Restorable blood vessel occluder

Abstract

The invention provides a restorable blood vessel plugging device which comprises a handle, a sheath tube, a puncture guide wire, a positioning guide wire and a push rod, the sheath tube is assembled at the far end of the handle, and a plugging plug corresponding to the push rod is arranged at the far end of the sheath tube; a driving assembly is arranged in the handle and comprises a duplex rack, a gear set, a transmission part and a rotation stopping table, the duplex rack is assembled in the handle in a sliding mode, a directional seat corresponding to the positioning guide wire is arranged on the duplex rack, and the positioning guide wire is assembled on the directional seat through the rotation stopping table so that the annular hook can be formed in the set direction after stretching out. The two reset holes are additionally formed in the shell of the handle, after the guide wire is knocked out and released, the drive rod is unlocked through the reset rod, the drive rod and the transmission piece are reset under the shifting of external force, and the shackle at the far end of the positioning guide wire can be stored and assembled again, so that the use frequency of the plugging device is increased; the plugging device is optimized from an unrecoverable process to a completely recoverable process, so that the reliability of a product is improved, and the detection consumption cost is also reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a recoverable blood vessel occluder. Background Art

[0002] Complications at the puncture site of the vascular access are a major cause of complications after the entire catheter intervention procedure. Currently, manual compression (MC) is a common method to achieve hemostasis at the arterial puncture site. However, due to the need to interrupt anticoagulation, prolonged bed rest, patient discomfort, and especially the need for long-term compression for puncture sites larger than 8F, manual compression can no longer fully meet the needs of doctors and patients.

[0003] Vascular occlusion devices are currently commonly used medical devices for hemostasis at puncture sites. They can improve patient comfort, reduce medical staff resources, shorten hemostasis time, as well as the time required to get out of bed and be discharged from the hospital, and reduce complications after interventional surgery. The use of vascular occlusion devices requires that occluding materials be placed at the site of vascular puncture to block the vascular puncture. The accuracy of the release position of the occluding material will seriously affect the effect of occlusion and hemostasis. The current storage of the finger guide wire ring of the vascular occluder is in the delivery tube of the product. Once the product is assembled, the position of the finger guide wire ring in the delivery tube cannot be detected, which in turn affects the release position of the finger guide wire ring; at the same time, once the finger guide wire ring is released, the process is irreversible and the product is scrapped and invalid.

[0004] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art. The present invention provides a recoverable vascular occluder.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A restorable blood vessel occluder, comprising a handle, a sheath, a puncture guidewire, a positioning guidewire and a push rod, wherein the sheath is assembled at the distal end of the handle, the positioning guidewire and the push rod are inserted into the inner cavity of the sheath in parallel, and the distal end of the sheath is provided with a sealing plug corresponding to the push rod; a driving assembly is arranged in the handle, the driving assembly comprises a double rack, a gear set, a transmission member and a stopper, the double rack is slidably assembled inside the handle, a gear set is arranged at the proximal end of the double rack, a sliding rack is correspondingly engaged with one of the gears of the gear set and is slidably assembled in the double rack, the transmission member is correspondingly engaged with another gear of the gear set and is slidably assembled in the double rack or inside the handle, the end of the transmission member abuts against the driving rod, and the distal end of the driving rod extends out of the handle;

[0008] The distal end of the positioning guide wire is made of elastic material and is heat-formed into an annular hook at the distal end. An directional seat corresponding to the positioning guide wire is provided on the double-linked rack. The positioning guide wire is assembled on the directional seat through a stop table so that the annular hook can be formed along a set direction after being extended.

[0009] Preferably, the inner wall of the handle is provided with two clamping platforms spaced apart in the pushing direction, and the side of the driving rod is provided with wedge-shaped clamping teeth corresponding to the clamping platforms and with the smaller end pointing to the proximal end;

[0010] The driving rod is made of elastic material, and a first reset hole corresponding to the middle of the driving rod and located on one side of the card platform is provided in the middle of the handle. In response to the reset column extending through the first reset hole, the driving rod is deformed to the side away from the card platform to release the clamping lock, so that it slides toward the proximal end of the handle and resets under the action of external force;

[0011] A second reset hole corresponding to the transmission member is provided at the proximal end of the handle. The second reset hole is a bar-shaped hole extending along the pushing direction. In response to a reset column extending through the second reset hole, the transmission member is driven to slide toward the proximal end of the handle and reset.

[0012] Preferably, the transmission member is provided with a strip-shaped hole or a strip-shaped notch corresponding to the second reset hole, and a limiting hook corresponding to the reset column is provided in the strip-shaped hole or the strip-shaped notch.

[0013] Preferably, the gear set comprises a large gear and a small gear of different diameters, wherein the sliding rack meshes with the large gear, and the side of the transmission member is provided with a driving tooth corresponding to the small gear and extending along the pushing direction.

[0014] Preferably, after the distal end of the driving rod extends out of the handle, a collar corresponding to the sheath is provided, and a positioning column is provided on the other side of the collar relative to the driving rod, and the positioning column is slidably inserted into the distal end of the handle.

