conveyor

Abstract

The present application relates to a kind of conveyors, the conveyor includes guide head, sheath core pipe, guide rod and sheath core adjusting device, the sheath core adjusting device is movably connected with the proximal end of the guide rod so that the sheath core adjusting device can be axially slid relative to the guide rod, the sheath core pipe is threaded the guide rod, and the distal end of the sheath core pipe is fixedly connected with the guide head, and the proximal end of the sheath core pipe is fixedly connected with the sheath core adjusting device. The conveyor can avoid interference of distal end component.

Description

Technical Field

[0001] This invention relates to the field of interventional medical devices, and in particular to a delivery device. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] In recent years, interventional treatment of cardiovascular diseases has become an increasingly important approach. With the continuous development of interventional techniques, the advantages of using covered stents to treat aneurysms and aortic dissections have become increasingly prominent. A covered stent is an artificial stent adapted to the size of the blood vessel. It mainly consists of a covering and a supporting framework. The covering is generally made of polyester or e-PTFE membrane, while the supporting framework is mainly woven from stainless steel wire or nickel-titanium alloy wire. The procedure involves first compressing the covered stent into the sheath of the delivery device. The blood vessel is typically punctured at the femoral artery location. A guidewire is used to establish a path, and the delivery device is guided through the femoral artery—iliac artery—abdominal aorta—thoracic aorta—aortic arch—ascending aorta to establish a delivery route. The covered stent is then delivered to the designated location of the lesion. After release, the covered stent adheres tightly to the aneurysm wall. The covering isolates blood flow from the lesion, eliminating the impact of blood flow on the aneurysm wall or aortic dissection, establishing a channel for normal blood circulation. Finally, the guidewire and delivery device are withdrawn, completing the interventional treatment of aneurysms and aortic dissections.

[0004] Currently, the most common methods for releasing covered stents are conventional release and proximal post-release. Conventional release involves pushing the delivery sheath containing the covered stent to the pre-designated vessel location, then retracting the sheath to axially separate the stent from the delivery sheath, thus releasing the stent. Proximal post-release involves pushing the delivery sheath containing the covered stent to the pre-designated vessel location, first retracting the sheath to release the distal end of the covered stent, and then opening the post-release device to release the proximal end of the covered stent, thereby completing the release.

[0005] For surgeries requiring branch vessel access, a pre-placed guidewire is typically installed on the delivery system. After the main stent is deployed, the delivery system is not immediately removed. Instead, the pre-placed guidewire is advanced into the branch vessel to establish a guidewire pathway. Common delivery systems include a TIP tip and sheath core. For systems with post-deployment capabilities, a post-stent deployment device is also included. During the advancement of the pre-placed guidewire after main stent deployment, these distal components—the TIP tip, sheath core, and post-deployment device—within the deployed stent cavity can interfere with guidewire advancement, increasing the difficulty of advancing the pre-placed guidewire into the branch vessel and hindering the normal progress of the clinical procedure. Summary of the Invention

[0006] Therefore, it is necessary to provide a transmitter that can avoid interference from remote components.

[0007] A conveyor includes a guide head, a sheath core tube, a guide rod, and a sheath core adjustment device. The sheath core adjustment device is movably connected to the proximal end of the guide rod, allowing the sheath core adjustment device to slide axially relative to the guide rod. The sheath core tube passes through the guide rod, and the distal end of the sheath core tube is fixedly connected to the guide head. The proximal end of the sheath core tube is fixedly connected to the sheath core adjustment device.

[0008] In one embodiment, the sheath core adjustment device includes a drive member and a fixing member connected to the proximal end of the drive member. The proximal end of the sheath core tube is fixedly connected to the fixing member, and the drive member is movably connected to the proximal end of the guide rod, allowing the sheath core adjustment device to slide axially relative to the guide rod.

[0009] In one embodiment, the driving member includes a guide and a knob. The distal end of the guide is connected to the guide rod, the knob is sleeved on the guide, and the proximal end of the knob is connected to the fixing member. The knob can slide axially along the guide to drive the fixing member to slide axially.

[0010] In one embodiment, both the guide and the knob are provided with threads, and the guide and the knob are engaged by the threads so that the knob can slide axially along the guide, thereby causing the fixing member to slide axially.

[0011] In one embodiment, the guide includes a guide shaft with threads on its surface. The knob includes an outer periphery and a first end and a second end connected to the two ends of the outer periphery, respectively. The first end has a threaded hole, and the threads engage with the threaded hole to allow the knob to slide axially along the guide shaft.

[0012] In one embodiment, the guide further includes a limiting member connected to the guide shaft, and the outer surface of the limiting member is threaded, and the inner surface of the outer periphery is threaded, the thread on the limiting member engaging with the thread on the outer periphery.

[0013] In one embodiment, the guide includes a guide shaft, the knob has an inner cavity, the knob is sleeved on the guide shaft, the inner wall of the knob is threaded, the fixing member includes a sheath core fixing part and a knob fixing part connected to the distal end of the sheath core fixing part, the sheath core fixing part is fixedly connected to the sheath core tube, the outer surface of the knob fixing part is threaded, the knob fixing part is movably received in the inner cavity of the knob, and the thread on the knob and the thread on the knob fixing part cooperate so that when the knob is in a rotating state, the fixing member can slide axially.

