Anchoring element delivery device

Abstract

The present application relates to the technical field of medical devices, in particular to an anchor delivery device. The present application specifically discloses an anchor delivery device, comprising: a catheter, which is capable of being used for the anchor to pass through; a delivery device, which is capable of delivering the anchor to the entrance of the catheter; and a pushing device, which is capable of pushing the anchor located at the entrance of the catheter into the catheter until the anchor is pushed into the tissue along the catheter. The anchor delivery device is controllable in the delivery process, has good consistency of anchor connection, and is flexible and convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an anchor delivery device. Background Art

[0002] Annular dilatation is the most common cause of mitral and tricuspid valve disease, which can cause the leaflets to separate from each other, creating gaps and leading to valve regurgitation. Therefore, annular ring reduction surgery for annular dilatation is an important and basic procedure for mitral or tricuspid valve repair. Its principle is to target the insufficiency caused by annular dilatation by reducing the orifice area of ​​the mitral or tricuspid valve so that the leaflets can fit together, thereby reducing regurgitation or even completely eliminating regurgitation. Annular ring reduction surgery can be used alone to treat mitral and tricuspid regurgitation, or it can be combined with other repair techniques (such as leaflet repair and chordal implantation) to improve the success rate of surgery and prolong regurgitation-free survival time.

[0003] Traditional surgical annuli retraction requires thoracotomy, cardiac arrest, and extracorporeal circulation, resulting in significant trauma, high pain, and slow recovery. Many elderly and frail individuals cannot tolerate surgery. In recent years, the concept of minimally invasive transcatheter annuli retraction has emerged. This procedure uses imaging techniques and instruments to retract the mitral and tricuspid valves while the heart is beating.

[0004] During the annular retraction process, multiple anchors are typically inserted into the annular tissue. The multiple annuli are then connected via a thread. Finally, the thread is tightened, driving the multiple anchors to tighten around a central point. The thread is then knotted, locked, and cut to complete the procedure. However, existing technologies for delivering the anchors from outside the body and connecting them to the annular tissue are complex and cumbersome, hindering the rapid and accurate placement of the multiple anchors, significantly impacting the success rate of the procedure. Summary of the Invention

[0005] The purpose of the present invention is to provide an anchor conveying device, the conveying process of which is controllable, the anchor connection consistency is good, and the operation is flexible and convenient.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] An anchor conveying device, comprising:

[0008] a catheter into which an anchor can pass;

[0009] a delivery device capable of delivering the anchor to the inlet of the catheter; and

[0010] A pushing device is provided for pushing the anchor at the entrance of the catheter into the catheter until the anchor is pushed into the tissue along the catheter.

[0011] Optionally, it also includes:

[0012] The shell is hollow inside; the catheter is arranged in the shell, the delivery device is detachably connected to the shell, and the pushing device is movably arranged at one end of the shell.

[0013] Optionally, the delivery device includes a base plate connected to the housing and a cartridge body capable of accommodating the anchor, wherein the cartridge body is located on the base plate and can move toward the catheter to deliver the anchor therein to the inlet of the catheter.

[0014] Optionally, the shell is provided with a moving groove along the radial direction of the conduit, and the box body can move along the moving groove.

[0015] Optionally, the delivery device further comprises a cassette driving structure disposed on the bottom plate, wherein the cassette driving structure is configured to drive the cassette to move.

[0016] Optionally, the box body driving structure includes a gear and a rack meshing with the gear, the rack is arranged on the box body along the moving direction of the box body, and the gear is installed on the vertical plate of the bottom plate and connected to the knob handle.

[0017] Optionally, the box body is provided with a plurality of anchor accommodating grooves at intervals along its moving direction.

[0018] Optionally, the delivery device further comprises a first limiting structure provided on the base plate, wherein the first limiting structure is configured to cooperate with a plurality of ratchet grooves provided on the cassette body along the moving direction of the cassette body so that one of the anchor receiving grooves of the cassette body is aligned with the inlet of the catheter.

