis between the first inner tube 3 and the second inner tube 2. When the first inner tube 3 and the second inner tube 2 rotate synchronously relative to the outer tube 1, the first inner tube 3 and the second inner tube 2 clamp the heart valve prosthesis and rotate synchronously relative to the outer tube 1 to achieve circumferential positioning of the heart valve prosthesis. After the heart valve prosthesis is circumferentially positioned, the heart valve prosthesis is released to improve the accuracy of the delivery device in implanting the heart valve prosthesis.

[0040] like Figures 2 to 4 As shown, in some embodiments, the proximal ends of the first inner tube 3 and the second inner tube 2 are both connected to the handle 4; the first inner tube 3 includes an extension tube segment 32 connected to the handle 4 and extending distally within the outer tube 1, and a receiving tube segment 31 protruding from the distal end of the outer tube 1 for accommodating the heart valve prosthesis; the radial dimension of the receiving tube segment 31 is greater than the radial dimension of the extension tube segment 32.

[0041] In the above implementation process, the proximal ends of the first inner tube 3 and the second inner tube 2 are both connected to the handle 4. The first inner tube 3 includes an extension tube section 32 and a receiving tube section 31. One end of the extension tube section 32 is connected to the handle 4, and the other end protrudes and extends to the distal end of the outer tube 1 and is connected to the receiving tube section 31. The receiving tube section 31 is located at the distal end of the outer tube 1, and the radial dimension of the receiving tube section 31 is larger than the radial dimension of the extension tube section 32, which is used to accommodate the heart valve prosthesis.

[0042] Specifically, the distal end of the second inner tube 2 is also fixedly connected to a guide head 9. The guide head 9 has a conical structure and a streamlined shape at its tip, which can avoid scratching the inner wall of the blood vessel and is also conducive to guiding the entire delivery device along the blood vessel. The tail of the guide head 9 has a planar structure and is used to press against the heart valve prosthesis.

[0043] like Figures 2 to 6As shown in Figures 8 and 9, in some embodiments, the handle 4 includes a first housing 41 and a second housing 42 connected to the first housing 41. The second housing 42 is rotatable relative to the first housing 41. A fixing member 5 is provided inside the first housing 41, and the fixing member 5 is connected to the proximal end of the outer sleeve 1. The handle 4 also includes a transmission member 7. A chamber 423 is provided inside the second housing 42. The transmission member 7 is installed in the chamber 423. The proximal end of the first inner tube 3 is connected to the transmission member 7, and the proximal end of the second inner tube 2 is connected to the second housing 42. When the transmission member 7 rotates with the second housing 42 relative to the first housing 41, the first inner tube 3 and the second inner tube 2 rotate synchronously circumferentially relative to the outer sleeve 1.

[0044] In the above-mentioned implementation process, the handle 4 includes a first housing 41 and a second housing 42 connected to the first housing 41. The second housing 42 can rotate circumferentially relative to the first housing 41. When the heart valve prosthesis needs to be circumferentially positioned, the second housing 42 rotates relative to the first housing 41. When the heart valve prosthesis is released or retrieved, the second housing 42 remains stationary relative to the first housing 41. The first housing 41 is provided with a fixing member 5, and the proximal end of the outer tube 1 is fixedly connected to the fixing member 5, thereby improving the stability of the outer tube 1. Meanwhile, the outer sleeve 1 is fitted around the outer periphery of the first inner tube 3. When both the first inner tube 3 and the outer sleeve 1 are inside the human body, the outer sleeve 1 provides stable support for the first inner tube 3. The handle 4 also contains a transmission component 7. The proximal end of the first inner tube 3 is connected to the transmission component 7, and the second inner tube 2 is fixedly connected to the proximal end of the second housing 42. The second housing 42 contains a chamber 423, which extends along the axial direction of the second housing 42. The transmission component 7 is installed within the chamber 423. When the second housing 42 rotates relative to the first inner tube 3, the transmission component 7 rotates synchronously with the second housing 42 relative to the first housing 41. Simultaneously, because the proximal end of the first inner tube 3 is fixedly connected to the transmission component 7, the outer sleeve 1 and the fixing component 5... With a fixed connection, when the transmission component 7 rotates relative to the first housing 41, the first inner tube 3 also rotates relative to the first housing 41 and circumferentially relative to the outer outer tube 1. In addition, the proximal end of the second inner tube 2 is fixedly connected to the proximal end of the second housing 42. Therefore, when the second inner tube 2 rotates relative to the first inner tube 3, the second inner tube 2 also rotates relative to the first housing 41 and circumferentially relative to the outer outer tube 1. This ultimately achieves that when the second housing 42 rotates relative to the first housing 41, the first inner tube 3 and the second inner tube 2 rotate synchronously circumferentially relative to the outer outer tube 1. When the rotation reaches the position where the heart valve prosthesis needs to be implanted, the heart valve prosthesis is released, thereby improving the accuracy of the heart valve prosthesis implantation position.