[0014] In one embodiment, the conveyor further includes a pre-positioned wire guide device, which is provided with a wire guide tube or a wire guide channel;

[0015] The pre-placed guide wire device is connected to the proximal end of the guide rod; or, the conveyor further includes an outer sheath tube, which is slidably fitted onto the sheath core tube along the axial direction, and the proximal end of the outer sheath tube is received in the guide rod, with the pre-placed guide wire device fitted onto the outer sheath tube.

[0016] In one embodiment, the conveyor includes at least two guide wires, one of which guides the conveyor and at least one of which is partially housed in the guide wire tube or guide wire channel of the pre-positioned guide wire device.

[0017] In one embodiment, the guide head has a groove extending inward from the outer surface of the guide head, the groove having a bottom surface and a sidewall surrounding the bottom surface, the sidewall including a distal side surface, the bottom surface and the distal side surface smoothly transitioning to form a slope.

[0018] The aforementioned delivery device includes a sheath core adjustment device that is movably connected to the guide rod. Since the distal end of the sheath core tube is fixedly connected to the guide head and the proximal end of the sheath core tube is fixedly connected to the sheath core adjustment device, when the sheath core adjustment device slides axially along the guide rod towards the proximal end, it drives the sheath core tube and the guide head to slide axially towards the proximal end, so as to avoid interference of the sheath core tube and the guide head (i.e., the distal component) with subsequent operations and facilitate the normal conduct of clinical operations. Attached Figure Description

[0019] Figure 1 This is a schematic outline of a conveyor according to one embodiment;

[0020] Figure 2 This is a schematic diagram of the structure of a conveyor according to one embodiment;

[0021] Figure 3 This is a schematic diagram of the connection between the guide head and the sheath core tube in one embodiment;

[0022] Figure 4 This is a schematic diagram of the support tube structure according to one embodiment;

[0023] Figure 5 This is a schematic diagram of the structure of a fixed handle according to one embodiment;

[0024] Figure 6 This is a schematic diagram of the structure of a movable handle according to one embodiment;

[0025] Figure 7 This is a schematic diagram of the guide rod in one embodiment;

[0026] Figure 8 This is a schematic diagram of the structure of a pre-placed guide wire device according to one embodiment;

[0027] Figure 9 for Figure 2 The image is enlarged;

[0028] Figure 10 This is a schematic diagram of the structure of a sheath core adjustment device according to one embodiment;

[0029] Figure 11 This is a schematic diagram of the sheath core adjustment device according to another embodiment;

[0030] Figure 12 This is a schematic diagram of the structure of a guide component according to one embodiment;

[0031] Figure 13 This is a schematic diagram of the guide component according to another embodiment;

[0032] Figure 14 This is a schematic diagram of the structure of a knob according to one embodiment;

[0033] Figure 15 This is a schematic diagram of the structure of a knob according to another embodiment;

[0034] Figure 16 This is a schematic diagram of the structure of a fastener according to one embodiment;

[0035] Figure 17 This is a schematic diagram showing the knob and guide in a partially separated state according to one embodiment;

[0036] Figure 18 This is a schematic diagram showing the sheath core tube and guide head of a conveyor in a retracted state according to one embodiment;

[0037] Figure 19 This is a schematic diagram of the guide component according to another embodiment;

[0038] Figure 20 This is a schematic diagram of the structure of a knob according to another embodiment;

[0039] Figure 21 This is a schematic diagram of the fastener structure according to another embodiment;

[0040] Figure 22 This is a schematic diagram of the loading state of the sheath core adjustment device according to another embodiment;

[0041] Figure 23 This is a schematic diagram showing the knob and guide in a partially separated state according to another embodiment;

[0042] Figure 24 This is a partial structural schematic diagram of a conveyor according to another embodiment. Detailed Implementation

[0043] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0045] In the field of interventional medical devices, "distal" is defined as the end furthest from the operator during surgery, and "proximal" is defined as the end closest to the operator during surgery. "Axial" refers to the direction parallel to the line connecting the center of the distal and proximal ends of the medical device, and "radial" refers to the direction perpendicular to the aforementioned axial direction.

[0046] Please refer to the following: Figure 1 and Figure 2 One embodiment of the conveyor 100 includes a guide head 10, a sheath core tube 20, a support tube 30, an outer sheath tube 40, a fixed handle 50, a movable handle 60, a guide rod 70, a pre-positioned guide wire device 80, and a sheath core adjustment device 90.

[0047] The sheath core adjustment device 90 is movably connected to the proximal end of the guide rod 70, allowing the sheath core adjustment device 90 to slide axially relative to the guide rod 70. The sheath core tube 20 passes through the guide rod 70, and the distal end of the sheath core tube 20 is fixedly connected to the guide head 10. The proximal end of the sheath core tube 20 is fixedly connected to the sheath core adjustment device 90, enabling the sheath core adjustment device 90 to drive the sheath core tube 20 and the guide head 10 to slide axially proximally, thereby avoiding interference from the sheath core tube 20 and the guide head 10 (i.e., the distal component) to subsequent operations and facilitating the normal conduct of clinical procedures.