[0015] Preferably, a notch corresponding to a button is provided in the middle of the handle, one end of the button extends into the handle from the notch and is hinged through a hinge shaft, a half gear is hinged on the side of the button corresponding to the double rack, and a driving tooth corresponding to the half gear meshing is provided on the double rack.

[0016] Preferably, the orientation seat includes two positioning plates spaced apart, the anti-rotation platform is fixed between the two positioning plates, the positioning plate located on the distal side is provided with a positioning groove corresponding to the setting direction of the annular hook, and the anti-rotation platform is provided with an insert plate corresponding to the positioning groove.

[0017] Preferably, the anti-rotation platform is a columnar or frustum-shaped structure, wherein a through hole corresponding to the positioning guide wire is provided in the middle thereof, and the plug plate extends along the busbar of the anti-rotation platform.

[0018] Preferably, the positioning plate located on the distal side is slidably assembled on the sliding rack, the distal end of the anti-rotation platform is inserted into the positioning plate located on the distal side, and a stop flange corresponding to the positioning plate on the proximal side is provided at the proximal end of the anti-rotation platform.

[0019] Preferably, there are two positioning grooves, and the two positioning grooves are distributed at 90 degrees.

[0020] Beneficial effects: Two reset holes are added to the handle shell. When the guide wire is released, the drive rod is unlocked in turn through the reset rod. The drive rod and the transmission part are reset under external force, and the hook ring at the distal end of the positioning guide wire can be reassembled, thereby increasing the number of uses of the occluding device. The occluder is optimized from an irreversible process to a fully recoverable process, which increases the reliability of the product and reduces the cost of detection consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0022] Figure 1 This is a front view of the occluder in a specific embodiment provided by the present invention;

[0023] Figure 2 A rear view of the occluder in a specific embodiment provided by the present invention;

[0024] Figure 3 An assembly diagram of the internal structure of the occluder in a specific embodiment provided by the present invention;

[0025] Figure 4 A schematic diagram of the internal structure of the sealing plug in the pushed-out state in the specific embodiment provided by the present invention;

[0026] Figure 5 It is a schematic diagram of the assembly of the driving assembly in the specific embodiment provided by the present invention;

[0027] Figure 6 A schematic structural diagram of a double rack in a specific embodiment provided by the present invention;

[0028] Figure 7 A schematic structural diagram of a sliding rack in a specific embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the sheath tube in a specific embodiment provided by the present invention;

[0030] Fig. 9 A schematic diagram of the structure of a button in a specific embodiment provided by the present invention;

[0031] Fig.10 A schematic diagram of the structure of a transmission member in a specific embodiment provided by the present invention;

[0032] Fig.11 A schematic diagram of the structure of a gear set in a specific embodiment of the present invention;

[0033] Fig.12 A simplified cross-sectional view of an exchange connector in a specific embodiment provided by the present invention;

[0034] Fig.13 A schematic structural diagram of a stop turntable in a specific embodiment provided by the present invention;

[0035] Fig.14 A schematic structural diagram of a driving rod in a specific embodiment provided by the present invention;

[0036] Fig.15 A reference diagram of the insertion state of the puncture guide wire in the specific embodiment provided by the present invention;

[0037] Fig.16 A reference diagram of the driving rod pushing state in a specific embodiment provided by the present invention;

[0038] Fig.17 This is a reference diagram of the sealing plug being pushed out in the specific embodiment provided by the present invention.

[0039] In the figure: 1. handle; 2. sheath; 3. exchange connector; 4. drive rod; 5. button; 6. second reset hole; 7. double rack; 8. gear set; 9. sliding rack; 10. transmission member; 11. observation window; 12. half gear; 13. display member; 14. spring; 15. anti-rotation table; 16. positioning plate; 17. first reset hole; 18. positioning guide wire; 19. push rod; 20. positioning groove; 21. skin; 22. puncture guide wire; 23. blood return port; 24. blood vessel;

[0040] 401, sleeve ring; 402, wedge-shaped engaging teeth; 801, large gear; 802, small gear; 101, limit hook; 151, plug plate; 152, stop flange; 181, annular hook. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0042] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0044] It should be noted that the use of the vascular occlusion device requires that the occluding material be placed at the site of the vascular puncture to occlude the vascular puncture. In the following embodiments, the end away from the operator is the distal end, and the end close to the operator is the proximal end.

[0045] like Figure 1 As shown, the vascular occluder includes a handle 1, a sheath tube 2, a positioning guide wire 18 and a push rod 19. The handle 1 is made of injection molding material, and the outer surface is designed to be a streamlined design suitable for grasping. The handle 1 includes two shells that are interlocked with each other. The two shells are connected in a detachable manner to form the handle 1. The two shells are interference-fitted through mounting holes and columns. A driving component is assembled inside the handle 1. The driving component is used to drive the positioning guide wire 18 and the push rod 19 to move. The sheath tube 2 is slidably assembled at the distal end of the handle 1. The sheath tube 2 is a hollow structure for the positioning guide wire 18 and the push rod 19 to move. The wire 18 and the pushing rod 19 are interspersed and slide independently. An installation notch is provided in the middle of the handle 1, and a button 5 is provided in the notch. The button 5 corresponds to driving the internal driving component to move along the pushing direction. A driving rod 4 corresponding to the driving component is also provided in the handle 1. The driving rod 4 is slidably assembled in the handle 1 and slidably assembled along the pushing direction. The distal end of the driving rod 4 extends out of the handle 1, so as to drive the internal driving component to operate, and under the drive of the driving component, the positioning guide wire 18 is pushed forward out of the sheath 2, and the outside of the sheath 2 is provided with scale lines.