[0045] like Figure 8 and 9As shown, specifically, the first housing 41 is formed by the interlocking of the first upper housing 413 and the first lower housing 414, and the second housing 42 is formed by the interlocking of the second upper housing 424 and the second lower housing 425. The proximal end of the second inner tube 2 is fixedly connected to the proximal end of the second housing 42 by means of adhesive or other methods. Both the second upper housing 424 and the second lower housing 425 are provided with recesses, and the two recesses are positioned correspondingly. When the second upper housing 424 and the second lower housing 425 are interlocked, the two recesses form a cavity 423, and the transmission component 7 is embedded in the cavity 423, so that when the second housing 42 rotates relative to the first housing 41, the transmission component 7 rotates synchronously with the second housing 42 relative to the first housing 41.

[0046] The first housing 41 is designed to be formed by fastening together the first upper housing 413 and the first lower housing 414, which facilitates the assembly of other components inside the first housing 41; similarly, the second housing 42 is designed to be formed by fastening together the second upper housing 424 and the second lower housing 425, which also facilitates the assembly of other components inside the second housing 42.

[0047] like Figure 7 As shown, in some embodiments, the fastener 5 includes a fixing post 51 and a fixing part 52 connected to the fixing post 51. The proximal end of the outer sleeve 1 is fixedly connected to the fixing post 51. The first housing 41 is provided with an installation cavity 416. The fixing post 51 is embedded in the installation cavity 416. The fixing part 52 is provided with at least one fixing hole 521. The first housing 41 is provided with at least one fixing mating hole 415 corresponding to the fixing hole 521. The fastener passes through the fixing hole 521 and the fixing mating hole 415 to fix the fastener 5 to the first housing 41.

[0048] In the above-mentioned implementation process, the first housing 41 is provided with an installation cavity 416. The fastener 5 includes a fixing post 51 and a fixing part 52 connected to the fixing post 51. The fixing post 51 is embedded in the installation cavity 416, thereby achieving the initial fixation of the fastener 5 and the first housing 41. The fixing part 52 is provided with at least one fixing hole 521. The first housing 41 is provided with at least one fixing mating hole 415 corresponding to the fixing hole 521. The fastener passes through the fixing mating hole 415 and the fixing hole 521, thereby fixing the fastener 5 and the first housing 41. At the same time, the proximal end of the outer sleeve 1 is threadedly connected to the fixing post 51, thereby achieving the fixed connection between the outer sleeve 1 and the fixing post 51.

[0049] Specifically, the fixing post 51 is a column structure, and the fixing part 52 is also a column structure. The diameter of the fixing part 52 is larger than that of the fixing post 51, which can shorten the distance between the fixing part 52 and the first housing 41, making it easier for the fasteners to fix the fixing member 5 to the first housing 41. The fixing part 52 has two fixing holes 521 opposite to each other. The first upper housing 413 has a fixing mating hole 415 corresponding to one of the fixing holes 521, and the first lower housing 414 has a fixing mating hole 415 corresponding to the other fixing hole 521. The fixing member 5 and the first housing 41 are then fixedly connected from two directions by two fasteners.

[0050] like Figure 4 As shown, in some embodiments, the first inner tube 3 and the second inner tube 2 both pass through the fixing member 5 and are respectively connected to the transmission member 7 and the proximal end of the second housing 42.

[0051] In the above-mentioned implementation process, the fixing member 5 is provided with a hollow channel in the axial direction. The first inner tube 3 and the second inner tube 2 both pass through the hollow channel and are respectively connected to the transmission member 7 and the proximal end of the second housing 42. When the second housing 42 rotates circumferentially relative to the first housing 41, the first inner tube 3 and the second inner tube 2 can rotate circumferentially relative to the first housing 41 synchronously, which further realizes the circumferential positioning of the heart valve prosthesis by the delivery device.