[0048] like Figure 3 The guide head 10 is generally a conical structure with an inner cavity, and the tip of the conical structure is located at the distal end to facilitate the entry of the delivery device 100 into the body. The proximal end of the guide head 10 has an opening. One end of the sheath core tube 20 extends from the proximal opening of the guide head 10 into the inner cavity of the guide head 10 and is fixedly connected to the guide head 10. In one embodiment, the guide head 10 has a groove extending radially from its outer surface to its inner surface, i.e., the opening of the groove is located on the circumferential surface of the guide head 10, and the groove is not in communication with the inner cavity of the guide head 10. The groove has a bottom surface and sidewalls surrounding the bottom surface. The sidewalls include a distal side surface, and the bottom surface and the distal side surface smoothly transition to form a slope.

[0049] The sheath core tube 20, support tube 30, and outer sheath tube 40 are all hollow tubular components and are coaxial. The support tube 30 is sleeved on the sheath core tube 20 and is fixedly connected to the sheath core tube 20. The support tube 30 does not completely cover the sheath core tube 20, leaving the distal end of the sheath core tube 20 exposed. The outer sheath tube 40 is sleeved on the support tube 30 and can slide axially relative to the support tube 30 until it can fit over the area of ​​the sheath core tube 20 not covered by the support tube 30. Thus, the outer sheath tube 40 and the sheath core tube 20 form an annular accommodating cavity (not shown), which is used to accommodate the covered stent (not shown).

[0050] Please see Figure 4 The support tube 30 has a central through hole 310 extending axially from its distal end to its proximal end, through which it is fitted onto the sheath core tube 20. The sidewall of the support tube 30 has side holes 320 extending axially from its distal end to its proximal end. The number of side holes 320 can be one, two, or three. When there are multiple side holes 320, they are spaced apart. In one embodiment, there are two side holes 320, symmetrically arranged about the longitudinal central axis of the support tube 30.

[0051] The fixed handle 50 is a hollow structure with openings at both ends, such as... Figure 5 As shown. The movable handle 60 is also a hollow structure with openings at both ends, as... Figure 6 As shown. Figure 7The guide rod 70 is generally a hollow rod-shaped structure. The distal end of the guide rod 70 extends into the fixed handle 50 and is fixedly connected to it. The proximal end of the guide rod 70 extends into the movable handle 60, protruding from the proximal end of the movable handle 60 and extending axially towards the proximal end. The fixed handle 50 is fixedly connected to the guide rod 70, and the movable handle 60 can slide axially along the guide rod 70.

[0052] In one embodiment, the outer wall of the guide rod 70 is provided with an external thread (not shown), and the inner wall of the movable handle 60 is provided with a structure that matches the external thread, so that the movable handle 60 can slide axially relative to the fixed handle 50 along the guide rod 70.

[0053] The proximal end of the outer sheath 40 extends into the guide rod 70 and is fixedly connected to the movable handle 60, so that when the movable handle 60 slides axially along the guide rod 70, it drives the outer sheath 40 to slide axially, thereby releasing or partially releasing the covered stent. In one embodiment, the guide rod 70 has an internal cavity, and an opening 710 is formed on the side wall of the guide rod 70. In the radial direction, the opening 710 extends from the outer surface of the guide rod 70 toward the cavity and communicates with the inner cavity. Furthermore, the opening 710 extends axially along the guide rod 70. The outer sheath 40 is fixedly connected to the movable handle 60 by a fastener (not shown). Specifically, one end of the fastener is connected to the outer sheath 40, and the other end extends from the opening 710 to the outside of the guide rod 70 and is fixedly connected to the movable handle 60. For example, a fixing plate 610 (e.g., ...) is provided in the inner cavity of the movable handle 60. Figure 6 As shown), one end of the fastener extending from the opening 710 is fixedly connected to the fixing plate 610.

[0054] Please see Figure 8 In one embodiment, the pre-positioned guide wire device 80 includes a body 810 and a guide wire tube 820. The body 810 is a hollow shell, and the guide wire tube 820 is housed within the inner cavity of the body 810. The body 810 includes a first connecting portion 812, a side connecting portion 814, and a second connecting portion 816, with both ends of the side connecting portion 814 connected to the first connecting portion 812 and the second connecting portion 816, respectively.

[0055] The first connecting portion 812 and the second connecting portion 816 are hollow cylinders. The side connecting portion 814 has an inner cavity, and this inner cavity communicates with the inner cavities of the first connecting portion 812 and the second connecting portion 816, together forming the inner cavity of the body 810. A through hole is provided on the end face of the first connecting portion 812 away from the side connecting portion 814.

