CN107789100B

CN107789100B - Fusion device pusher

Info

Publication number: CN107789100B
Application number: CN201711294590.3A
Authority: CN
Inventors: 李严
Original assignee: Hebei Ruihe Medical Devices Co ltd
Current assignee: Hebei Ruihe Medical Devices Co ltd
Priority date: 2017-12-08
Filing date: 2017-12-08
Publication date: 2024-04-12
Anticipated expiration: 2037-12-08
Also published as: CN107789100A

Abstract

The invention provides a fusion device pusher, which belongs to the field of medical appliances and comprises: a conduit; the flexible pushing core is arranged in the catheter in a sliding manner and used for penetrating out from an opening at the front end of the catheter; and the guide rod is connected with the pushing core, the fusion device is provided with a guide hole with an opening facing the rear end of the fusion device, and the guide rod is used for sliding back and forth in the guide hole under the drive of the pushing core. Under the condition that the fusion device is clamped, the fusion device pusher pushes the guide rod penetrating into the guide hole forwards through the bending of the pushing core, so that the guide rod slides into the preset position of the vertebral body along the guide hole, and then the fusion device is pushed by the guide pipe, so that the fusion device slides into the preset position of the vertebral body along the guide rod, the operation of rotating the fusion device for many times is avoided, the operation process is simplified, and the operation time is shortened.

Description

Fusion device pusher

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a fusion device pusher.

Background

With the increase of the aged people, the osteoporosis vertebral body compression fracture is increased year by year, and simultaneously, the mechanical strength of the vertebral body is reduced due to the vertebral body hemangioma, the myeloma and other various vertebral body tumors, so that the vertebral body compression fracture is caused. The vertebral body compression fracture is mainly manifested by pain, progressive spinal collapse and kyphosis deformity, which seriously affect the life quality, physical activity, psychological health and life span of patients.

In order to reduce the damage to the body of a patient, the traditional surgical treatment method mainly adopts a fusion device to fix and support the vertebral body, cuts a small wound near the vertebra, clamps the rear end of the fusion device through a pushing device and sends the fusion device to a preset position of the vertebra. In this process, the pusher needs to adjust the angle of the fusion device to smoothly feed the fusion device into the predetermined position because the wound is small and the predetermined position in the vertebra has a certain angle with the wound. In the existing pusher, an operator operates the pusher to rotate, so that the fusion device rotates by a certain angle. However, because the incision during the operation is smaller, the existing pusher can only rotate the fusion device by a smaller angle each time, when the fusion device needs to be rotated by a larger angle, the fusion device needs to be loosened, re-clamped and rotated again, and the operation is realized for multiple times, so that the operation difficulty is increased, and the operation time is prolonged.

Disclosure of Invention

The invention aims to provide a fusion device pusher, which solves the technical problem that the existing fusion device pusher in the prior art can send the fusion device into the preset position of the vertebral body only by rotating the fusion device for multiple times under the condition of smaller operation wound

In order to achieve the above purpose, the invention adopts the following technical scheme: there is provided a fusion device pusher comprising: a conduit;

the flexible pushing core is arranged in the catheter in a sliding manner and used for penetrating out from an opening at the front end of the catheter; and

the guide rod is connected with the pushing core, the fusion device is provided with a guide hole with an opening facing the rear end of the fusion device, and the guide rod is used for sliding back and forth in the guide hole under the driving of the pushing core.

Further, the fusion device pusher further comprises a flexible push pipe which is arranged in the catheter and sleeved outside the push core; the ejector tube is in sliding fit with the push core and is used for ejecting the fusion device to slide along the push core.

Further, the ejector tube comprises more than two second snake sections, and the second snake sections are provided with second through holes communicated with the head end and the tail end of the second snake sections; the head end of the second snake section is hinged with the tail end of the second snake section, and the second through holes of the second snake sections are sequentially communicated to form a second guide hole for accommodating the pushing core.

Further, a locking mechanism for enabling the pushing core to become rigid after penetrating into the guide hole is arranged on the pushing core.

Further, the pushing core comprises more than two first snake sections, and the head ends of the first snake sections are hinged with the tail ends of the adjacent first snake sections.