[0046] In an optional embodiment, a sealing plug is provided at the distal end of the sheath 2, a blood return port 23 is provided at a position corresponding to the proximal end of the sealing plug of the sheath 2, a guide wire exchange port corresponding to the connecting sheath 2 is provided at the handle 1, an exchange connector 3 corresponding to the connecting sheath 2 is provided in the handle 1, a connecting tube extends from the side of the exchange connector 3 to form a guide wire exchange port, so that the puncture guide wire 22 can be inserted from the blood return port 23 and pass through the guide wire exchange port of the exchange connector 3, after the puncture guide wire 22 is pulled out, bleeding is carried out through the guide wire exchange port, and the specific position of the distal end of the organ is judged according to the amount of bleeding, a strip hole corresponding to the connecting tube is provided on the side of the handle 1, so that the connecting tube can be extended and make way for the pushing and withdrawal of the connecting tube, and the extended part of the connecting tube can be connected to other pipelines after the puncture guide wire 22 is withdrawn.

[0047] like Figure 2 As shown, the current vascular occluder stores the finger guide wire ring in the product's delivery tube. Once the product is assembled, the finger guide wire ring is located in the delivery tube and cannot be detected, which affects the release position of the finger guide wire ring. At the same time, once the finger guide wire ring is released, the process is irreversible and the product is scrapped and invalid. The vascular occluder provided in this embodiment has a reset function. Specifically, a first reset hole 17 corresponding to the drive rod 4 and a second reset hole 6 corresponding to the transmission member 10 are provided on the side of the handle 1. The reset column can be a rubber or metal rod. After passing through the first reset hole 17, the reset column can deform the drive rod 4 to release the lock of the wedge-shaped engaging teeth 402 and the clamping column. In addition, the second reset hole 6 is a strip, and the transmission member 10 is reset by toggling, so that the vascular occluder can be restored and can be used again. The reset hole diameter is about 1-1.5mm.

[0048] like Figure 3 As shown, the driving assembly includes a double rack 7, a gear set 8, a transmission member 10 and a stop table 15, wherein the double rack 7 is mainly used to install the gear set 8, the sliding rack 9 and the gear set 8, and a sliding groove corresponding to the sliding rack 9 is provided inside the double rack 7, and the transmission member 10 and the sliding rack 9 are linked by the linkage of the gear set 8, wherein the sliding rack 9 is connected to the proximal end of the positioning guide wire 18 through a directional seat, so that in the process of the driving rod 4 pushing the transmission member 10, the sliding rack 9 is driven to slide through the gear set 8, thereby pushing the positioning guide wire 18 forward, and winding it into a hook shape after the distal end of the positioning guide wire 18 is extended.

[0049] The main size specifications of the current occluder are 5F / 6F / 7F. Once the vascular puncture opening is enlarged to 8F, the finger guide wire at the front end of the vascular occluder will find it difficult to hook the puncture opening of the blood vessel 24, which makes it difficult to judge the accuracy of the release position of the occluding material. In this embodiment, the direction of the hook body of the guide wire ring is set by the turntable 15, which increases the feedback range of the finger guide wire ring and can hook the 8F puncture opening.

[0050] The distal end of the positioning guide wire 18 is thermoformed into a hook shape, and the proximal end extends into the handle 1. A spring 14 is provided at the proximal end of the positioning guide wire 18. The spring 14 correspondingly contacts between the exchange connector 3 and the display member 13 and is fixed to the two, so that the sliding rack 9 and the exchange connector 3 are buffer-connected, and the exchange connector 3 can be driven during the withdrawal of the sliding rack 9.

[0051] like Figure 4 As shown, the transmission member 10 is driven by the driving rod 4, so that the positioning guide wire 18 is pushed forward, and after leaving the pushing channel, it automatically bends and winds at least one circle, thereby forming a hook-shaped structure. When the transmission member 10 moves toward the proximal end, the driving teeth drive the small gear 802 to rotate and drive the large gear 801 to rotate synchronously, thereby pushing the sliding rack 9 toward the distal end, and then pushing the proximal end of the positioning guide wire 18, so that the distal end of the positioning guide wire 18 extends out of the sheath 2.

[0052] like Figure 5 As shown, the double rack 7 of the driving assembly is groove-shaped, and a sliding groove corresponding to the sliding rack 9 and a driving tooth parallel to the sliding rack 9 are provided inside it. A button 5 is also provided at the notch of the handle 1, and a half gear 12 with meshing driving teeth is hinged in the middle of the button 5. The half gear 12 is coaxially distributed with the axial hinge of the button 5, so that when the button 5 is driven, the half gear 12 drives the driving teeth to move, specifically slides toward the proximal end, thereby driving the positioning guide wire 18 to withdraw, so that the hook-shaped structure at the distal end of the positioning guide wire 18 enters the pushing channel to form a strip.