[0056] The side connection portion 814 has a first surface 814A and a second surface 814B, both of which are curved surfaces. For example, both the first surface 814A and the second surface 814B are conical surfaces, but they face opposite directions. The first surface 814A and the second surface 814B form a structure that is larger at both ends and smaller in the middle. The first surface 814A is located at the far end, and the second surface 814B is located at the near end. The first surface 814A is connected to the outer surface of the first connecting portion 812, and the second surface 814B is connected to the outer surface of the second connecting portion 816. The first surface 814A and the second surface 814B intersect at the middle part of the side connection portion 814. Furthermore, the radial width of the middle portion is greater than the radial width of the first connecting portion 812 and the second connecting portion 816, so that the side connecting portion 814 protrudes radially relative to the first connecting portion 812 and the second connecting portion 816. That is, the middle portion of the side connecting portion 814 is further away from the axial central axis VIII-VIII of the pre-positioned guide wire device 80 in the radial direction than the connection portion of the side connecting portion 814 with the first connecting portion 812 and the second connecting portion 816.

[0057] An opening is provided on the side connection portion 814, extending from the second surface 814B to the inner cavity of the side connection portion 814.

[0058] In one embodiment, the distal end of the first connecting portion 812 is connected to the proximal end of the support tube 30, and the first connecting portion 812 communicates with the side hole 320 of the support tube 30. The guide wire tube 820 extends from the side connection portion 814 to the first connecting portion 812, and the guide wire tube 820 communicates the opening of the side connection portion 814 and the through hole of the first connecting portion 812. The guide wire can enter the side hole 320 of the support tube 30 from the guide wire tube 820 and extend out of the side hole 320 such that the distal end of the guide wire is located outside the support tube 30.

[0059] In one embodiment, the pre-placed guide wire device 80 further includes a first connecting tube 830 and a second connecting tube 840. Both the first connecting tube 830 and the second connecting tube 840 are axially arranged. The distal end of the first connecting tube 830 is connected to the distal end of the first connecting portion 812, and the proximal end of the second connecting tube 840 is connected to the proximal end of the second connecting portion 816. Furthermore, the proximal end of the first connecting tube 830 is connected to the distal end of the second connecting tube 840, and the first connecting tube 830 and the second connecting tube 840 communicate with each other. The first connecting tube 830 communicates with the through hole of the first connecting portion 812.

[0060] The distal end of the guidewire tube 820 is connected to the distal end of the first connecting tube 830, and the proximal end is connected to the proximal end of the side connection portion 814. The guidewire tube 820 is connected to the first connecting tube 830 and to the opening of the side connection portion 814.

[0061] In one embodiment, there are two guide wire tubes 820, which are symmetrically arranged about the second connecting tube 840 as the axis of symmetry.

[0062] The body 810, the guide wire tube 820 and / or the connecting tube can be integrally molded, for example, by integral injection molding to form the pre-installed guide wire device 80.

[0063] In another embodiment, the body 810 is a solid structure, with a first channel, a second channel, and a third channel formed therein. The first channel corresponds to the guide wire tube 820, the second channel corresponds to the first connecting tube 830, and the third channel corresponds to the second connecting tube 840. "Corresponding" refers to the correspondence in position, connection relationship, and function; further details regarding the first, second, and third channels are omitted here.

[0064] Please refer to the following: Figure 1 and Figure 8 In one embodiment, a pre-positioned guide wire device 80 is sleeved on the guide rod 70 and is fixedly or detachably connected to the guide rod 70. For example, the outer diameter of the first connecting portion 812 of the body 810 is larger than the outer diameter of the guide rod 70, and the first connecting portion 812 is sleeved on the guide rod 70 and is fixedly or detachably connected to the guide rod 70.

[0065] In another embodiment, the body 810 and the guide rod 70 are an integral structure, for example, an integral structure formed by injection molding.

[0066] Please see Figure 9 The proximal end of the support tube 30 extends into the first connecting tube 830, and the proximal end of the sheath core tube 20 extends from the middle through hole 310 (not shown in the figure) of the support tube 30 to the outside of the proximal end face of the support tube 30 and extends into the second connecting tube 840. The guide wire tube 820 communicates with the side hole 320 of the support tube 30. The opening on the side connection part 814 serves as the inlet of the guide wire. The guide wire enters the guide wire tube 820 from this inlet, then extends into the side hole 320 of the support tube 30, and after extending out of the support tube 30, the distal end of the guide wire is received in the groove on the guide head 10.

[0067] A side connection portion 814 is provided, and an opening for guide wire entry is provided on the second surface 814B of the side connection portion 814 to facilitate guide wire entry.

[0068] It is understood that in other embodiments, the side connection portion 814 may be omitted. When the side connection portion 814 is omitted, the inlet for the guidewire is opened on the first connection portion 812, and the proximal end of the guidewire tube 820 is connected to the proximal end of the first connection portion 812.

[0069] Please see Figure 10The sheath core adjustment device 90 includes a driving component 910 and a fixing component 920. The driving component 910 includes a guide component 912 and a knob 914. The fixing component 920 is used to fix the sheath core tube 20. The driving component 910 is used to drive the fixing component 920 to slide axially, thereby driving the sheath core tube 20 to slide axially.