Further, the locking mechanism includes: the first through holes are communicated with the head end and the tail end of the first snake section, and the first through holes adjacent to the first snake section are communicated to form a first guide hole; and

the locking ropes penetrate through the first guide holes and penetrate through the plurality of first snake sections, and the front ends of the locking ropes are connected with the guide rods.

Further, the guide rod is provided with a through hole communicated with the front end and the rear end of the guide rod, the locking rope is arranged in the through hole in a penetrating mode, and the front end of the locking rope is provided with a clamping head used for being clamped with the front end of the through hole.

Further, the guide tube is provided with a telescopic mechanism for pushing the pushing tube forward or pulling the pushing tube backward along the pushing core.

Further, the telescopic mechanism includes: a guide slot extending through a sidewall of the conduit;

the flexible push plate is arranged in the guide pipe and positioned outside the ejector tube, and the front end of the flexible push plate is connected with the front end of the ejector tube and is used for pushing the ejector tube to slide along the ejector core; and

and the pushing handle is arranged outside the guide pipe, passes through the guide groove and is connected with the rear end of the flexible pushing plate.

Further, the outer wall of the catheter is provided with scales which are positioned on one side of the pushing handle and are used for corresponding to the displacement of the pushing handle.

Further, the front end of the catheter is provided with a positioning surface which is attached to the rear end surface of the fusion device.

Further, the guide rod is arc-shaped.

The invention has the beneficial effects that: compared with the prior art, the fusion device pusher disclosed by the invention has the advantages that under the condition that the fusion device is blocked, the guide rod penetrating into the guide hole is pushed forward through the bending of the pushing core, so that the guide rod slides into the preset position of the vertebral body along the guide hole, and then the fusion device is pushed through the guide pipe, so that the fusion device slides into the preset position of the vertebral body along the guide rod, the operation of rotating the fusion device for many times is avoided, the operation process is simplified, and the operation time is shortened.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a construction of a fusion device pusher according to an embodiment of the present invention in a second stage of use;

FIG. 2 is a schematic view of the fusion pusher of FIG. 1 in a third stage of use;

FIG. 3 is a schematic view of the fusion pusher of FIG. 1 in a fourth stage of use;

FIG. 4 is a schematic view of the fusion pusher of FIG. 1 in a fifth step of use;

FIG. 5 is a front view of a fusion pusher according to another embodiment of the present invention;

FIG. 6 is a top view of the fusion pusher shown in FIG. 5;

FIG. 7 is a front view of the fusion pusher of FIG. 5 with the catheter removed;

FIG. 8 is a front view of the pushing core and guide rod of the fusion pusher shown in FIG. 5;

FIG. 9 is a cross-sectional view at A in FIG. 8;

FIG. 10 is an enlarged view at B in FIG. 5;

fig. 11 is a schematic view showing the construction of the fusion pusher shown in fig. 5 in a third step in use.

Wherein, each reference sign in the figure:

1-vertebral body; 11-a predetermined position; 2-fusion device; 21-a guide hole; 3-a catheter; 31-positioning surface; 4-pushing the pipe; 41-a second snake segment; 42-a second through hole; 5-pushing the core; 52-clamping head; 53-first snake section; 54-a first through hole; 55-locking rope; 6, a guide rod; 61-through holes; 71-a guide groove; 72-a flexible push plate; 73-push handle.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.

Referring to fig. 1 to 11 together, a description will now be given of a fusion device pusher according to the present invention. A fusion pusher comprising: a conduit 3;

a flexible pushing core 5 arranged in the catheter 3 in a sliding manner, wherein the pushing core 5 is used for penetrating out from an opening at the front end of the catheter 3; and

the guide rod 6 is connected with the pushing core 5, the fusion device is provided with a guide hole with an opening facing the rear end of the fusion device, and the guide rod 6 is used for sliding back and forth in the guide hole 21 under the driving of the pushing core 5.