[0052] like Figure 7 As shown, in some embodiments, a reinforcing tube 8 is sleeved on the proximal end of the first inner tube 3, the reinforcing tube 8 is fixedly connected to the first inner tube 3, and the proximal end of the reinforcing tube 8 is fixedly connected to the transmission component 7.

[0053] In the process of implementing the above scheme, a reinforcing tube 8 is sleeved on the proximal end of the first inner tube 3. The reinforcing tube 8 is fixedly connected to the first inner tube 3. The first inner tube 3 is a flexible tube. By sleeved with the reinforcing tube 8 on the outer periphery of the first inner tube 3, a stable support can be provided for the first inner tube 3.

[0054] In some embodiments, the reinforcing tube 8 is provided with a plurality of holes for applying adhesive.

[0055] In the process of implementing the above solution, multiple holes are provided on the reinforcing tube 8 to facilitate the application of adhesive, so as to achieve a fixed connection between the reinforcing tube 8 and the first inner tube 3.

[0056] like Figure 9 As shown, in some embodiments, the first housing 41 is located at the distal end of the handle 4, the second housing 42 is located at the proximal end of the handle 4, the chamber 423 extends axially along the second housing 42, and the transmission member 7 is adapted to move relative to the chamber 423 along the axial direction of the second housing 42, thereby driving the first inner tube 3 to move axially relative to the second inner tube 2.

[0057] In the above implementation process, the first housing 41 is located at the far end of the handle 4, the second housing 42 is located at the near end of the handle 4, and the chamber 423 extends along the axial direction of the second housing 42. When the transmission member 7 is adapted to move axially along the chamber 423, the transmission member 7 drives the first inner tube 3 to move synchronously. In addition, since the second inner tube 2 is fixedly connected to the near end of the second housing 42, when the transmission member 7 drives the first inner tube 3 to move synchronously, the first inner tube 3 moves axially relative to the second inner tube 2. Here, "adapted" means that the transmission member 7 only moves axially when it needs to move axially along the chamber 423.

[0058] Specifically, the transmission component 7 is a block structure, including two opposing arc surfaces. The two recessed parts of the second upper housing 424 and the second lower housing 425 are respectively adapted to the two arc surfaces, thereby reducing the resistance generated when the transmission component 7 moves axially along the chamber 423, making it easier for the transmission component 7 to move axially along the chamber 423. When the transmission component 7 moves axially along the chamber 423, it simultaneously drives the first inner tube 3 to move axially, while the second inner tube 2 remains stationary. Therefore, when the first inner tube 3 moves axially relative to the second inner tube 2, the heart valve prosthesis located in the accommodating tube segment 31 is released.

[0059] like Figure 2 , 8 As shown in Figure 9, in some embodiments, a transmission rod 10 is also provided inside the second housing 42. The distal end of the transmission rod 10 is fixedly connected to the transmission member 7, and a sliding block 101 is provided at the proximal end of the transmission rod 10. A sliding groove 426 is also provided inside the second housing 42. The sliding block 101 is embedded in the sliding groove 426 and slides in cooperation with the sliding groove 426. A stop portion is provided at the proximal end of the sliding groove 426 for limiting the movement of the sliding block 101.

[0060] In the implementation of the above scheme, a transmission rod 10 is provided inside the second housing 42. The transmission rod 10 is coaxially arranged with the transmission component 7. The distal end of the transmission rod 10 is threadedly connected to the transmission component 7, and the proximal end of the transmission rod 10 is provided with a sliding block 101. A sliding groove 426 is also provided inside the second housing 42. The sliding groove 426 extends along the axial direction of the second housing 42 and is located beside the chamber 423 and spaced apart from the chamber 423. The sliding block 101 is embedded in the sliding groove 426 to provide stable support for the transmission rod 10. Meanwhile, the sliding block 101 can slide within the sliding groove 426. When the transmission rod 10 is driven, the transmission rod 10 moves axially along the chamber 423, which in turn drives the transmission component 7 to move axially along the chamber 423. In addition, a stop is provided at the proximal end of the sliding groove 426. When the sliding block 101 moves axially from the far end of the sliding groove 426 toward the proximal end of the sliding groove 426, the stop can stop the sliding block 101, restrict the movement of the sliding block 101, and prevent the sliding block 101 from falling out of the sliding groove 426.