[0053] In this embodiment, in order to reduce the space occupied by the button 5, the half gear 12 is extended with a connecting end, and the connecting end is hinged to the middle part of the button 5 or the end away from the hinge point through a hinge shaft, so that during the pressing process, a torque is generated on the driving teeth of the linkage rack with the hinge point between the connecting end of the half gear 12 and the button 5 as the center of the circle; or an arc-shaped protrusion concentric with the half gear 12 is provided on at least one side of the half gear 12, and an arc-shaped groove corresponding to the arc-shaped protrusion is provided on the inner side of the handle 1, so as to limit the driving trajectory of the half gear 12.

[0054] like Figure 6 As shown, the proximal end of the linkage rack corresponds to the rotationally connected gear set 8, and the sliding rack 9 is located inside the linkage rack at the lower limit of the meshing of the large gear 801. Accordingly, a sliding groove corresponding to the linkage rack is provided inside the handle 1.

[0055] like Figure 7As shown, the proximal end of the sliding rack 9 is provided with driving teeth corresponding to the large gear 801, and an orientation seat is provided in the middle of the sliding rack 9, and the orientation seat is used to fix the anti-rotation table 15. Specifically, the orientation seat includes two positioning plates 16, wherein the positioning plate 16 on the proximal side is fixed to the sliding rack 9, and the positioning plate 16 on the distal side is slidably assembled. After the anti-rotation table 15 is installed, the positioning plate 16 on the distal side slides toward the proximal side along the pushing direction, so as to confine the anti-rotation table 15 between the two positioning plates 16, and then the positioning plate 16 on the distal side is fixed by glue or screws.

[0056] like Figure 8 As shown, the positioning guide wire 18 is fixedly connected to the display component 13, and a display component 13 located at the proximal end of the spring 14 and fixedly connected is provided on the positioning guide wire 18 between the directional seat and the exchange connector 3, and the display component 13 is provided with multi-color markings spaced apart along the pushing direction, and an observation window 11 corresponding to the display component 13 is provided on the handle 1.

[0057] Furthermore, the inside of the sheath 2 is provided with push channels which independently correspond to the puncture guide wire 22, the positioning guide wire 18 and the push rod 19, wherein the push channel of the positioning guide wire 18 extends to the distal end of the sheath 2, and the side of the sealing plug is provided with a strip-shaped give-way groove corresponding to the push channel of the positioning guide wire 18.

[0058] In an optional embodiment, there is a certain distance between the push channel of the puncture guide wire 22 and the sealing plug, and the push channel of the push rod 19 extends between the push channel of the puncture guide wire 22 and the sealing plug. The distal end of the push rod 19 is provided with a push disk, and the cross section of the push disk is adapted to the cross section of the sealing plug. The push disk and the push rod 19 are integrally formed or glued or hot-melt fixed. The push disk is connected to the distal end of the push rod 19 by glue, and the proximal end of the push rod 19 is designed as a double right angle. The positioning guide wire 18 is a nickel-titanium wire, and the distal end is a circular ring after heat treatment. The nickel-titanium wire rod body is received in the corresponding push channel. A developing ring or a marking ring is also provided on the sheath tube 2, and the sealing plug and the sheath tube 2 are interference fit.

[0059] like Fig. 9 As shown, a hinge shaft is provided at one end of the button 5 extending into the handle 1, a corresponding hinge station is provided inside the handle 1, a connecting end is extended from the half gear 12, and the connecting end is hinged to the middle part of the button 5 or the end away from the hinge point through the hinge shaft, an anti-slip groove is provided on the outside of the button 5, an arc-shaped protrusion concentric with the half gear 12 is provided on at least one side of the half gear 12, and an arc-shaped groove corresponding to the arc-shaped protrusion is provided on the inside of the handle 1.

[0060] The proximal end of the push rod 19 is fixed to the inner wall of the handle 1, or a positioning column corresponding to the push rod 19 is provided in the handle 1, and the proximal end of the push rod 19 is stopped on the positioning column by bending. Since the sheath tube 2 and the handle 1 are slidably assembled, when the button 5 is pressed to retract the sliding rack 9, the display part 13 drives the exchange connector 3 through the spring 14, and the exchange connector 3 drives the sheath tube 2 to move toward the proximal end. Under the stopping of the positioning column, the push rod 19 is displaced relative to the sheath tube 2, thereby pushing out the sealing plug.

[0061] like Fig.10 As shown, the outer contour of the transmission member 10 is square, the transmission member 10 is made of elastic material, the transmission member 10 is slidably assembled on the double rack 7, and a slide groove corresponding to the transmission member 10 is provided on the inner wall of the handle 1 to limit the running trajectory of the transmission member 10 and ensure the reciprocating operation stability of the transmission member 10. A strip hole or a strip notch corresponding to the second reset hole 6 is provided on the transmission member 10, and a limiting hook 101 or a limiting notch corresponding to the reset column is provided in the strip hole or the strip notch. Two limiting hooks 101 are provided so as to be moved by the reset column.