Compared with the prior art, the fusion device pushing device provided by the invention has the advantages that under the condition that the fusion device 2 is clamped, the guide rod 6 penetrating into the guide hole 21 is pushed forward through the bending of the pushing core 5, so that the guide rod 6 slides into the preset position 11 of the vertebral body 1 along the guide hole 21, then the fusion device 2 is pushed through the guide pipe 3, the fusion device 2 slides into the preset position 11 of the vertebral body along the guide rod 6, the operation of rotating the fusion device 2 for multiple times is avoided, the operation process is simplified, and the operation time is shortened.

Specifically, the front and rear ends of the catheter 3 are penetrated. The flexible pushing core 5 is arranged in the catheter 3 in a penetrating way, and the pushing core 5 can be an elongated member made of elastic material or flexible material. By pushing and pulling the rear end of the flexible push core 5, the flexible push core 5 slides back and forth in the lumen of the catheter 3, such that the flexible push core 5 extends or retracts from the front end of the lumen of the catheter 3. The rear end of the push core 5 can be provided with a push-pull rod which is penetrated in the catheter 3 and is in sliding fit with the catheter 3, and the rear end of the push core 5 is pushed or pulled by the push-pull rod. The rear end of the guide rod 6 is fixedly connected with the front end of the pushing core 5, and the guide rod 6 is used for penetrating into a guide hole 21 of the fusion device 2 so that the fusion device 2 slides along the guide rod. The guide rod may be in the shape of a circular arc rod, and may be specifically determined according to the angle between the predetermined position 11 of the vertebra and the wound.

In use, referring to fig. 1 to 4, in a first step, the fusion cage 2 is secured. The guide rod 6 is inserted into the guide hole 21 of the fusion device 2, so that the fusion device 2 is sleeved on the guide rod 6, and then the rear end of the push core 5 is pulled, so that the push core 5 is retracted into the inner cavity of the catheter 3, and the fusion device 2 is fixed at the front end of the catheter 3 through the guide rod 6. In the second step, the fusion device 2 is fed. The fusion device 2 is then fed through the catheter 3 to the predetermined location 11 of the vertebra, during which the fusion device 2 will be stuck at the corner of the incision and the predetermined location 11 of the vertebra. Third, the guide bar 6 is pushed in. After the fusion device 2 is clamped at the corner of the wound and the preset position 11 of the vertebra, the rear end of the pushing core 5 is pushed, the pushing core 5 extends out of the opening at the front end of the guide pipe 3 and enters the guide hole 21, the front end of the pushing core 5 pushes the guide rod 6 out of the front end of the guide hole 21, the guide rod 6 enters the preset position 11 of the vertebra, and the guide hole 21 plays a certain guide role on the guide rod 6. Fourth, the cage 2 is pushed in. The guide tube 3 is operated to push the cage 2 so that the cage 2 slides along the guide rod 6 into a predetermined position 11 of the vertebra. Fifth, the guide bar 6 is withdrawn. Finally, the guide rod 6 is withdrawn from the guide hole 21 of the cage 2.

Further, referring to fig. 10, as a specific embodiment of the fusion device pusher provided by the present invention, the fusion device pusher further includes a flexible push pipe 4 disposed in the catheter 3 and sleeved outside the push core 5; the pushing pipe 4 is in sliding fit with the pushing core 5 and is used for pushing the fusion device 2 to slide along the pushing core 5.

Specifically, the ejector tube 4 is flexibly sleeved outside the ejector core 5, and the ejector tube 4 can be a round tube made of elastic material or flexible material. In use, in a fourth step, pushing the cage 2, as shown, the push tube 4 is operated to push the cage 2 forward, causing the cage 2 to slide along the guide rod 6 into the predetermined position 11 of the vertebra. Fifth, the guide bar 6 is withdrawn. As shown, push tube 4 is retracted into the inner cavity of catheter 3, push core 5 is retracted into push tube 4, and guide rod 6 is withdrawn from guide hole 21 of fusion device 2. The rear end of the push pipe 4 can be provided with a guide pipe which is arranged in the guide pipe 3 and sleeved outside the push core 5. The guiding tube is in sliding fit with the pushing core 5 and/or the guiding tube 3 for pushing forward or pulling backward the pushing tube 4

Further, referring to fig. 7 and 10 together, as a specific embodiment of the fusion device pushing device provided by the present invention, the pushing tube 4 includes more than two second snake sections 41, and the second snake sections 41 are provided with second through holes 42 for communicating the head end and the tail end of the second snake sections 41; the head end of the second snake section 41 is hinged with the tail end of the adjacent second snake section 41, and the second through holes 42 of the plurality of second snake sections 41 are sequentially communicated to form a second guide hole for accommodating the pushing core 5.