[0019] Optionally, the delivery device further comprises a tensioning wheel rotatably disposed on the base plate, wherein the tensioning wheel is used to store and tension the wire, and the free end of the wire can pass through the anchor and enter the catheter.

[0020] Optionally, the box body is provided with a pulley and a wire passing groove communicating with two adjacent anchor accommodating grooves, and the wire on the tensioning wheel passes through the pulley and the wire passing groove.

[0021] Optionally, the delivery device further comprises a second limiting structure, wherein the second limiting structure is configured to limit the rotation of the tensioning wheel.

[0022] Optionally, the pushing device includes a push rod, which is detachably provided at one end of the housing and can extend into the catheter, and the head end of the push rod can be movably connected to the anchor.

[0023] Optionally, the pushing device further includes a pushing handle, the pushing rod is connected to the pushing handle, and the pushing handle can enter the housing and be threadedly engaged with the housing.

[0024] Optionally, the push handle and the push rod can rotate relative to each other.

[0025] Optionally, the pushing device further includes a push rod limiting device, which is configured to limit the push rod from rotating within the catheter and the housing.

[0026] Optionally, a hemostasis valve and a flushing valve are provided at the inlet of the catheter.

[0027] The beneficial effects of the present invention are:

[0028] The anchor delivery device of the present invention delivers the anchor to the entrance of the catheter through a delivery device, and then pushes the anchor located at the entrance of the catheter into the catheter through a pushing device until the anchor is pushed into the tissue along the catheter, thereby realizing automatic delivery of the anchor; its delivery process is controllable, the anchor connection consistency is good, and the operation is flexible and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the anchor conveying device provided by the present invention at one viewing angle;

[0030] Figure 2 is a structural schematic diagram of the anchor conveying device provided by the present invention from another perspective;

[0031] Figure 3 is a schematic structural diagram of the delivery device provided by the present invention;

[0032] Figure 4 yes Figure 3 A schematic structural diagram of the box body;

[0033] Figure 5 1 is a schematic structural diagram of the anchor conveying device provided by the present invention with the upper portion of the housing removed;

[0034] Figure 6 It is a structural schematic diagram of the pushing device provided by the present invention;

[0035] Figure 7 It is a schematic structural diagram of the anchor delivered by the anchor delivery device provided by the present invention.

[0036] In the figure: 10-housing; 101-moving slot; 102-limiting slot; 20-conduit;

[0037] 1- delivery device; 11- bottom plate; 111- vertical plate; 12- box body; 121- wire groove; 122- anchor accommodating groove; 123- pulley; 124- ratchet groove; 125- sliding limit groove; 13- knob handle; 14- tensioning pulley; 15- gear; 16- rack; 17- first limit structure; 18- second limit structure;

[0038] 2- pushing device; 21- pushing rod; 22- pushing handle; 221- pushing handle section; 222- spiral section; 23- limiting plate; 24- limiting ball;

[0039] 30-column; 31-threading hole; 32-ring groove; 33-cone; 34-leaf-wing structure. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-7 The technical solution of the present invention is further illustrated through specific implementation methods.

[0041] The present invention provides an anchor delivery device specifically designed for delivering anchors into tissue. An anchor, as the name suggests, is a rivet-like component designed to form a connection with the tissue after insertion. Multiple anchors are connected in series via a thread. Pulling the thread can bring the tissues where the anchors connect together, narrowing the opening and achieving the surgical objective. This anchor delivery device is commonly used in procedures such as annuloplasty.

[0042] In the present invention, Figure 1 、 Figure 2 、 Figure 5 As shown, the anchor delivery device includes a catheter 20 through which the anchor can pass, a delivery device 1 that can deliver the anchor to the entrance of the catheter 20, and a pushing device 2 that can push the anchor at the entrance of the catheter 20 into the catheter 20 until the anchor is pushed into the tissue along the catheter 20. A hemostatic valve and a flushing valve are provided at the entrance of the catheter 20.