[0070] In one embodiment, the distal end of the guide member 912 is fixedly connected to the second connecting portion 816, thereby fixing the sheath core adjusting device 90 to the pre-positioned guide wire device 80. In one embodiment, as... Figure 11 As shown, the guide member 912 and the second connecting part 816 are an integral structure. Alternatively, the guide member 912 and the body 810 are an integral structure.

[0071] Please see Figure 12 The guide member 912 includes a guide shaft 9122, a positioning shaft 9124, and a limiting member 9126. The guide shaft 9122 is generally cylindrical, with a threaded or toothed structure (not shown) formed on its outer surface. A through hole 9128 is provided in the middle of the guide shaft 9122, extending axially from one end to the other. The diameter of the through hole 9128 is not less than the outer diameter of the sheath core tube 20. The positioning shaft 9124 is cylindrical. The distal end of the positioning shaft 9124 is fixedly connected to the proximal end of the guide shaft 9122, that is, the positioning shaft 9124 is located at the proximal end of the guide shaft 9122. The length of the positioning shaft 9124 is less than the length of the guide shaft 9122. In one embodiment, the guide shaft 9122 and the positioning shaft 9124 are an integral structure. For example, a threaded or toothed structure is formed on the outer surface of a portion of a cylindrical rod, and a through hole 9128 is correspondingly opened to form a guide shaft 9122, while another portion of the cylindrical rod forms a positioning shaft 9124, or the other portion of the cylindrical rod is adjusted in diameter by cutting or other processing to form a positioning shaft 9124.

[0072] In one embodiment, the limiting member 9126 is a ring structure, sleeved on the positioning shaft 9124, and adjacent to or abutting against the proximal end of the guide shaft 9122. The outer diameter of the limiting member 9126 is larger than the outer diameters of both the guide shaft 9122 and the positioning shaft 9124. In this embodiment, the limiting member 9126 is an integral structure.

[0073] In another embodiment, the limiting member 9126 is a discrete structure. The limiting member 9126 consists of multiple independent limiting blocks (not shown), which are spaced apart circumferentially along the positioning shaft 9124. The radial width of each limiting block should be sufficiently large so that the outer diameter of the limiting member 9126 is greater than the outer diameters of the guide shaft 9122 and the positioning shaft 9124. It is understood that the specific shape of the limiting blocks is not limited, as long as the radial width meets the above requirements.

[0074] In another embodiment, such as Figure 13 As shown, a threaded structure or a toothed structure is formed on the outer peripheral surface of the limiting member 9126.

[0075] Please refer to the following: Figure 11 and Figure 14 The knob 914 is generally a hollow cylindrical structure. The knob 914 includes an outer peripheral portion 9142, a first end portion 9144, and a second end portion 9146. The outer peripheral portion 9142 forms a hollow cylinder, and the first end portion 9144 and the second end portion 9146 are located at the distal and proximal ends of the outer peripheral portion 9142, respectively. A threaded hole 9143 is provided on the first end portion 9144. An opening 9145 is provided on the second end portion 9146. Both the threaded hole 9143 and the opening 9145 communicate with the inner cavity of the outer peripheral portion 9142.

[0076] Please continue to compare. Figure 11 and Figure 14 The guide member 912 enters the inner cavity of the knob 914 through the threaded hole 9143 at the first end 9144. The thread on the surface of the guide shaft 9122 of the guide member 912 engages with the internal thread of the threaded hole 9143. When the knob 914 is rotated, the knob 914 moves axially along the guide shaft 9122. When the knob 914 moves axially proximally until the first end 9144 of the knob 914 abuts against the limiting member 9126, the axial movement of the knob 914 proximally is blocked by the limiting member 9126 to prevent the knob 914 from sliding out of the guide member 912.

[0077] When knob 914 is in Figure 11 In the indicated state (loaded state), i.e., when the threaded hole 9143 of the first end 9144 of the knob 914 is engaged with the threaded part at the farthest end of the guide shaft 9122, the distance between the end face of the first end 9144 and the limiting member 9126 is L. In one embodiment, L is not greater than the axial length of the film-coated support in the loaded state, so as to ensure that the guide head 10 and the sheath core tube 20 have sufficient retraction space and that the overall length of the conveyor 100 is not too large.

[0078] In one embodiment, such as Figure 14 As shown, the inner surface of the outer peripheral portion 9142 of the knob 914 is a smooth surface. It can be understood that the inner diameter of the outer peripheral portion 9142 is larger than the outer diameter of the limiting member 9126 to ensure that the limiting member 9126 will not interfere with the axial displacement of the knob 914 along the guide shaft 9122.

[0079] In one embodiment, such as Figure 15 As shown, a thread 9141 is formed on the inner surface of the outer peripheral portion 9142 of the knob 914. Correspondingly, a thread 9141 is formed on the outer peripheral surface of the limiting member 9126, as shown... Figure 13As shown, the thread 9141 of the knob 914 engages with the thread of the limiting member 9126. This ensures that during the axial displacement of the knob 914 along the guide shaft 9122, the thread of the guide shaft 9122 engages with the thread of the threaded hole 9143, and simultaneously, the thread 9141 of the knob 914 engages with the thread of the limiting member 9126, thus improving the stability of the axial displacement of the knob 914 along the guide shaft 9122.