Specifically, the ejector tube 4 is formed by sequentially hinging a plurality of second snake joints 41, so that the ejector tube 4 is flexible. The second snake section 41 is cylindrical, the head end of the second snake section is a rotating shaft, and the rotating shaft is perpendicular to the head-tail direction of the second snake section 41. The tail end of the second snake section 41 is a groove for accommodating the rotating shaft adjacent to the head end of the second snake section 41. The middle shaft of the second snake section 41 in the head-tail direction is provided with a second through hole 42 which is communicated. The second through holes 42 of the adjacent second snake segments 41 communicate to form second guide holes accommodating the push cores 5, so that the push cores 5 slide in the second guide holes.

Further, as a specific embodiment of the fusion device pusher provided by the invention, the pushing core 5 is provided with a locking mechanism for making the pushing core 5 rigid after penetrating into the guide hole 21. After the third step of pushing in the guide rod 6, the pushing core 5 is made rigid by the locking mechanism, so that the pushing core 5 can better guide the fusion device 2 in the fourth step.

Further, referring to fig. 8 to 9 together, as an embodiment of the fusion device pushing apparatus provided by the present invention, the pushing core 5 includes more than two first snake sections 53, and the head end of each first snake section 53 is hinged to the tail end of the adjacent first snake section 53.

Specifically, the ejector tube 4 is formed by sequentially hinging a plurality of first snake segments 53, so that the ejector tube 4 is flexible. The first snake section 53 is cylindrical, the head end of the first snake section is a rotating shaft, and the rotating shaft is perpendicular to the head-tail direction of the first snake section 53. The tail end of the first snake segment 53 is a groove for receiving the shaft adjacent the head end of the first snake segment 53.

Further, the locking mechanism includes: a first through hole 54 communicating the head end and the tail end of the first snake section 53, the first through holes 54 of adjacent first snake sections 53 communicating to form a first guide hole; and

the front end of the locking rope 55 is connected with the guide rod 6 through the locking rope 55 which passes through the first guide holes and runs through the plurality of first snake segments 53.

The locking rope 55 serves to press the adjacent first snake sections 53 against each other after the rear ends thereof are pulled to frictionally lock the hinge shafts of the adjacent first snake sections 53.

Specifically, the ejector tube 4 is formed by sequentially hinging a plurality of first snake segments 53, so that the ejector tube 4 is flexible. The first snake section 53 is cylindrical, the head end of the first snake section is a rotating shaft, and the rotating shaft is perpendicular to the head-tail direction of the first snake section 53. The tail end of the first snake segment 53 is a groove for receiving the shaft adjacent the head end of the first snake segment 53. The middle shaft of the first snake section 53 in the head-tail direction is provided with a first through hole 54 which is communicated. The first through holes 54 of the adjacent first snake segments 53 communicate to form first guide holes accommodating the locking ropes 55 such that the locking ropes 55 can move back and forth in the first guide holes. The front end of the locking rope 55 is connected with the guide rod 6, the rear end of the pushing core 5 is held by hand or fixed in other ways, and then the rear end of the locking rope 55 is pulled backwards from the rear end of the pushing core 5, so that the guide rod 6 and the rear end of the pushing core 5 mutually squeeze the adjacent first snake sections 53, the friction force of a rotating shaft at the hinged position of the adjacent first snake sections 53 is increased, and the adjacent first snake sections 53 are relatively fixed, so that the pushing core 5 becomes rigid. The push-pull rod at the rear end of the push core 5 is provided with a through hole communicated with the first guide hole, and the locking rope 55 penetrates out of the rear end of the through hole of the push-pull rod.

