Fusion device holding device

Abstract

The present invention discloses a fusion device holding device, comprising: a holding device and a wrapping layer, wherein the holding device is detachably connected to the fusion device, and the wrapping layer is wrapped around the outside of the fusion device to prevent the bone fragments inside the fusion device from being lost; the holding device pushes the fusion device wrapped with the wrapping layer to a target position, separates from the fusion device, and exits. The present invention can solve the problem of bone fragments being lost inside the fusion device during surgery by wrapping the wrapping layer outside the fusion device.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a fusion device holding device. Background Art

[0002] The existing intervertebral fusion surgery based on endoscope is performed under water medium, and there is strong water pressure in the process. Before the fusion device is placed in the intervertebral space, a large amount of bone fragments are filled in its cavity, and there is no wrapping after filling. At present, in a large number of surgeries, during the process of implanting the fusion device in the human intervertebral space, the bone fragments are washed away by water pressure, and the expected surgical effect cannot be achieved. Summary of the invention

[0003] In order to solve the above technical problems, the present invention aims to provide a fusion device holding device, which solves the problem of bone fragment loss in the fusion device cavity.

[0004] To achieve the above object, the technical solution of the present invention is:

[0005] A fusion device holding device, comprising:

[0006] A holder is detachably connected to the fusion device.

[0007] A wrapping layer, covering the outside of the fusion device, for preventing the loss of bone fragments inside the fusion device;

[0008] After the holder pushes the fusion device wrapped with the wrapping layer to the target position, it separates from the fusion device and exits.

[0009] In this technical solution, before the fusion device is implanted between vertebrae, a wrapping layer is wrapped around the outside of the fusion device, so that during the operation, the bone fragments in the fusion device will not be lost because of the wrapping layer. Then the holder pushes the fusion device wrapped with the wrapping layer into the intervertebral space, separates it from the fusion device and removes it from the body.

[0010] Preferably, the wrapping layer is a sleeve-like structure with an opening, the wrapping layer is sleeved on the fusion device through the opening, and the edge of the opening is clamped between the holder and the fusion device to achieve sealing and fixation.

[0011] Preferably, the holder comprises an outer tube and a core rod, wherein the core rod is disposed in the outer tube and can rotate relative to the outer tube;

[0012] A positioning structure is provided between one end of the outer tube and the fusion device, and one end of the core rod extends out of the outer tube and is threadedly connected to the fusion device;

[0013] After the outer tube is positioned with the fusion device through the positioning structure, the threaded connection with the fusion device is achieved by rotating the core rod. During the rotation of the core rod, the outer tube is driven to move toward one side of the fusion device until the end of the outer tube fits with the fusion device and clamps the edge of the opening between the two.

[0014] Preferably, the opposite end surfaces of the outer tube and the fusion device are matching and fitting arc surfaces.

[0015] Preferably, the positioning structure comprises at least one plug block provided on the outer tube and at least one plug hole provided on the fusion device, and the plug block is inserted into the plug hole to achieve positioning.

[0016] Preferably, the wrapping layer is a material that is degradable in the body. In the present technical solution, after the fusion device is implanted between vertebrae, the degradable wrapping layer degrades within a week or even less due to the degradability of the material itself, exposing the broken bones in the fusion device, promoting bone growth, and achieving intervertebral fusion.

[0017] Preferably, the wrapping layer is a material that is non-degradable in a living body, and a wrapping layer removal component is provided on the holder, and the wrapping layer removal component is used to remove the wrapping layer from the living body after the fusion device is implanted in the target position.

[0018] In this technical solution, if the wrapping layer is a non-degradable material in the body, a wrapping layer removal device is provided on the holder, and after the fusion device is implanted between vertebrae, the wrapping layer is removed from the body by the wrapping layer removal device when the holder is separated from the fusion device.

[0019] Preferably, the wrapping layer removal assembly comprises a guide wire, one end of which is connected to the wrapping layer, and the other end of which extends along the holder to an end away from the fusion device;

[0020] After the fusion device reaches the target position and is separated from the holder, the guide wire is pulled out from the end away from the fusion device and the wrapping layer is simultaneously pulled out of the body.