[0043] The anchor delivery device delivers the anchor to the entrance of the catheter 20 through the delivery device 1, and then pushes the anchor located at the entrance of the catheter 20 into the catheter 20 through the pushing device 2, until the anchor is pushed into the tissue along the catheter 20, thereby realizing automatic delivery of the anchor; its delivery process is controllable, the anchor connection consistency is good, and the operation is flexible and convenient.

[0044] Furthermore, if Figure 1 、 Figure 2 、 Figure 5As shown, the anchor delivery device further includes a hollow housing 10, wherein the housing 10 is tubular, a catheter 20 is disposed within the housing 10 along its axial direction, a delivery device 1 is detachably connected to the side of the housing 10, and a pushing device 2 is movably disposed at one end of the housing 10. During use, since the catheter 20, delivery device 1, and pushing device 2 are all disposed and operated based on the housing 10, they are interconnected and form a whole, which provides high consistency across multiple operations and is very convenient.

[0045] Furthermore, the delivery device 1 is disposed outside the inlet end of the housing 10, specifically, as Figure 3 As shown, the delivery device 1 includes a base plate 11 connected to the housing 10. The base plate 11 and the housing 10 can be fixedly connected (such as welded together) or detachably connected (connected by a connection structure, such as screws, etc.).

[0046] like Figure 3 As shown, the delivery device 1 further comprises a cartridge 12 capable of accommodating the anchor, the cartridge 12 being located on the bottom plate 11 and being movable toward the catheter 20 to deliver the anchor therein to the inlet of the catheter 20. Specifically, as Figure 2 As shown, the housing 10 is provided with a moving groove 101 along the radial direction of the catheter 20 (also the radial direction of the housing 10), and the cartridge body 12 can move along the moving groove 101 and pass through the housing 10. When the cartridge body 12 passes through the housing 10, the portion of the cartridge body 12 inside the housing 10 can be aligned with the entrance of the catheter 20, thereby facilitating the delivery of the anchor in the cartridge body 12 into the catheter 20.

[0047] like Figure 4 As shown, in order to ensure stable and reliable movement of the cassette body 12 and the housing 10, one of the cassette body 12 and the movable groove 101 is provided with a sliding limit groove 125, and the other is provided with a guide bar, which can be snapped into the sliding limit groove 125 to achieve guidance and fixation. Specifically, in this embodiment, the bottom of the cassette body 12 is provided with a sliding limit groove 125, and the bottom surface of the movable groove 101 is provided with a guide bar.

[0048] like Figure 3 As shown, the delivery device 1 also includes a cassette driving structure provided on the base plate 11, and the cassette driving structure is configured to drive the cassette 12 to move. Optionally, the cassette driving structure includes a gear 15 and a rack 16 meshing with the gear 15, the rack 16 being provided on the cassette 12 along the moving direction of the cassette 12, and the gear 15 being mounted on the vertical plate 111 of the base plate 11 and connected to the knob handle 13. When in use, by rotating the knob handle 13, the gear 15 can be driven to rotate, and the gear 15 can drive the rack 16 to perform linear motion, thereby driving the cassette 12 to move. Optionally, as Figure 4 As shown, the rack 16 and the box body 12 are an integrated structure.

[0049] like Figure 4 As shown, the box body 12 is provided with an anchor receiving groove 122, which is used to accommodate the anchor, and the anchor receiving groove 122 passes through the box body 12 along a horizontal direction perpendicular to its moving direction (that is, along the central axis direction of the catheter 20), thereby facilitating the pushing of the anchor therein into the catheter 20.

[0050] To enable delivery of multiple anchors into tissue at once, the cartridge body 12 is provided with multiple anchor receiving slots 122, which are spaced apart along the direction of movement of the cartridge body 12. When delivering anchors through the multiple anchor receiving slots 122 of the cartridge body 12, the anchors are sequentially passed through the wires, with the free ends of the wires entering the catheter 20 and exiting from the other end of the catheter 20. Therefore, sufficient anchors can be loaded at once before use, allowing for continuous insertion of the anchors, facilitating operation.