[0080] The fixing member 920 is used to fix it to the sheath core tube 20 so that when the fixing member 920 moves axially, it drives the sheath core tube 20 to move axially.

[0081] Please see Figure 16 In one embodiment, the fastener 920 includes a sheath core fixing portion 922 and a knob fixing portion 924 connected to the proximal end of the sheath core fixing portion 922. The sheath core tube 20 is fixedly connected to the sheath core fixing portion 922, and the knob 914 is fixedly connected to the knob fixing portion 924.

[0082] Specifically, in one embodiment, the sheath core fixing portion 922 is cylindrical. A fixing hole 9222 extends axially from one end of the sheath core fixing portion 922 to the other end, and a through hole extends axially from one end of the knob fixing portion 924 to the other end. The through hole of the knob fixing portion 924 and the fixing hole 9222 are connected. The proximal end of the sheath core tube 20 enters the fixing hole 9222 through the through hole of the knob fixing portion 924 and is fixedly connected to the sheath core fixing portion 922. The method of fixing is not limited; for example, it can be adhesive bonding, interference fit, etc.

[0083] The knob fixing part 924 has a T-shaped cross-section, including a radial extension 9242 and an axial extension 9244 connected to the proximal end of the radial extension 9242. Both the radial extension 9242 and the axial extension 9244 are cylindrical structures, with the outer diameter of the radial extension 9242 being larger than the outer diameter of the axial extension 9244, thus forming a T-shaped cross-section. The end of the axial extension 9244 furthest from the radial extension 9242 (the proximal end) is connected to the sheath core fixing part 922, forming an annular groove 926 between the knob fixing part 924 and the sheath core fixing part 922.

[0084] Please refer to the following: Figure 17 The radial extension 9242 of the knob fixing part 924 extends into the inner cavity of the knob 914, and the second end 9146 of the knob 914 is embedded and fixed in the annular groove 926, so that the knob 914 is fixedly connected to the fixing part 920, so that when the knob 914 moves axially, it drives the fixing part 914 to move axially, thereby driving the sheath core tube 20 and the guide head 10 fixedly connected to the sheath core tube 20 to move axially.

[0085] It is understood that, in other embodiments, the structure of the fastener 920 is not limited to... Figure 16 The structure shown can also be other structures that can be fixedly connected to both the sheath core tube 20 and the knob 914 simultaneously, so as to drive the sheath core tube 20 to move axially under the drive of the knob 914. For example, the fixing member 920 is a cylindrical structure, the sheath core tube 20 extends into the interior of the fixing member 920 and is fixedly connected to the fixing member 920, and the distal end of the fixing member 920 is directly fixedly connected to the second end 9146 of the knob 914. The fixing connection method includes, but is not limited to, gluing, welding, etc.

[0086] The method of using conveyor 100 is as follows:

[0087] (1) First, load the covered stent (main stent) so that the covered stent is housed in the annular accommodating cavity formed by the outer sheath tube 40 and the core tube 20;

[0088] (2) The delivery device 100 loaded with the covered stent is delivered to the pre-designated location of the vascular lesion, and the covered stent is released by operating the movable handle 60 so that the covered stent is fully opened and adheres to the vascular wall.

[0089] (3) Please refer to Figure 18 Rotate knob 914 to move knob 914 axially proximally, thereby moving the fixing member 920 axially proximally. The guide head 10 and sheath core tube 20 move axially proximally together with the fixing member 920. Then, push the pre-placed guide wire 200 distally. The distal end of the pre-placed guide wire 200 follows the groove ( Figure 18 (Not shown) An inclined surface extends out and is located at the distal end of the guide head 10. The operator stops retracting the guide wire 200 after observing its position on the medical image.

[0090] (4) Under imaging conditions, push the pre-placed guidewire 200 further into the pre-designated vascular branch to prepare for subsequent clinical operations on the branch vascular branch.

[0091] Please see Figure 19 In another embodiment, the guide 912 includes a guide shaft 9122, a positioning shaft 9124, and a limiting member 9126. Figure 12 The illustrated embodiment differs in that the guide shaft 9122 has no threads or toothed structures on its surface, and the positioning shaft 9124 is located at the proximal end of the guide shaft 9122. A limiting member 9126 is sleeved on the positioning shaft 9124 and is adjacent to or abuts against the distal end of the guide shaft 9122. Alternatively, the limiting member 9126 is sleeved on the guide shaft 9122, and the limiting member 9126 is adjacent to or abuts against the proximal end of the positioning shaft 9124.

[0092] Please see Figure 20In one embodiment, the knob 914 includes an outer peripheral portion 9142, a first end portion 9144, and a second end portion 9146. The outer peripheral portion 9142 forms a hollow cylinder, and the first end portion 9144 and the second end portion 9146 are located at the distal and proximal ends of the outer peripheral portion 9142, respectively. An opening is formed on the first end portion 9144. An opening 9145 is formed on the second end portion 9146. Both the opening on the first end portion 9144 and the opening 9145 on the second end portion 9146 communicate with the inner cavity of the outer peripheral portion 9142. Furthermore, neither the opening on the first end portion 9144 nor the opening 9145 on the second end portion 9146 is a threaded hole, but rather a hole with a smooth inner wall. The inner wall of the outer peripheral portion 9142 has a threaded or toothed structure.