[0021] Preferably, the guide wire is inserted into the outer tube, and a through hole is respectively provided on both ends of the outer tube, and both ends of the guide wire extend out through the two through holes respectively; one end of the guide wire extends out of the outer tube through the through hole and then connects to the wrapping layer, and the other end extends out of the outer tube through the through hole and then extends toward one end of the holder away from the fusion device.

[0022] Preferably, the through hole is a waist-shaped hole.

[0023] Preferably, a connecting hole is provided on the wrapping layer wrapping the outside of the fusion device, and one end of the guide wire is bent and hooked in the connecting hole to realize connection with the wrapping layer.

[0024] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art:

[0025] 1. The present invention coats the outside of the fusion device with a wrapping layer, and when the fusion device is implanted, the entire fusion device is wrapped by the wrapping layer, so that the bone fragments in the fusion device are unlikely to be lost.

[0026] 2. A preferred embodiment of the present invention uses a wrapping layer that is degradable in the body, and the entire fusion device is wrapped in the wrapping layer. The opening edge of the wrapping layer is clamped between the holder and the fusion device to achieve sealing and fixation of the wrapping layer, so that no bone fragments are lost during the operation. After the fusion device is implanted between the vertebrae, the wrapping layer of the degradable material in the body does not need to be taken out. Due to the degradability of the material itself, it will degrade within a week or even less time, exposing the bone fragments in the fusion device, promoting bone growth, and achieving intervertebral fusion.

[0027] 3. In another preferred embodiment of the present invention, when a non-degradable wrapping layer in a living body is selected, a wrapping layer removal component is provided on the holder, preferably using a guide wire, one end of the guide wire is connected to the wrapping layer, and the other end extends to an end away from the fusion device. After the fusion device is implanted between vertebrae, when the holder is separated from the fusion device, the wrapping layer can be separated from the fusion device and pulled out of the living body by pulling out the end of the guide wire away from the fusion device. In a preferred embodiment, lead holes are respectively provided at both ends of the outer tube of the holder, and both ends of the guide wire extend out through the two lead holes respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of a fusion device holding device according to Example 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of a fusion device holding device according to Example 2 of the present invention.

[0030] Explanation of reference numerals: 1 - wrapping layer; 2 - fusion device; 3 - holder; 301 - outer tube; 302 - core rod; 303 - plug block; 4 - guide wire; 5 - insertion hole; 6 - connecting hole. DETAILED DESCRIPTION

[0031] The advantages and features of the present invention will become more apparent from the following description and claims.

[0032] refer to Figure 1 A fusion device holding device, comprising: a holding device 3 and a wrapping layer 1,

[0033] The holder 3 is detachably connected to the fusion device 2. Usually, the holder 3 includes an outer tube 301 and a core rod 302. The core rod 302 is arranged in the outer tube 301 and can rotate relative to the outer tube 301. A positioning structure is arranged between one end of the outer tube 301 and the fusion device 2. One end of the core rod 302 extends out of the outer tube 301 and is threadedly connected to the fusion device 2.

[0034] The wrapping layer 1 is coated on the outside of the fusion device 2 to prevent the bone fragments inside the fusion device 2 from being lost; the holder 3 pushes the fusion device 2 wrapped with the wrapping layer 1 to the target position, separates from the fusion device 2 and exits.

[0035] The advantages and features of the present invention are described below with reference to specific embodiments.

[0036] like Figure 1 As shown, the positioning structure of the outer tube 301 of the present embodiment includes two plug blocks 303 arranged on the outer tube 301 and two corresponding sockets arranged on the fusion device 2. The plug blocks 303 are inserted into the sockets to realize the positioning function of the outer tube 301. The core rod 302 extends from the middle of the plug block 303 of the outer tube 301, continuously spirals into the fusion device 2, and finally holds the fusion device 2 tightly to achieve the fixation of the holder 3 and the fusion device 2. Of course, there are many positioning structures for realizing the outer tube 301 and the fusion device 2, such as setting an plug block 303 and a socket, or according to the different shapes of the fusion device 2 and the holder 3, the shape of the plug block will also be different, which are not listed here one by one.

[0037] According to whether the wrapping layer 1 is made of biodegradable material, the present invention is described in two preferred embodiments.