[0051] like Figure 3 As shown, the delivery device 1 further includes a first limiting structure 17 provided on the base plate 11. The first limiting structure 17 is configured to prevent the cartridge body 12 from reversely moving and causing misalignment when one of the anchor receiving grooves 122 of the cartridge body 12 is aligned with the inlet of the catheter 20, thereby ensuring that the cartridge body 12 is stably placed after entering the housing 10, so that the anchor receiving groove 122 aligned with the inlet of the catheter 20 is stably aligned with the inlet of the catheter 20, facilitating the pushing device 2 to push the anchor.

[0052] Optionally, the first limiting structure 17 includes a first limiting rod, and the box body 12 is provided with a plurality of ratchet grooves 124 along its moving direction, and the first limiting rod can cooperate with any ratchet groove 124 to limit the position. The first limiting rod is movably provided on the bottom plate 11, and when the box body 12 moves, it can push it backward and automatically enter a ratchet groove 124 when it corresponds to the ratchet groove 124.

[0053] To prevent the first limiting rod from retreating too far and being unable to enter the ratchet gear 124 , the first limiting structure 17 further includes a first limiting column located at the rear end of the first limiting rod and configured to limit the first limiting rod.

[0054] For easy operation, the ratchet groove 124 is located on one side of the box body 12 .

[0055] In order to ensure that the wire passing through the anchor and the catheter 20 remains in a taut state, Figure 3 As shown, the delivery device 1 also includes a tensioning wheel 14 arranged on the base plate 11. The tensioning wheel 14 is used to store and tension the wire. An annular wire storage groove is opened on its outer periphery, and the wire is wound therein; and the tensioning wheel 14 can rotate. By rotating the tensioning wheel 14, the tensioning degree of the wire can be adjusted in real time.

[0056] like Figure 4As shown, in order to ensure that the wire passes through smoothly, the box body 12 is provided with a pulley 123 and a wire groove 121 connecting two adjacent anchor accommodating grooves 122. The wire on the tensioning wheel 14 passes through the pulley 123 and the wire groove 121, and then enters the catheter 20, so that the pulley 123 serves as a transition device for the wire between the tensioning wheel 14 and the anchor, making the threading smooth.

[0057] like Figure 3 As shown, the tensioning wheel 14 can rotate relative to the bottom plate 11 and has a spiral spring inside, thereby achieving the purpose of releasing and tightening the line. The delivery device 1 also includes a second limiting structure 18, which is configured to limit the rotation of the tensioning wheel 14. Specifically, as shown in FIG. Figure 3 As shown, the second limiting structure 18 can cooperate with any one of the plurality of tooth grooves provided on the periphery of the tensioning wheel 14 , thereby limiting the position of the tensioning wheel 14 .

[0058] like Figure 5 、 Figure 6 As shown, the pushing device 2 of the present invention includes a push rod 21, which is detachably disposed at the entrance of the housing 10 and can extend into the catheter 20. The head end of the push rod 21 can be movably connected to the anchor. When the head end of the push rod 21 and the anchor are well matched, the two can move in a stable manner, thereby ensuring stable delivery of the anchor.

[0059] In order to facilitate operation, the pushing device 2 also includes a pushing handle 22, and the pushing rod 21 is connected to the pushing handle 22. The pushing handle 22 can enter the outer shell 1 and cooperate with the outer shell 1 through threads. Through the threaded cooperation between the pushing handle 22 and the outer shell 1, the forward movement of the pushing handle 22 and the pushing rod 21 is relatively stable. The distance that the pushing handle 22 is screwed into the outer shell 1 can also be accurately controlled by the thread, thereby controlling the distance that the pushing rod 21 enters the catheter 20, so that the anchors can be pushed very accurately, avoiding the phenomenon that some anchors are pushed too deep into the tissue and some are too shallow, resulting in inconsistent connection between the anchors and the tissue. In addition, due to the threaded cooperation, no matter who uses it, the pushing speed of the pushing handle 22 is constant, ensuring stability during use. Further, if Figure 5 、 Figure 6 As shown, the push handle 22 includes a push handle section 221 and a spiral section 222 connected to each other, and the spiral section 222 can be threadedly matched with the housing 1.