[0061] Specifically, both the transmission component 7 and the transmission rod 10 are hollow structures. The second inner tube 2 extends within the first inner tube 3 and passes through the first inner tube 3, the transmission component 7, and the transmission rod 10 to be fixedly connected to the proximal end of the second housing 42.

[0062] In some embodiments, the second housing 42 is further provided with a drive assembly for driving the transmission rod 10 to move axially relative to the handle 4.

[0063] In the process of implementing the above solution, the second housing 42 is also provided with a drive assembly. When the drive assembly drives the transmission rod 10, the transmission rod 10 drives the transmission component 7 to move axially along the cavity 423 relative to the second housing 42, that is, to move axially relative to the handle 4, thereby realizing the synchronous movement of the transmission component 7 and the transmission rod 10.

[0064] like Figures 7 to 9 As shown, in some embodiments, the drive assembly includes a first drive member 11, which is disposed on the transmission rod 10 and threadedly connected to the transmission rod 10; the drive assembly also includes at least two second drive members 12, which are arranged circumferentially along the transmission rod 7, and the second drive members 12 are drively connected to the first drive member 11, and the second drive members 12 are used to drive the first drive member 11 to rotate.

[0065] In the implementation of the above scheme, the drive assembly includes a first drive member 11, which is sleeved on the outer periphery of the transmission rod 10 and connected to the transmission rod 10 by threads. The drive assembly also includes at least two second drive members 12, both of which are located on the second housing 42 and are evenly distributed in the circumferential direction of the second housing 42. This allows medical personnel to operate the second drive members 12 from different angles, thereby causing the first inner tube 3 to move axially relative to the second inner tube 2, improving the convenience of operation for medical personnel and also increasing the success rate of surgery. One end of the second drive member 12 is provided with multiple teeth, and one end of the first drive member 11 is provided with tooth grooves corresponding to the multiple teeth. The teeth on the second drive member 12 mesh with the tooth grooves on the first drive member 11, thereby realizing the transmission connection between the first drive member 11 and the second drive member 12. When the second driving member 12 rotates, the first driving member 11 rotates synchronously with the second driving member 12. Since the transmission rod 10 is threadedly connected to the first driving member 11, and the sliding block 101 is embedded in the sliding groove 426, the transmission rod 10 moves axially along the chamber 423. At the same time, the sliding block 101 also moves axially along the sliding groove 426.

[0066] Specifically, the second housing 42 is provided with three second driving members 12. Each of the three second driving members 12 has multiple teeth at one end, and all three second driving members 12 mesh with the first driving member 11. The axes of two adjacent second driving members 12 are at 120°. The purpose of this arrangement is that when medical staff hold the delivery device, the angle of circumferential rotation of the second housing 42 relative to the first housing 41 is unknown. By providing three second driving members 12 on the second housing 42, medical staff can easily operate any one of the second driving members 12 to drive the first inner tube 3 to move axially relative to the second inner tube 2, thereby releasing the heart valve prosthesis and improving the convenience of medical staff operating the delivery device.

[0067] Optionally, each of the three second driving members 12 has multiple teeth at its end. At the same time, the axes of the three second driving members 12 are perpendicular to the axis of the first driving member 11, thereby ensuring the meshing angle between the first driving member 11 and the second driving member 12. This allows the second driving member 12 to drive the first driving member 11 to rotate relative to the transmission rod 10 more smoothly when rotating around its own axis.

[0068] Optionally, each of the second driving components 12 can drive the transmission rod 10 to move axially relative to the handle 4. The second inner tube 2 is connected to the handle 4 by means of adhesive or other means. The transmission rod 10 is connected to the first inner tube 3. When the transmission rod 10 moves axially relative to the handle 4, it simultaneously drives the first inner tube 3 to move axially relative to the handle 4, so that the first inner tube 3 moves axially relative to the second inner tube 2, thereby realizing the release or retraction of the heart valve prosthesis.