[0062] The far end of the transmission member 10 is provided with a flat surface corresponding to the driving rod 4. A boss is extended from the side of the transmission member 10 close to the gear set 8, and the boss is provided with driving teeth corresponding to the meshing pinion 802. The sliding trajectory of the transmission member 10 is limited by the linkage rack and the slide groove inside the arm.

[0063] like Fig.11 As shown, the gear set 8 includes a large gear 801 and a small gear 802 of different diameters, the large gear 801 corresponds to the large gear 801 meshing with the sliding rack 9, and the small gear 802 corresponds to the driving teeth of the meshing transmission member 10. The large gear 801 and the small gear 802 have the same module, and the diameter difference is set according to the displacement ratio of the positioning guide wire 18 and the driving rod 4.

[0064] like Fig.12 As shown, the distal end of the exchange connector 3 corresponds to the fixed sheath 2, the proximal end of the exchange connector 3 is provided with two pushing holes corresponding to the pushing rod 19 and the positioning guide wire 18 respectively, and a strip hole corresponding to the exchange connector 3 is provided on the side of the handle 1.

[0065] like Fig.13 As shown, the stopper 15 is a columnar or frustum-shaped structure. Accordingly, the outer wall of the stopper 15 is preferably a conical surface, and a corresponding circular hole is provided on the distal positioning plate 16, and a through hole corresponding to the positioning guide wire 18 is provided in the middle thereof. The insert plate 151 extends along the busbar of the stopper 15, and a through hole corresponding to the positioning guide wire 18 is provided on the proximal positioning plate 16.

[0066] like Fig.14As shown, the distal end of the driving rod 4 extends out of the handle 1 and is slidably assembled with the handle 1. After the distal end of the driving rod 4 extends out of the handle 1, a ring 401 corresponding to the sheath 2 is provided. The diameter of the ring 401 is larger than the sheath 2. A positioning column is provided on the other side of the ring 401 relative to the driving rod 4. The positioning column is slidably inserted into the distal end of the handle 1, and a corresponding through hole is provided at the distal end of the handle 1 to avoid uneven force on the driving rod 4 when it is pushed toward the proximal end.

[0067] In an optional embodiment, a recoverable vascular occluder includes a handle 1, a sheath 2, a puncture guidewire 22, a positioning guidewire 18 and a pushing rod 19. The sheath 2 is arranged at the distal end of the handle 1. The positioning guidewire 18 and the pushing rod 19 are inserted into the inner cavity of the sheath 2 in parallel. The two can be pumped independently. The positioning guidewire 18 is made of elastic material and is heat-formed into a ring-shaped hook at its front end so that it automatically forms into a hook after extending out of the sheath 2. After withdrawing the sheath 2, it is formed into a strip by limiting the sheath 2 to facilitate pumping.

[0068] The sheath tube 2 is assembled at the distal end of the handle 1, and the positioning guide wire 18 and the pushing rod 19 are inserted into the inner cavity of the sheath tube 2 in parallel. The distal end of the sheath tube 2 is provided with a sealing plug corresponding to the pushing rod 19. The sealing plug is arranged at the distal end of the sheath tube 2, and the two are interference fit. The front end of the pushing rod 19 contacts the sealing plug, and the sealing plug can be pushed out to block the blood vessel 24. A driving component is arranged in the handle 1, and the driving component links the positioning guide wire 18 and the pushing rod 19. The driving component includes a double rack 7, a gear set 8, a transmission member 10 and a stop table 15. The double rack 7 is slidably assembled inside the handle 1. The double rack 7 is provided with a sliding station for accommodating the sliding rack 9, and a driving tooth arranged in the middle and parallel to the sliding rack 9. The driving tooth is used to The half gear 12 is meshed, so that the double rack 7 can be retracted under the drive of the handle 1. A hinged plate is provided at the proximal end of the double rack 7 to rotate and connect the gear set 8. The sliding rack 9 corresponds to one of the gears of the meshing gear set 8 and is slidably assembled in the double rack 7. Under the limitation of the gear set 8, the sliding trajectory of the sliding rack 9 is limited. The transmission member 10 corresponds to the other gear of the meshing gear set 8 and is slidably assembled in the double rack 7 or the handle 1. The end of the transmission member 10 abuts against the driving rod 4, and the distal end of the driving rod 4 extends out of the handle 1, thereby pushing the transmission member 10 to move proximally, and then transmitting through the gear set 8 to make the sliding rack 9 move distally and push the positioning guide wire 18 out of the sheath 2.

[0069] The distal end of the positioning guide wire 18 is made of elastic material and is heat-formed into an annular hook 181 at the distal end. The annular hook 181 is wrapped around at least once. An directional seat corresponding to the positioning guide wire 18 is provided on the double-linked rack 7 to fix the proximal end of the positioning guide wire 18. The positioning guide wire 18 is assembled on the directional seat through the stop table 15 so that the annular hook 181 can be formed along the set direction after being extended.