[0060] During the process of the push rod 21 pushing the anchor, the front end of the push rod 21 is provided with a structure that can cooperate with the anchor. In order to prevent the push rod 21 from driving the anchor to rotate in the catheter 20, the push handle 22 and the push rod 21 can rotate relative to each other, thereby ensuring that when the push handle 22 rotates, the push rod 21 can only move linearly without rotating. Figure 6As shown, a limiting ball 24 is movably provided in the push handle 22, and the push rod 21 is connected to the limiting ball 24. In order to facilitate the limiting ball 24 to be installed in the push handle 22, the periphery of the push handle 22 is provided with a disassembled cover plate.

[0061] In order to prevent the push rod 21 from rotating, Figure 5 、 Figure 6 As shown, the pushing device 2 further includes a push rod limiting device, which is configured to limit the rotation of the push rod 21 within the catheter 20 and the housing 10, thereby preventing the lines of the serial anchor from becoming entangled within the catheter 20. Optionally, the push rod limiting device includes a limiting plate 23 connected to the push rod 21. A limiting groove 102 is defined in the housing 1, and the limiting plate 23 is movably disposed in the limiting groove 102 along the central axis of the housing 10. The limiting plate 23 is fixedly connected to the push rod 21, or the limiting plate 23 and the push rod 21 are slidably connected along the central axis of the housing 10, but the two cannot rotate relative to each other.

[0062] The catheter 20 of the present invention is made of a multi-layer braided tube or a polymer tube, has good flexibility, can realize the introduction of the anchor, and has a bending radius of less than 15 mm.

[0063] In the present invention, the anchor delivered by the anchor delivery device, such as Figure 7 As shown, the anchor comprises a post 30 and a leaf-wing structure 34 disposed around and movably connected to the post 30. The post 30 is provided with a threading hole 31 for threading a wire. The leaf-wing structure 34 can be retracted or extended relative to the post 30, and the leaf-wing structure 34 and the post 30 can rotate relative to each other. The leaf-wing structure 34 is rotatably connected via an annular groove 32 on the post 30. A cone 33 is provided at the front end of the post 30 to facilitate tissue penetration.

[0064] During transportation, a plurality of the above-mentioned anchors are strung on the thread body through the threading hole 31 , and the free end of the thread body is pre-threaded into the catheter 20 until it passes through the other end of the catheter 20 .

[0065] The anchors are then placed in the anchor receiving grooves 122 in sequence, with the blade-wing structures 34 of the anchors in a folded state, with the cones 33 facing one end of the catheter 20 , and the wires between the anchors pass through the pulleys 123 into the wire grooves 121 .

[0066] Rotating the knob handle 13 drives the gear 15 and the rack 16 to engage, thereby driving the box body 12 to enter the movable groove 101 until the first anchor receiving groove 122 is aligned with the entrance of the catheter 20. Then, the knob handle 13 is stopped from rotating. At this time, the first limiting structure 17 is engaged with the ratchet groove 124, limiting the box body 12 in the reverse direction.

[0067] Align the push rod 21 of the pushing device 2 with the current anchor receiving groove 122 and push the anchor into the catheter 20. Continue pushing until the spiral section 222 is threadedly connected with the housing 10. Then, begin precise pushing, and finally push the anchor along the catheter 20 into the tissue. After pushing is completed, rotate the push handle 22 in the opposite direction to unscrew the spiral section 222 out of the housing 10, and then withdraw the pushing device 2.

[0068] The knob handle 13 is rotated to continuously move the cartridge body 12 , and the above-mentioned actions are repeated to continuously push multiple anchors into the tissue.

[0069] During the continuous pushing process, the cartridge 12 moves from one side of the housing 10 to the other side.

[0070] The pushing device 2 of the present invention is integrally connected to the housing 10. In this case, the push rod 21 is a telescopic structure, extending when pushing the anchor and retracting when not pushing. Of course, the pushing device 2 and the housing 10 can also be separated, and can be connected to the housing 10 when pushing the anchor and removed when not pushing the anchor.