[0069] like Figure 10 and 11 As shown, the first driving member 11 includes a first driving part 111 and a first support part 112 sleeved on the outer periphery of the first driving part 111. The first support part 112 is tightly connected to the first driving part 111, so that the first support part 112 has a clamping force on the first driving part 111, ensuring the stability of the structure. The distal end of the first driving part 111 is provided with multiple toothed grooves. The second driving member includes a second driving part 121 and a second support part 122 sleeved on the outer periphery of the second driving part 121. The second support part 122 is tightly connected to the second driving part 121. The second driving part 121 faces the transmission rod. One end of the transmission rod 10 is provided with multiple teeth. The first driving part 111 meshes with the second driving part 121. The first driving part 111 is sleeved on the outer periphery of the transmission rod 10 and is threadedly connected to the transmission rod 10. The second driving part 121 is adapted to drive the first driving part 111 to rotate so that the first driving part 111 is driven relative to the transmission rod 10, and at the same time, the transmission rod 10 is moved axially relative to the handle 1. "Adapted" means that when the transmission rod 10 needs to move axially relative to the handle 1, the second driving part 121 drives the first driving part 111 to rotate so that the transmission rod 10 moves axially relative to the handle 1.

[0070] The conveying device also includes a power rod. The second drive unit 121 is provided with a slot. The slot is formed by the second drive unit 121 being recessed from one end away from the multiple teeth and towards the other end of the multiple teeth. One end of the power rod is adapted to the slot. The power rod includes an insertion end that can be inserted into the slot. When the power rod is inserted into the slot, it can drive the second drive unit 121 to rotate, so that the second drive unit 121 synchronously drives the first drive unit 111 to rotate. When one end of the power rod is separated from the slot, the second drive unit stops rotating.

[0071] like Figure 10 As shown, optionally, the second housing 42 is provided with a mounting groove 44 corresponding to the second driving member 12. The mounting groove 44 is used to accommodate the second driving member 12 so that the second driving member 12 can rotate within the mounting groove 44. The peripheral wall of the mounting groove 44 provides stable support for the second driving member 12.

[0072] like Figure 10 As shown, the mounting groove 44 is also provided with an annular boss 441. The second support part 122 is located in the mounting groove 44 and abuts against the annular boss 441. The second drive part 121 is tightly connected to the second support part 122. When the second drive part 121 is driven to rotate at the insertion end of the power rod, the second support part 122 and the second drive part 121 rotate synchronously.

[0073] Optionally, the number of mounting slots 44 corresponds to the number of second drive members 12. Multiple mounting slots 44 are evenly distributed along the circumference of the second housing 42, so that medical staff can drive the second drive member 12 to rotate from multiple angles, so that the first inner tube 3 moves axially relative to the second housing 42, thereby improving the convenience of operation for medical staff.

[0074] Optionally, the second support portion 122 is a ball bearing, including an inner ring and an outer ring. The inner and outer rings are connected by multiple balls. The diameter of the inner ring is equal to the radial dimension of the end of the second drive portion 121 opposite to the multiple teeth, allowing the second support portion 122 to be fitted onto the outer circumference of the second drive portion 121 for a tight fit. The outer ring abuts against the annular boss 441 and is embedded in the mounting groove 44, ensuring the stability of the second support portion 122. When the second drive portion 121 rotates, the inner ring of the second support portion 122 rotates synchronously with the second drive portion 121, while the outer ring of the second support portion 122 remains relatively stationary. The second support portion 122 provides support for the second drive portion 121 and ensures the stability of the second drive portion 121 during rotation.

[0075] like Figure 11As shown, optionally, the second housing 42 is also provided with a positioning groove 45, the first support part 112 is embedded in the positioning groove 45, the chamber 423 is connected to the positioning groove 45, the first drive part 111 is tightly connected to the first support part 112, when the second drive part 121 drives the first drive part 111 to rotate, the first support part 112 provides stable support for the first drive part 111 to ensure that the first drive part 111 and the second drive part 121 rotate synchronously.

[0076] Optionally, the first support portion 112 and the second support portion 122 have the same structure, both being ball bearings, including an inner ring and an outer ring. The outer ring of the first support portion 112 fits against the groove wall of the positioning groove 45, while the inner ring is tightly connected to the first drive portion 111. When the first drive portion 111 rotates, the inner ring of the first support portion 112 rotates synchronously with the first drive portion 111, while the outer ring of the first support portion 112 remains relatively stationary. The first support portion 112 provides support for the first drive portion 111 on the one hand, and ensures the stability of the first drive portion 111 during rotation on the other hand.

[0077] Optionally, both the second upper housing 424 and the second lower housing 425 are provided with positioning grooves 45. The positions of the two positioning grooves 45 are corresponding. When the second upper housing 424 and the second lower housing 425 are fastened together, the first support part 112 is accommodated in the positioning groove 45.