[0070] A blood return port 23 is provided at the proximal end of the sheath tube 2 corresponding to the closure plug, and a guide wire exchange port corresponding to the sheath tube 2 is provided at the handle 1. The blood return port 23 and the guide wire exchange port are connected to each other, so that the proximal blood return port 23 of the puncture guide wire 22 can be inserted into the sheath tube 2 and then extended from the guide wire exchange port. After the puncture guide wire 22 is withdrawn, the position of the blood return port 23 can be judged by the bleeding situation of the guide wire exchange port. The occluder and the puncture guide wire 22 can be used normally without an arterial sheath (long sheath). After the puncture guide wire 22 is withdrawn, the position of the distal blood return port 23 is judged whether it is inserted into the blood vessel 24 according to the blood outflow situation of the guide wire exchange port. There is no need to replace the long sheath and the short sheath during use, which improves the treatment efficiency and reduces the patient's physical damage.

[0071] The proximal end of the positioning guide wire 18 extends into the handle 1, and a driving assembly corresponding to the positioning guide wire 18 is provided in the handle 1. An exchange connector 3 corresponding to the connecting sheath 2 is provided in the handle 1, and a connecting hole corresponding to the sheath 2 is provided at the distal end of the exchange connector 3. The two can be glued and fixed by medical glue. A connecting tube extends from the side of the exchange connector 3 to form a guide wire exchange port, which is inclined toward the proximal side of the handle 1 to facilitate the insertion of the puncture guide wire 22. The connecting tube extends out of the handle 1, and a strip hole corresponding to the connecting tube is provided on the handle 1. Two pushing holes corresponding to the pushing rod 19 and the positioning guide wire 18 are provided at the proximal end of the exchange connector 3. The two pushing holes are independent of each other to ensure that there is no motion interference between the positioning guide wire 18 and the pushing rod during the pushing process.

[0072] The sheath 2 is provided with push channels independently corresponding to the puncture guide wire 22, the positioning guide wire 18 and the push rod 19. A plurality of perforations corresponding to the puncture guide wire 22, the positioning guide wire 18 and the push rod 19 can be provided inside the sheath 2 as push channels, or a plurality of flexible tubes or elastic tubes corresponding to the puncture guide wire 22, the positioning guide wire 18 and the push rod 19 can be provided inside the sheath 2 as push channels, so that independent pushing can be performed between the components.

[0073] Preferably, a flexible tube or an elastic tube is provided as a pushing channel, the pushing channel of the positioning guide wire 18 extends to the distal end of the sheath tube 2, the pushing channel of the puncture guide wire 22 extends to the blood return port 23, the blood return port 23 and the sealing plug have a certain distance, the pushing channel corresponding to the pushing rod 19 extends between the blood return port 23 and the sealing plug and contacts the sealing plug, and a strip-shaped make way groove is provided on the side of the sealing plug, and the make way groove is an arc-shaped groove corresponding to the pushing channel of the positioning guide wire 18.

[0074] The inner wall of the handle 1 is provided with two stoppers distributed at intervals in the pushing direction. The stoppers can prevent failure of the positioning guide wire 18 when it is in use. The side of the driving rod 4 is provided with wedge-shaped engaging teeth 402 corresponding to the stoppers, with the smaller end pointing to the proximal end. The driving rod 4 is made of elastic material. It deforms when passing through the stoppers and resets after passing. It is positioned by the contact of the wedge-shaped engaging teeth 402, thereby ensuring the internal stability of the blocking device when in use.

[0075] A first reset hole 17 corresponding to the middle of the driving rod 4 and located on one side of the card table is provided in the middle of the handle 1. The reset column is a metal or plastic rod. In response to the reset column being extended through the first reset hole 17, the driving rod 4 is deformed to the side away from the card table to release the clamping lock, so that it can slide to the proximal end of the handle 1 and reset under the action of external force; a second reset hole 6 corresponding to the transmission member 10 is provided at the proximal end of the handle 1. The second reset hole 6 is a strip hole extending along the pushing direction. In response to the reset column being extended through the second reset hole 6, the transmission member 10 is driven to slide to the proximal end of the handle 1 and reset, thereby cooperating with the button 5 to be lifted upward, so that the driving rod 4, the linkage rack and the sliding rack 9 can be reset in sequence. As the sliding rack 9 is reset, the positioning guide wire 18 can be driven to withdraw, so that the device returns to its initial state.

[0076] The transmission member 10 is provided with a strip hole or a strip notch corresponding to the second reset hole 6 , and a limit hook 101 corresponding to the reset column is provided in the strip hole or the strip notch. The limit hook 101 provides a fulcrum for the reset column to facilitate the reset of the transmission member 10 .

[0077] In an optional embodiment, the gear set 8 includes a large gear 801 and a small gear 802 of different diameters, which are fixed by the same main shaft and rotate synchronously, wherein the sliding rack 9 meshes with the large gear 801, and the side of the transmission member 10 is provided with driving teeth corresponding to the small gear 802 and extending along the pushing direction. The modulus and diameter are set according to the length of the sealing plug and the extended length of the positioning guide wire 18 to maintain the pushing accuracy.