[0071] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and are not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will readily conceive of other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the present invention.

Claims

1. An anchor conveying device, characterized in that: include: a catheter (20) through which an anchor can pass; a delivery device (1) capable of delivering the anchor to the entrance of the catheter (20); and A pushing device (2) capable of pushing the anchor located at the entrance of the catheter (20) into the catheter (20) until the anchor is pushed into the tissue along the catheter (20); It also includes a housing (10) having a hollow interior; The anchor comprises a column (30) and a leaf-wing structure (34) arranged around the column (30) and movably connected to the column (30); The delivery device (1) comprises a bottom plate (11) connected to the housing (10) and a box body (12) capable of accommodating an anchor. The box body (12) is located on the bottom plate (11) and can move toward the catheter (20) to deliver the anchor therein to the entrance of the catheter (20). The box body (12) is provided with a plurality of anchor accommodating grooves (122) spaced apart along its moving direction. The delivery device (1) further comprises a tensioning wheel (14) rotatably arranged on the base plate (11), wherein the tensioning wheel (14) is used to store and tension the wire, wherein the free end of the wire can pass through the anchor and enter the catheter (20); The pushing device (2) includes a push rod (21), which is detachably arranged at one end of the housing (10) and can be inserted into the catheter (20), and the head end of the push rod (21) can be movably connected to the anchor; The pushing device (2) further comprises a pushing handle (22), the pushing rod (21) is connected to the pushing handle (22), and the pushing handle (22) can enter the housing (10) and be threadedly engaged with the housing (10); The pushing device (2) further includes a push rod limiting device, the push rod limiting device including a limiting plate (23) connected to the push rod (21), a limiting groove (102) is provided in the housing (10), the limiting plate (23) is movable along the central axis direction of the housing (10) and is arranged in the limiting groove (102), and the push rod limiting device is configured to limit the push rod (21) from rotating in the conduit (20) and the housing (10).

2. The anchor conveying device according to claim 1, characterized in that: The catheter (20) is arranged in the shell (10), the delivery device (1) is detachably connected to the shell (10), and the pushing device (2) is movably arranged at one end of the shell (10).

3. The anchor conveying device according to claim 1, characterized in that: The housing (10) is provided with a moving groove (101) along the radial direction of the conduit (20), and the box body (12) is capable of moving along the moving groove (101).

4. The anchor conveying device according to claim 3, characterized in that: The delivery device (1) further comprises a cassette driving structure disposed on the base plate (11), wherein the cassette driving structure is configured to drive the cassette (12) to move.

5. The anchor conveying device according to claim 4, characterized in that: The box body driving structure includes a gear (15) and a rack (16) meshing with the gear (15), wherein the rack (16) is arranged on the box body (12) along the moving direction of the box body (12), and the gear (15) is installed on the vertical plate (111) of the bottom plate (11) and is connected to the knob handle (13).

6. The anchor conveying device according to claim 1, characterized in that: The delivery device (1) further comprises a first limiting structure (17) provided on the base plate (11), wherein the first limiting structure (17) is configured to cooperate with a plurality of ratchet grooves (124) provided on the cassette body (12) along the moving direction of the cassette body (12) so as to align one of the anchor receiving grooves (122) of the cassette body (12) with the inlet of the catheter (20).

7. The anchor conveying device according to claim 1, characterized in that: The box body (12) is provided with a pulley (123) and a wire groove (121) communicating with two adjacent anchor accommodating grooves (122); the wire on the tensioning wheel (14) passes through the pulley (123) and the wire groove (121).

8. The anchor conveying device according to claim 1, characterized in that: The delivery device (1) further comprises a second limiting structure (18), wherein the second limiting structure (18) is configured to limit the rotation of the tensioning wheel (14).

9. The anchor conveying device according to claim 1, characterized in that: The push handle (22) and the push rod (21) can rotate relative to each other.

10. The anchor conveying device according to claim 1 or 2, characterized in that: A hemostatic valve and a flushing valve are provided at the inlet of the catheter (20).

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