Further, referring to fig. 9, as a specific embodiment of the fusion device pushing apparatus provided by the present invention, the guide rod 6 is provided with a through hole 61 for communicating the front end and the rear end of the guide rod 6, the locking rope 55 is inserted into the through hole 61, and the front end of the locking rope 55 is provided with a chuck 52 for being engaged with the front end of the through hole 61. The guide rod 6 is a circular arc-shaped circular tube, and a through hole 61 communicating the front end and the rear end of the guide rod is formed in the guide rod. The chuck 52 is spherical or conical. The locking rope 55 is arranged in the pushing core 5 in a penetrating way, and the rear end of the locking rope 55 penetrates out of the rear end of the pushing core 5. The front end of the locking rope 55 passes out of the front end of the push core 5, then passes into the through hole 61 of the guide rod 6 and is connected with the chuck 52 positioned at the front end of the guide rod 6. When the rear end of the locking cord 55 is pulled rearward, the chuck 52 presses the guide bar 6 and the respective first snake segments 53 rearward, so that the guide bar 6 and the push core 5 form a rigid one-piece body. In this solution, the rear end of the guide rod 6 may be hinged to the front end of the push core 5. The rear end of the guide rod 6 is pressed towards the front end of the push core 5 through the clamping head 52, so that the friction force of a rotating shaft at the hinged position of the guide rod 6 and the push core 5 is increased, and the guide rod 6 and the push core 5 are relatively fixed.

Further, referring to fig. 5 to 7 and 11 together, as an embodiment of the fusion device pusher provided by the present invention, the catheter 3 is provided with a telescopic mechanism for pushing or pulling the ejector tube 4 forward or backward along the pushing core 5. The ejector tube 4 is pushed by the telescopic mechanism, so that the operation is convenient and labor-saving.

Further, referring to fig. 5 to 7 and fig. 11 together, as an embodiment of the fusion device pusher provided by the present invention, the telescopic mechanism includes: a guide groove 71 penetrating the side wall of the guide tube 3;

the flexible push plate 72 is arranged in the guide pipe 3 and positioned outside the push pipe 4, and the front end of the flexible push plate 72 is connected with the front end of the push pipe 4 and is used for pushing the push pipe 4 to slide along the push core 5; and

a push handle 73 provided outside the guide tube 3, the push handle 73 passing through the guide groove 71 and being connected to the rear end of the flexible push plate 72.

Specifically, the flexible push plate 72 is disposed in a space outside the knockout tube 4 in the guide tube 3, and the flexible push plate 72 may be a steel strip spring, a rubber strip spring or a plastic strip sheet. The guide groove 71 is an elongated groove penetrating the side wall of the catheter 3, and is provided along the axial direction of the catheter 3 in the longitudinal direction. The push handle 73 is positioned outside the guide tube 3 and is connected with the rear end of the flexible push plate 72 through the guide groove 71. The front end of the flexible push plate 72 is connected to the front end of the ejector tube 4 such that in the fourth step, when the ejector tube 4 is operated to push the fusion device 2 forward, the push handle 73 is pushed forward so that the front end of the flexible push plate 72 protrudes from the front end of the guide tube 3 together with the front end of the ejector tube 4, and the flexible push plate 72 is deformed to adapt to the guiding of the push core 5 which becomes rigid.

Further, as a specific embodiment of the fusion pusher provided by the present invention, the outer wall of the catheter 3 is provided with graduations on one side of the pushing handle 73 for corresponding to the displacement of the pushing handle 73. The scale may be a score line provided along the axial direction of the catheter 3 for indicating the displacement distance. The depth of the push pipe 4 into the preset position 11 of the vertebral body 1 can be known by indicating the displacement of the push handle 73, and the operation is more convenient.

Further, referring to fig. 3 to 4, as an embodiment of the fusion device pusher provided by the present invention, the front end of the catheter 3 has a positioning surface 31 that is attached to the rear end surface of the fusion device 2.

Specifically, the positioning surface 31 is the front end surface of the catheter 3. The front end of the guide rod 6 penetrates from the rear end of the guide hole 21, so that the rear end of the fusion device 2 is abutted with the front end of the catheter 3, and the positioning surface 31 at the front end of the catheter 3 is attached to the rear end surface of the fusion device 2, so that the angle between the fusion device 2 and the catheter 3 is kept fixed. The positioning surface 31 may be a concave surface, and the rear end of the corresponding cage 2 is a convex surface.