[0078] In an optional embodiment, the inner wall of the handle 1 is provided with two stoppers distributed at intervals in the pushing direction, the stoppers can prevent failure of the positioning guide wire 18 when it is in use, and the side of the driving rod 4 is provided with wedge-shaped engaging teeth 402 corresponding to the stoppers, with the smaller end pointing to the proximal end. The driving rod 4 is made of elastic material, and is deformed when passing through the stoppers, and is reset after passing, and is positioned by the contact of the wedge-shaped engaging teeth 402, thereby ensuring the internal stability of the blocking device when in use.

[0079] After the distal end of the driving rod 4 extends out of the handle 1, a ring 401 corresponding to the sheath 2 is provided. The diameter of the ring 401 is larger than the sheath 2. A positioning column is provided on the other side of the ring 401 relative to the driving rod 4. The positioning column is slidably inserted into the distal end of the handle 1. A corresponding through hole is provided at the distal end of the handle 1 to avoid uneven force on the driving rod 4 when it is pushed toward the proximal end.

[0080] In an optional embodiment, a notch corresponding to the button 5 is provided in the middle of the handle 1, and the shape of the notch is adapted to the shape of the button 5. A first reset hole 17 is provided at the edge of the notch. One end of the button 5 extends into the handle 1 from the notch and is hinged through a hinge shaft. The button 5 is an injection molded part, and the hinge shaft and the button 5 are integrally formed. A half gear 12 is hinged on one side of the button 5 corresponding to the double rack 7, and a connecting end of the hinged button 5 is provided at the far end of the half gear 12. A driving tooth corresponding to the meshing half gear 12 is provided on the double rack 7, so that the half gear 12 is linked by pressing the button 5, and the driving tooth of the linked rack is driven by gear meshing.

[0081] In an optional embodiment, the orientation seat includes two positioning plates 16 that are spaced apart, and the anti-rotation table 15 is fixed between the two positioning plates 16, which is used to fix the anti-rotation table 15 and feedback and limit the angle of the annular hook 181 through the anti-rotation table 15. The positioning plate 16 located on the distal side is provided with a positioning groove 20 corresponding to the setting direction of the annular hook 181, and the anti-rotation table 15 is provided with an insert plate 151 corresponding to the positioning groove 20, and the positioning groove 20 and the annular hook 181 are set in the same direction.

[0082] Furthermore, the stopper 15 is a columnar or frustum-shaped structure, and a through hole corresponding to the positioning guide wire 18 is provided in the middle thereof, so that the positioning guide wire 18 can be fixed by glue, and the plug plate 151 extends along the busbar of the stopper 15; the stopper 15 can be made of plastic or rubber material. In order to facilitate the installation of the stopper 15, the stopper 15 is preferably a frustum-shaped structure, and the positioning plate 16 located at the distal side is slidably assembled on the sliding rack 9. The positioning plate 16 is provided with a mounting hole corresponding to the stopper 15. First, the stopper 15 is inserted Insert the mounting hole in the middle of the positioning plate 16 on the distal side, and dock the positioning groove 20 with the insert plate 151 to insert the distal end of the stop table 15 into the positioning plate 16 on the distal side, and a stopping flange 152 corresponding to the proximal positioning plate 16 is provided at the proximal end of the stop table 15. The positioning plate 16 slides to make the stopping flange 152 contact the proximal positioning plate 16, and then the distal positioning plate 16 is fixed to the sliding rack 9 by glue or other fixing forms, and a through hole corresponding to the positioning guide wire 18 is provided on the proximal positioning plate 16.

[0083] In order to enrich the angle selection of the annular hook 181, two positioning grooves 20 are provided, and the two positioning grooves 20 are distributed at 90 degrees.

[0084] In the above embodiment, the method of using the occluder is as follows:

[0085] Step 1: Insert the 0.38-inch puncture guide wire 22 from the product's guide blood return port 23 and extend the guide wire exchange port. Fig.15 shown.

[0086] Step 2: withdraw the puncture guide wire 22 , at which time the blood flows into the guide blood return port 23 and rushes out from the guide wire exchange port, indicating that the guide blood return port 23 and the distal end of the sheath tube 2 are both in the blood vessel 24 .

[0087] Step 3: Press the driving rod 4 to make the ring 401 fit with the handle 1. At this time, the ring at the distal end of the positioning guide wire 18 extends out of the sheath tube 2 and is released. Fig.16 shown.

[0088] Step 4: Then withdraw the occluder as a whole, and position the annular hook 181 at the front end of the guide wire 18 to hook the wall of the blood vessel 24 (special design, increasing the hook size). Note that the blood flow at the guide wire exchange port is significantly reduced or disappears. At this time, slowly withdraw the product and observe the colored block display in the window 11. At this time, the sheath 2 is just outside the wall of the blood vessel 24.