[0038] Example 1

[0039] The wrapping layer 1 is a material that is degradable in the body. In order to ensure that the wrapping layer 1 can be tightly wrapped around the fusion device 2, the wrapping layer 1 is preferably a sleeve-like structure with an opening. The wrapping layer 1 is sleeved on the fusion device 2 through the opening, and the edge of the opening is clamped between the holder 3 and the fusion device 2 to achieve sealing and fixation; of course, the wrapping layer 1 can also be adhered to the outside of the fusion device 2 or through a vacuum method, or the wrapping layer 1 can be designed as a capsule-like shell wrapped around the outside of the fusion device, etc., which are not listed one by one here. The fixing method of this embodiment does not require other process fixation, which is simple and convenient.

[0040] The wrapping layer 1 is a material that is degradable in the body. In this embodiment, after the fusion device 2 is implanted between vertebrae, the degradable wrapping layer 1 degrades within a week or even less due to the material's own degradability, exposing the broken bones in the fusion device 2, promoting bone growth, and achieving intervertebral fusion.

[0041] After the outer tube 301 is positioned with the fusion device 2 through the positioning structure, the threaded connection with the fusion device 2 is achieved by rotating the core rod 302. During the rotation of the core rod 302, the outer tube 301 is driven to move toward one side of the fusion device 2 until the end of the outer tube 301 fits with the fusion device 2 and clamps the edge of the opening of the fusion device 2 between the two.

[0042] In a preferred embodiment, the opposite end surfaces of the outer tube 301 and the fusion device 2 are in the form of matching and fitting arc surfaces. Of course, the opposite end surfaces of the outer tube 301 and the fusion device 2 may also be rectangular or irregular in shape. The use of matching and fitting arc surfaces not only makes the outer tube 301 and the fusion device 2 fit more closely, and the fixing effect of the wrapping layer 1 is better, but also the processing is relatively easy compared to irregular shapes.

[0043] Example 2

[0044] If the wrapping layer 1 is a material that is non-degradable in the body, the fixing method of the wrapping layer 1 is the same as that of Example 1. After the fusion device 2 is implanted between vertebrae, the wrapping layer 1 needs to be removed. Therefore, a wrapping layer removal component needs to be provided on the holder 3 to remove the wrapping layer 1 from the body after the fusion device 2 is implanted between vertebrae.

[0045] In this embodiment, if Figure 2 The wrapping layer removal component includes a guide wire 4, one end of which is connected to the wrapping layer 1, and the other end extends along the holder 3 to the end away from the fusion device 2; after the fusion device 2 reaches the intervertebral space and is separated from the holder 3, the guide wire 4 is pulled out from the end away from the fusion device 2 and the wrapping layer 1 is pulled out of the body at the same time.

[0046] In a preferred embodiment, the guide wire 4 is inserted into the outer tube 301, and a through hole 5 is provided at each end of the outer tube 301, and the two ends of the guide wire 4 extend out through the two through holes 5; one end of the guide wire 4 extends out of the outer tube 301 through the through hole 5 and then connects to the wrapping layer 1, and the other end extends out of the outer tube 301 through the through hole 5 and then extends toward the end of the holder 3 away from the fusion device 2. After the fusion device 2 reaches the intervertebral space, the core rod 302 is loosened, and the end of the guide wire 4 away from the fusion device 2 is extracted, and the guide wire 4 enters the through hole 5 together with the wrapping layer 1 to remove the wrapping layer 1. In addition to the method of this embodiment, there are many other ways to fix the guide wire 4 on the outer tube 301, for example, the guide wire 4 can be clamped outside the outer tube 301 to ensure that the guide wire 4 can move freely. By adopting the method of the present invention, the guide wire 4 can not only be firmly inserted into the outer tube 301, but also can be freely pulled out.

[0047] In a preferred embodiment, the through hole 5 is a waist-shaped hole. When the wrapping layer 1 is pulled, the wrapping layer forms a strip-like object. The through hole 4 is designed to be a waist-shaped hole, which not only facilitates the guide wire 4 to extend in and out, but also facilitates the wrapping layer 1 to enter the outer tube 301 through the through hole 5.

[0048] In order to achieve the connection between the guide wire 4 and the wrapping layer 1, in this embodiment, a connection hole 6 is set on the wrapping layer 1 wrapped around the outside of the fusion device 2, and one end of the guide wire 4 is bent and hooked in the connection hole 6, so that the guide wire 4 will not fall out of the connection hole 6. Of course, one end of the guide wire 4 can also be glued to the wrapping layer 1 to achieve the connection between the guide wire and the wrapping layer 1.