[0078] like Figure 11 As shown, an end cap 13 is also provided at the opening of the mounting groove 44. The end cap 13 is detachably connected to the groove periphery of the mounting groove 44 to protect the second driving member 12. At the same time, the end cap 13 limits the second support part 122 to prevent the second support part 122 from falling out of the mounting groove 44.

[0079] Optionally, the end cap 13 also has a through hole at its center corresponding to the slot, so that the insertion end of the power rod can be inserted into the slot.

[0080] The end cap 13 is fastened to the groove wall of the mounting groove 44 by multiple bolts, or by snap-fitting or other methods.

[0081] like Figure 8 and 9 As shown, in some embodiments, the proximal end of the first housing 41 is provided with a plug groove 411, and the distal end of the second housing 42 is provided with a plug post 421, which is plugged into the plug groove 411; the end of the plug post 421 is provided with a locking member 43, and the proximal end of the first housing 41 is also provided with a receiving groove 417 for accommodating the locking member 43, which is connected to the plug groove 411 and can accommodate the locking member 43 to rotate.

[0082] In the above-mentioned implementation process, the proximal end of the first housing 41 is provided with a plug groove 411, and the distal end of the second housing 42 is provided with a plug post 421. The plug post 421 is inserted into the plug groove 411, thereby enabling the second housing 42 to rotate relative to the first housing 41. The end of the plug post 421 is provided with a locking member 43, and the proximal end of the first housing 41 is also provided with a receiving groove 417. The receiving groove 417 is connected to the plug groove 411 and is used to receive the locking member 43. When the second housing 42 rotates relative to the first housing 41, the locking member 43 rotates synchronously with the second housing 42 relative to the first housing 41, and the locking member 43 rotates within the receiving groove 417.

[0083] Specifically, the radial dimension of the receiving groove 417 is larger than the radial dimension of the insertion groove 411, so that when the insertion post 421 is inserted into the insertion groove 411, one side of the locking member 43 abuts against one side of the receiving groove 417, which can prevent the second housing 42 from falling out of the insertion groove 411 of the first housing 41.

[0084] like Figures 7 to 9 As shown, in some embodiments, the first housing 41 is further provided with a locking engagement 6, which cooperates with the locking engagement 43 to lock or unlock the relative positions of the first housing 41 and the second housing 42.

[0085] In the process of implementing the above solution, a locking engagement 6 is also provided inside the first housing 41. The locking engagement 6 cooperates with the locking engagement 43 to achieve the relative position between the first housing 41 and the second housing 42 by unlocking or locking.

[0086] Specifically, the first housing 41 is also provided with a limiting groove 418, which extends along the axial direction of the first housing 41. One side of the limiting groove 418 is separated from the mounting cavity 416 by a partition, and the other side is connected to the receiving groove 417. A part of the locking fitting 6 is located in the limiting groove 418 and can move axially relative to the limiting groove 418, thereby locking or unlocking the locking member 43. Furthermore, when the second housing 42 rotates relative to the first housing 41 to a suitable release circumferential angle of the heart valve prosthesis, the locking fitting 6 locks the locking member 43 to prevent the second housing 42 from continuing to rotate, thereby achieving the purpose of precise implantation of the heart valve prosthesis.

[0087] like Figure 2 and 6 As shown, in some embodiments, the locking member 43 includes a locking gear 431 disposed at the end of the insertion post 421, the locking gear 431 forming a plurality of locking grooves; the locking mating member 6 includes a movable member 61 and at least one locking post 62 disposed on the movable member 61, when the movable member 61 is driven, the movable member 61 moves axially along the first housing 41, such that the locking post 62 is adapted to be inserted into or disengaged from the locking groove.

[0088] In the above-described implementation process, the locking member 43 includes a locking gear 431 located at the end of the insertion post 421. The locking gear 431 has multiple locking grooves. The locking member 43 mating part includes a movable member 61 and at least one locking post 62 connected to the movable member 61. The locking post 62 extends along the axial direction of the limiting groove 418. When the movable member 61 moves toward the locking gear 431 along the axial direction of the first housing 41, the locking post 62 is inserted into the locking groove, locking the relative position of the first housing 41 and the second housing 42. When the movable member 61 moves away from the locking gear 431 along the axial direction of the first housing 41, the locking post 62 disengages from the locking groove, and the second housing 42 can rotate circumferentially relative to the first housing 41.