[0089] Step 5: Fig.17 As shown, the button 5 is pressed, the button 5 links the half gear 12, the half gear 12 drives the linkage rack, and then the sheath 2 is driven to withdraw through the gear set 8. Since the proximal end of the internal pushing rod 19 is blocked, the sealing plug will be retained on the outside of the blood vessel 24 wall.

[0090] Step 6: Remove the product as a whole, and leave the plug outside the blood vessel wall to complete the puncture port occlusion.

[0091] After the product is used, the button 5 is pressed, the transmission member 10 is driven, and the annular hook 181 is released. At this time, the positioning guide wire 18 returns to the following process:

[0092] Use the reset column to press inward to unlock the drive rod 4, and lift the button 5 upward to re-engage the wedge-shaped engaging tooth 402 of the drive rod 4 with the card table, and use the recovery rod to push the transmission part 10 toward the distal end, and then slide the rack 9, and finally the positioning guide wire 18 is driven back and finally restored to the initial state.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A restorable vascular occluder, characterized in that: It comprises a handle, a sheath, a puncture guide wire, a positioning guide wire and a pushing rod, wherein the sheath is assembled at the distal end of the handle, the positioning guide wire and the pushing rod are inserted into the inner cavity of the sheath in parallel, and the distal end of the sheath is provided with a sealing plug corresponding to the pushing rod; a driving assembly is arranged in the handle, and the driving assembly comprises a double rack, a gear set, a transmission member and a stopper, the double rack is slidably assembled inside the handle, a gear set is arranged at the proximal end of the double rack, the sliding rack is correspondingly engaged with one of the gears of the gear set and is slidably assembled in the double rack, the transmission member is correspondingly engaged with another gear of the gear set and is slidably assembled in the double rack or inside the handle, the end of the transmission member abuts against the driving rod, and the distal end of the driving rod extends out of the handle; The distal end of the positioning guide wire is made of elastic material and is heat-formed into an annular hook at the distal end. An directional seat corresponding to the positioning guide wire is provided on the double-linked rack. The positioning guide wire is assembled on the directional seat through a stop table so that the annular hook can be formed along a set direction after being extended.

2. The recoverable vascular occluder according to claim 1, characterized in that: The inner wall of the handle is provided with two clamping platforms spaced apart in the pushing direction, and the side of the driving rod is provided with wedge-shaped clamping teeth corresponding to the clamping platforms and with the smaller end pointing to the proximal end; The driving rod is made of elastic material, and a first reset hole corresponding to the middle of the driving rod and located on one side of the card platform is provided in the middle of the handle. In response to the reset column extending through the first reset hole, the driving rod is deformed to the side away from the card platform to release the clamping lock, so that it slides toward the proximal end of the handle and resets under the action of external force; A second reset hole corresponding to the transmission member is provided at the proximal end of the handle. The second reset hole is a bar-shaped hole extending along the pushing direction. In response to a reset column extending through the second reset hole, the transmission member is driven to slide toward the proximal end of the handle and reset.

3. The recoverable vascular occluder according to claim 2, characterized in that: The transmission member is provided with a strip hole or a strip notch corresponding to the second reset hole, and a limiting hook corresponding to the reset column is provided in the strip hole or the strip notch.

4. The recoverable vascular occluder according to claim 1, characterized in that: The gear set comprises a large gear and a small gear with different diameters, wherein the sliding rack meshes with the large gear correspondingly, and the side of the transmission member is provided with a driving tooth corresponding to the small gear and extending along the pushing direction.

5. The recoverable vascular occluder according to claim 1, characterized in that: The distal end of the driving rod is provided with a collar corresponding to the sheath after extending out of the handle, and a positioning column is provided on the other side of the collar relative to the driving rod, and the positioning column is slidably inserted into the distal end of the handle.

6. The recoverable vascular occluder according to claim 1, characterized in that: A notch corresponding to the button is provided in the middle of the handle, one end of the button extends into the handle from the notch and is hinged through a hinge shaft, a half gear is hinged on the side of the button corresponding to the double rack, and the double rack is provided with a driving tooth corresponding to the half gear meshing with the half gear.

7. The recoverable vascular occluder according to claim 1, characterized in that: The orientation seat includes two positioning plates distributed at intervals, the anti-rotation platform is fixed between the two positioning plates, the positioning plate located on the distal side is provided with a positioning groove corresponding to the setting direction of the annular hook, and the anti-rotation platform is provided with an insert plate corresponding to the positioning groove.

8. The recoverable vascular occluder according to claim 7, characterized in that: The anti-rotation platform is a columnar or frustum-shaped structure, wherein a through hole corresponding to the positioning guide wire is provided in the middle thereof, and the plug plate extends along the generatrix of the anti-rotation platform.

9. The recoverable vascular occluder according to claim 8, characterized in that: The positioning plate at the distal end is slidably assembled on the sliding rack, the distal end of the anti-rotation platform is inserted into the positioning plate at the distal end, and a stop flange corresponding to the positioning plate at the proximal end is provided at the proximal end of the anti-rotation platform.

10. The recoverable vascular occluder according to claim 9, characterized in that: There are two positioning grooves, and the two positioning grooves are distributed at 90 degrees.

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