[0049] like Figure 1-2 As shown, after the plug block 303 on the outer tube 301 is inserted into the insertion hole to realize the positioning of the outer tube 301 and the fusion device 2, before tightening the fusion device 2 and the holder 3, the opening edge of the wrapping layer 1 wrapping the fusion device 2 is inserted into the gap between the outer tube 301 of the holder 3 and the fusion device 2, and the threaded connection of the fusion device 2 is realized by rotating the core rod 302. During the rotation of the core rod 302, the outer tube 301 is driven to move toward the side of the fusion device 2 until the outer tube 301 and the fusion device 2 are fitted, and the opening edge of the wrapping layer 1 is clamped between the outer tube 301 and the fusion device 2 to realize the fixation of the wrapping layer 1;

[0050] If the wrapping layer 1 is made of a biodegradable material, after the fusion cage 2 is implanted between vertebrae, the wrapping layer 1 does not need to be taken out of the body when the holder 3 leaves the fusion cage 2. Due to the biodegradability of the material itself, it will degrade within a week or even less, exposing the broken bones in the fusion cage 2, promoting bone growth, and achieving intervertebral fusion;

[0051] If a wrapping layer 1 made of a non-biodegradable material is selected, a connecting hole 6 is set on the wrapping layer, one end of the guide wire 4 is bent and hooked in the connecting hole 6, and the guide wire 4 is set on the holder 3 through the through-hole 5 on the outer tube 301 of the holder 3. After the fusion device 2 is implanted between vertebrae, the core rod 302 is loosened, the guide wire 4 is pulled out of the body, and the wrapping layer 1 is inserted into the through-hole 5 together, so that the wrapping layer 1 is pulled out.

[0052] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A fusion device holding device, characterized in that: include: A holder is detachably connected to the fusion device. A wrapping layer, covering the outside of the fusion device, for preventing the loss of bone fragments inside the fusion device; After the holder pushes the fusion device wrapped with the wrapping layer to the target position, it separates from the fusion device and exits; The wrapping layer is a sleeve-shaped structure with an opening, the wrapping layer is sleeved on the fusion device through the opening, and the edge of the opening is clamped between the holder and the fusion device to achieve sealing and fixing; The wrapping layer is a material that is non-degradable in the body, and the holder is provided with a wrapping layer removal component, which is used to remove the wrapping layer from the body after the fusion device is implanted in the target position; The wrapping layer removal assembly comprises a guide wire, one end of which is connected to the wrapping layer, and the other end of which extends along the holder to an end away from the fusion device; After the fusion device reaches the target position and is separated from the holder, the guide wire is pulled out from the end away from the fusion device and the wrapping layer is pulled out of the body at the same time; The holder comprises an outer tube and a core rod, wherein the core rod is arranged in the outer tube and rotates relative to the outer tube; A positioning structure is provided between one end of the outer tube and the fusion device, and one end of the core rod extends out of the outer tube and is threadedly connected to the fusion device; The opposite end faces of the outer tube and the fusion device are in the form of matching arc surfaces, and the positioning structure comprises at least one plug block arranged on the outer tube and at least one plug hole arranged on the fusion device, and the plug block is inserted in the plug hole to achieve positioning.

2. The fusion device holding device according to claim 1, characterized in that: After the outer tube is positioned with the fusion device through the positioning structure, the threaded connection with the fusion device is achieved by rotating the core rod. During the rotation of the core rod, the outer tube is driven to move toward one side of the fusion device until the end of the outer tube fits with the fusion device and clamps the edge of the opening between the two.

3. The fusion device holding device according to claim 2, characterized in that: The guide wire is inserted into the outer tube, and a guide hole is respectively provided on both ends of the outer tube, and both ends of the guide wire extend out through the two guide holes respectively; one end of the guide wire extends out of the outer tube through the guide hole and then connects to the wrapping layer, and the other end extends out of the outer tube through the guide hole and then extends toward one end of the holder away from the fusion device.

4. The fusion device holding device according to claim 3, characterized in that: The through hole is a waist-shaped hole.

5. The fusion device holding device according to claim 1, characterized in that: A connecting hole is arranged on the wrapping layer wrapped around the outside of the fusion device, and one end of the guide wire is bent and hooked in the connecting hole to realize connection with the wrapping layer.

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