[0093] Please see Figure 21 In one embodiment, the fastener 920 includes a sheath core fixing portion 922 and a knob fixing portion 924 connected to the proximal end of the sheath core fixing portion 922. The structure of the sheath core fixing portion 922 is similar to... Figure 16 The structure of the illustrated embodiment is the same, and the fixing method of the sheath core tube 20 and the sheath core fixing part 922 is also the same. Further details will not be provided here. Figure 16 Unlike the illustrated embodiment, in this embodiment, the axial extension 9244 has a larger length. Furthermore, the outer circumferential surface of the radial extension 9242 is formed with threads or teeth.

[0094] Please see Figure 22 In the loaded state, the distal end of the positioning shaft 9124 of the guide 912 is connected to the proximal end of the second connecting portion 816, and the limiting member 9126 forms an annular groove with the second connecting portion 816. The first end 9144 of the knob 914 is received in the annular groove. The knob fixing portion 924 of the fixing member 920 extends into the inner cavity of the knob 914, and the threaded or toothed structure on the outer peripheral surface of the radial extension 9242 engages with the threaded or toothed structure on the inner wall of the outer peripheral portion 9142. The distal end face of the radial extension 9242 abuts against the proximal end face of the limiting member 9126, or the two end faces are close to each other.

[0095] Please see Figure 23 Rotate the knob 914, and the fixing part 920 will move axially towards the proximal end along the trajectory of the thread 9141 of the knob 914, thereby driving the sheath core tube 20 and the guide head 10 to move axially towards the proximal end as a whole.

[0096] The aforementioned delivery device 100 includes a sheath core adjustment device 90. Since the distal end of the sheath core tube 20 is fixedly connected to the guide head 10, and the proximal end of the sheath core tube 20 is fixedly connected to the sheath core adjustment device 90, when the sheath core adjustment device 90 slides axially towards the proximal end along the guide rod 70, it drives the sheath core tube 20 and the guide head 10 to slide axially towards the proximal end, so as to avoid the interference of the sheath core tube 20 and the guide head 10 (i.e., the distal component) on subsequent operations, which is conducive to the normal progress of clinical operations.

[0097] Please see Figure 24 In one embodiment, the delivery device 100 further includes a rear-release anchor 110, which is sleeved on the sheath core tube 20 and used to anchor one end of the film-coated support to achieve rear release.

[0098] Because the sheath core adjustment device 90 of the conveyor 100 can drive the sheath core tube 20 and the guide head 10 to slide axially towards the proximal end, the rear release anchor 110 can retract along with the sheath core tube 20. Therefore, the conveyor 100 can realize the rear release of the film-covered stent, and after the film-covered stent is released, the rear release anchor 110 does not affect subsequent operations.

[0099] When it is necessary to implant the main scaffold and branch scaffolds, after the main scaffold is delivered and released using the aforementioned delivery device 100, the distal components such as the sheath core tube 20 and guide head 10 are withdrawn through the sheath core adjustment device 90, and the pre-placed guide wire 200 pre-loaded in the pre-placed guide wire device 80 is continued to be pushed. There is no need to implant the guide wire from another entrance, which is convenient to operate and causes less trauma to the organism.

[0100] The pre-placed guidewire device 80 enables the placement of the guidewire 200 before implantation and facilitates the push-out of the guidewire 200 after the release of the covered stent (main stent). It is understood that in other embodiments, the pre-placed guidewire device 80 may be omitted, and an opening may be provided on the outer sheath 40 through which the guidewire 200 enters the outer sheath 40 or the support tube 30.

[0101] Alternatively, in other embodiments, the pre-placed guidewire device 80 is sleeved on the outer sheath tube 40 and located at the distal end of the fixed handle 50. The outer sheath tube 40 passes through the first connecting tube 830 and the second connecting tube 840 of the pre-placed guidewire device 80.

[0102] It should be noted that the proximal connection between the sheath core adjusting device 90 and the guide rod 70, as described above, allows the sheath core adjusting device 90 to slide axially relative to the guide rod 70. The sheath core adjusting device 90 and the guide rod 70 can be directly or indirectly connected. For example, when a pre-set guide wire device 80 is included, the sheath core adjusting device 90 and the guide rod 70 are indirectly connected through the pre-set guide wire device 80. When the pre-set guide wire device 80 is omitted, the sheath core adjusting device 90 and the guide rod 70 are directly connected.

[0103] The sheath core adjusting device 90 can slide axially relative to the guide rod 70, which can be achieved by a portion of the sheath core adjusting device 90 sliding axially relative to the guide rod 90, for example... Figure 18 In the illustrated embodiment, the fixing member 920 and the knob 914 of the sheath core adjusting device 90 are axially slidable relative to the guide rod 70. For example, Figure 23In the embodiment shown, the fixing member 920 of the sheath core adjusting device 90 can slide axially relative to the guide rod 70 or the second connecting part 816.