Further, referring to fig. 1 to 4 and fig. 8 and 9, as an embodiment of the fusion device pushing device provided by the present invention, the guide rod 6 is circular arc. Specifically, the guide bar 6 is circular arc-shaped. The guide hole 21 of the cage 2 is circular arc-shaped and communicates the front end and the rear end of the cage 2.

Referring to fig. 1 to 7 and 11, the cage 2 is provided with a guide hole 21 for penetrating the guide rod 6. The cage 2 may be provided with a guide hole 21 inside based on the structure of the existing cage 2, the guide hole 21 being provided with an opening on the rear end of the cage 2. In use, the front end of the guide rod 6 penetrates through the opening of the guide hole 21 at the rear end of the fusion device 2 and is clamped with the fusion device 2. The guide hole 21 may be a circular arc-shaped through hole communicating the front end and the rear end of the cage 2.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. A fusion pusher, comprising: a conduit (3);

a flexible pushing core (5) arranged in the guide pipe (3) in a sliding manner, wherein the pushing core (5) is used for penetrating out from an opening at the front end of the guide pipe (3); and

the guide rod (6) is connected with the pushing core (5), the fusion device is provided with a guide hole (21) with an opening facing the rear end of the fusion device, and the guide rod (6) is used for sliding back and forth in the guide hole (21) under the driving of the pushing core (5);

the rear end of the pushing core (5) is provided with a push-pull rod which penetrates through the guide pipe (3) and is in sliding fit with the guide pipe (3), and the rear end of the pushing core (5) is pushed or pulled through the push-pull rod;

the fusion device pusher further comprises a flexible push pipe (4) which is arranged in the guide pipe (3) and sleeved outside the push core (5); the ejector tube (4) is in sliding fit with the pushing core (5) and is used for ejecting the fusion device (2) to slide along the pushing core (5);

the pushing core (5) is provided with a locking mechanism for enabling the pushing core (5) to become rigid after penetrating into the guide hole (21);

the pushing core (5) comprises more than two first snake sections (53), and the head ends of the first snake sections (53) are hinged with the tail ends of the adjacent first snake sections (53);

the locking mechanism includes: a first through hole (54) communicating the head end and the tail end of the first snake section (53), wherein the first through holes (54) adjacent to the first snake section (53) are communicated to form a first guide hole; and

the locking rope (55) passes through the first guide holes and penetrates through the plurality of first snake sections (53), and the front end of the locking rope (55) is connected with the guide rod (6);

the guide rod (6) is provided with a through hole (61) communicated with the front end and the rear end of the guide rod (6), the locking rope (55) is arranged in the through hole (61) in a penetrating mode, and the front end of the locking rope (55) is provided with a clamping head (52) used for being clamped with the front end of the through hole (61).

2. The fusion pusher of claim 1, wherein: the ejector tube (4) comprises more than two second snake sections (41), and the second snake sections (41) are provided with second through holes (42) which are communicated with the head end and the tail end of the second snake sections (41); the head end of the second snake section (41) is hinged with the tail end of the adjacent second snake section (41), and the second through holes (42) of the plurality of second snake sections (41) are sequentially communicated to form a second guide hole for accommodating the pushing core (5).

3. The fusion pusher of claim 1 or 2, wherein: the guide pipe (3) is provided with a telescopic mechanism for pushing the pushing pipe (4) forwards or pulling the pushing pipe backwards along the pushing core (5).

4. The fusion pusher of claim 3, wherein: the telescopic mechanism comprises: a guide slot (71) penetrating the side wall of the conduit (3);

the flexible push plate (72) is arranged in the guide pipe (3) and positioned outside the ejector tube (4), and the front end of the flexible push plate (72) is connected with the front end of the ejector tube (4) and is used for pushing the ejector tube (4) to slide along the ejector core (5); and

and the pushing handle (73) is arranged outside the guide pipe (3), and the pushing handle (73) passes through the guide groove (71) and is connected with the rear end of the flexible push plate (72).

5. The fusion pusher of claim 4, wherein: the outer wall of the catheter (3) is provided with scales which are positioned on one side of the pushing handle (73) and are used for corresponding to the displacement of the pushing handle (73).