[0089] Specifically, two locking pins 62 are provided. The two locking pins 62 are located on one side of the movable member 61 and extend protruding towards the locking pin 62. The two locking pins 62 are symmetrically arranged about the axis of the movable member 61. By providing two locking pins 62, the locking effect between the locking member 43 and the locking mating member 6 is improved, preventing the second housing 42 from shaking when the locking member 43 and the locking mating member 6 are locked together.

[0090] Specifically, the locking gear 431 has multiple teeth, and the gap between two adjacent teeth forms a locking groove. The teeth have a truncated pyramidal structure, and the width of the locking pin 62 is sufficient to meet the gap between two adjacent teeth. This ensures that when the locking pin 62 is inserted into the locking groove, both sides of the locking pin 62 are fitted with two adjacent teeth, improving the locking effect. In addition, since the teeth have a truncated pyramidal structure, the top surface of each tooth is connected to the insertion pin 421. The gap between two adjacent teeth gradually decreases outward from the radial direction of the insertion pin 421. This ensures that when the locking pin 62 is inserted into the locking groove, the two adjacent teeth will clamp the locking pin 62, resulting in a better locking effect.

[0091] like Figure 2 and 9 As shown, in some embodiments, the first housing 41 is provided with a mounting notch 412; the movable member 61 includes a driving block 611, a connecting block 612 connected to the driving block 611, and a mounting block 613 connected to the connecting block 612. The connecting block 612 is slidably connected to the mounting notch 412. The driving block 611 and the mounting block 613 are located inside and outside the first housing 41, respectively, and a locking pin 62 is provided on the mounting block 613.

[0092] In the above-mentioned implementation process, the first housing 41 is provided with an installation notch 412, which is connected to the limiting groove 418; the movable part 61 includes a driving block 611, a connecting block 612 and an installation block 613, the connecting block 612 is connected to the driving block 611 and the installation block 613 respectively, and the installation block 613 is fixedly connected to the plug-in post 421, thereby forming a locking engagement part 6; the driving block 611 is located outside the first housing 41, the installation block 613 is located inside the first housing 41, and the connecting block 612 is slidably connected to the installation notch 412, thereby realizing that the movable part 61 can move axially along the installation notch 412.

[0093] In some embodiments, the plug post 421 is provided with a channel 422, and the distal end of the reinforcing tube 8 is provided with a tapered head 81 for passing through the channel 422; the channel 422 is connected to the chamber 423, the first inner tube 3 passes through the channel 422, and the proximal end of the first inner tube 3 is connected to the transmission member 7 in the chamber 423; the second inner tube 2 extends inside the first inner tube 3 and passes through the channel 422 to be connected to the proximal end of the second housing 42.

[0094] In the implementation of the above scheme, the insertion post 421 is provided with a channel 422, and the far end of the reinforcing tube 8 is provided with a conical head 81. When the transmission component 7 moves axially along the second housing 42, the conical head 81 at the far end of the reinforcing tube 8 makes it easier for the reinforcing tube 8 to pass through the channel 422 in the insertion post 421, thereby improving the operability of the conveying device. At the same time, the channel 422 is connected to the chamber 423. The channel 422 in the insertion post 421 allows the first inner tube 3 to pass through the channel 422 and be fixedly connected to the transmission component 7 in the chamber 423. The second inner tube 2 passes through the channel 422 and is fixedly connected to the proximal end of the second housing 42.

[0095] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

[0096] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0097] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A heart valve prosthesis delivery device, characterized in that, include: A handle, an outer tube connected to the handle, and an inner tube assembly extending within the outer tube and rotatable relative to the outer tube in a circumferential direction; The inner tube assembly includes a first inner tube and a second inner tube extending inside the first inner tube, with a receiving space between the first inner tube and the second inner tube for accommodating a heart valve prosthesis. The proximal ends of both the first inner tube and the second inner tube are connected to the handle; the first inner tube includes an extension tube segment connected to the handle and extending distally within the outer tube, and a receiving tube segment protruding from the distal end of the outer tube to accommodate the heart valve prosthesis; the radial dimension of the receiving tube segment is larger than the radial dimension of the extension tube segment. The handle includes a first housing and a second housing connected to the first housing. The first housing is located at the distal end of the handle, and the second housing is located at the proximal end of the handle. The handle also includes a transmission component. A chamber is provided inside the second housing. The chamber extends axially along the second housing. The transmission component is installed inside the chamber and can rotate about the axis with the second housing. The transmission component is adapted to move relative to the chamber along the axis of the second housing, thereby driving the first inner tube to move axially relative to the second inner tube. The first housing has a insertion groove at its proximal end and the second housing has a insertion post at its distal end. The insertion post is inserted into the insertion groove. The insertion post has a locking element at its end. The first housing also has a receiving groove at its proximal end for accommodating the locking element. The receiving groove is connected to the insertion groove and allows the locking element to rotate.