[0104] In another embodiment, the sheath core adjusting device 90 is movably connected to the proximal end of the guide rod 70, allowing the sheath core adjusting device 90 to slide axially along the guide rod 70. Alternatively, the sheath core adjusting device 90 as a whole can slide axially relative to the guide rod 70. For example, in one embodiment, the sheath core adjusting device 90 is a hollow cylindrical structure. The axial length of the second connecting portion 816 of the pre-placed guide wire device 80 is extended, and the outer surface of the second connecting portion 816 is threaded. The inner wall of the sheath core adjusting device 90 is also threaded. The two are engaged by the threads, allowing the sheath core adjusting device 90 to slide axially along the second connecting portion 816. The sheath core tube 20 and the hollow cylindrical sheath core adjusting device 90 can be fixed using methods known to those skilled in the art. For example, the sheath core adjusting device 90 has a through hole extending from the surface to the inner cavity. One end of the connector is connected to the sheath core tube 20, and the other end extends out of the through hole and connects to the inner wall of the sheath core adjusting device 90, thereby fixing the sheath core tube 20 and the sheath core adjusting device 90 together. When the pre-set guide wire device 80 is omitted, the sheath core adjustment device 90 and the guide rod 70 are connected by threads, allowing the sheath core adjustment device 90 to slide axially relative to the guide rod 70.

[0105] It should also be noted that in other embodiments, the support tube 30 can be omitted. When the support tube 30 is omitted, the pre-placed guide wire 200 directly enters the outer sheath tube 40 after exiting the pre-placed guide wire device 80. The support tube 30 serves several purposes: firstly, it supports the outer sheath tube 40, preventing it from bending; secondly, it guides the pre-placed guide wire 200, making it easier to push; and thirdly, it provides the pre-placed guide wire 200 with an independent channel, preventing it from interfering with the release of the covered stent.

[0106] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0107] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A conveyor, characterized in that, It includes a guide head, a sheath core tube, a guide rod, and a sheath core adjustment device. The sheath core adjustment device is movably connected to the proximal end of the guide rod, allowing the sheath core adjustment device to slide axially relative to the guide rod. The sheath core tube passes through the guide rod, and the distal end of the sheath core tube is fixedly connected to the guide head. The proximal end of the sheath core tube is fixedly connected to the sheath core adjustment device. The conveyor also includes a pre-positioned wire guide device, which is provided with a wire guide tube or a wire guide channel; The pre-placed guide wire device is connected to the proximal end of the guide rod; or, the conveyor further includes an outer sheath tube, which is slidably sleeved on the sheath core tube along the axial direction, and the proximal end of the outer sheath tube is received in the guide rod, and the pre-placed guide wire device is sleeved on the outer sheath tube; The conveyor includes at least two guide wires, one of which is used to guide the conveyor, and at least one of which is partially housed in the guide wire tube or guide wire channel of the pre-positioned guide wire device.

2. The conveyor according to claim 1, characterized in that, The sheath core adjustment device includes a driving member and a fixing member connected to the proximal end of the driving member. The proximal end of the sheath core tube is fixedly connected to the fixing member. The driving member is movably connected to the proximal end of the guide rod, allowing the sheath core adjustment device to slide axially relative to the guide rod.

3. The conveyor according to claim 2, characterized in that, The driving component includes a guide and a knob. The distal end of the guide is connected to the guide rod, the knob is sleeved on the guide, and the proximal end of the knob is connected to the fixing component. The knob can slide axially along the guide to drive the fixing component to slide axially.

4. The conveyor according to claim 3, characterized in that, Both the guide and the knob are provided with threads. The guide and the knob are engaged by the threads, allowing the knob to slide axially along the guide, which in turn drives the fixing member to slide axially.

5. The conveyor according to claim 4, characterized in that, The guide includes a guide shaft with threads on its surface. The knob includes an outer periphery and a first end and a second end connected to the two ends of the outer periphery, respectively. The first end has a threaded hole, and the thread engages with the threaded hole to allow the knob to slide axially along the guide shaft.

6. The conveyor according to claim 5, characterized in that, The guide also includes a limiting member, which is connected to the guide shaft. The outer surface of the limiting member is threaded, and the inner surface of the outer periphery is threaded. The thread on the limiting member engages with the thread on the outer periphery.

7. The conveyor according to claim 3, characterized in that, The guide includes a guide shaft, the knob has an inner cavity, the knob is sleeved on the guide shaft, the inner wall of the knob is provided with threads, the fixing member includes a sheath core fixing part and a knob fixing part connected to the distal end of the sheath core fixing part, the sheath core fixing part is fixedly connected to the sheath core tube, the outer surface of the knob fixing part is formed with threads, the knob fixing part is movably received in the inner cavity of the knob, and the threads on the knob and the threads on the knob fixing part cooperate so that when the knob is in the rotating state, the fixing member can slide axially.

8. The conveyor according to claim 1, characterized in that, The guide head has a groove extending from the outer surface of the guide head inward. The groove has a bottom surface and a sidewall surrounding the bottom surface. The sidewall includes a distal side surface. The bottom surface and the distal side surface smoothly transition to form a slope.

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