2. The heart valve prosthesis delivery device according to claim 1, characterized in that, The second housing is circumferentially rotatable relative to the first housing. The first housing is provided with a fixing member, which is connected to the proximal end of the outer sleeve. The proximal end of the first inner tube is connected to the transmission component, and the proximal end of the second inner tube is connected to the second housing. When the transmission component rotates with the second housing relative to the first housing, the first inner tube and the second inner tube rotate synchronously circumferentially relative to the outer outer tube.

3. The heart valve prosthesis delivery device according to claim 2, characterized in that, The fastener includes a fixing post and a fixing part connected to the fixing post. The proximal end of the outer sleeve is fixedly connected to the fixing post. The first housing has an installation cavity, and the fixing post is embedded in the installation cavity. The fixing part has at least one fixing hole, and the first housing has at least one fixing mating hole corresponding to the fixing hole. Fasteners pass through the fixing hole and the fixing mating hole to fix the fastener to the first housing.

4. The heart valve prosthesis delivery device according to claim 3, characterized in that, Both the first inner tube and the second inner tube pass through the fixing member and are respectively connected to the transmission member and the proximal end of the second housing.

5. The heart valve prosthesis delivery device according to claim 3, characterized in that, A reinforcing tube is fitted onto the proximal end of the first inner tube, and the reinforcing tube is fixedly connected to the first inner tube. The proximal end of the reinforcing tube is fixedly connected to the transmission component.

6. The heart valve prosthesis delivery device according to claim 5, characterized in that, The reinforcing tube has multiple holes for applying adhesive.

7. The heart valve prosthesis delivery device according to claim 1, characterized in that, The second housing is also provided with a transmission rod, the distal end of which is fixedly connected to the transmission component. The proximal end of the transmission rod is provided with a sliding block. The second housing is also provided with a sliding groove, in which the sliding block is embedded and slides in cooperation with the sliding groove. The proximal end of the sliding groove is provided with a stop part for stopping and limiting the sliding block.

8. The heart valve prosthesis delivery device according to claim 7, characterized in that, The second housing is further provided with a drive assembly, which is used to drive the transmission rod to move axially relative to the handle; the drive assembly includes a first drive member, which is disposed on the transmission rod and threadedly connected to the transmission rod. The drive assembly further includes at least two second drive members, which are arranged circumferentially along the transmission rod. The second drive members are connected to the first drive member in a transmission manner, and the second drive members are used to drive the first drive member to rotate.

9. The heart valve prosthesis delivery device according to claim 1, characterized in that, The first housing is further provided with a locking engagement component, which cooperates with the locking component to lock or unlock the relative positions of the first housing and the second housing.

10. The heart valve prosthesis delivery device according to claim 9, characterized in that, The locking member includes a locking gear located at the end of the plug post, and the locking gear forms a plurality of locking grooves; The locking engagement member includes a movable member and at least one locking pin disposed on the movable member. When the movable member is driven, the movable member moves axially along the first housing, such that the locking pin is adapted to be inserted into or disengaged from the locking groove.

11. The heart valve prosthesis delivery device according to claim 10, characterized in that, The first housing has an installation notch; The movable component includes a driving block, a connecting block connected to the driving block, and a mounting block connected to the connecting block. The connecting block is slidably connected to the mounting notch. The driving block and the mounting block are located inside and outside the first housing, respectively, and the mounting block is provided with the locking pin.

12. The heart valve prosthesis delivery device according to claim 5, characterized in that, The insertion post has a channel, and the distal end of the reinforcing tube is provided with a tapered head for passing through the channel; The channel is connected to the chamber, the first inner tube passes through the channel, and the proximal end of the first inner tube is connected to the transmission component in the chamber; the second inner tube extends inside the first inner tube and passes through the channel to be connected to the proximal end of the second housing.

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