A vertebral body implant

Abstract

The present application provides a kind of vertebral body implant device, including injection pipe, top rod, fitting claw and net bag body, the top rod is arranged in the injection pipe, one end of the fitting claw is connected with the net bag body, the other end of the fitting claw is connected with the injection pipe, the injection pipe is communicated with the net bag body by the fitting claw, the top rod is used to separate the fitting claw and the injection pipe connected with each other.The fitting claw is connected with the injection pipe and the net bag body respectively, the net bag body cannot easily separate from the injection pipe, after the bone cement is input into the injection pipe by injection instrument, the bone cement in the injection pipe is pushed into the net bag body under the action of the top rod, when the top rod moves to the fitting claw and the injection pipe connection, the top rod pushes the fitting claw and the injection pipe to separate, so that the fitting claw and the net bag body remain in the vertebral body of patient, and the top rod and the injection pipe are recycled, the separation of the net bag body and the injection pipe can be completed without rotating the net bag body, which reduces the risk of operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a vertebral body implant device. BACKGROUND

[0002] Many treatment methods have been developed for osteoporotic vertebral compression fractures, among which percutaneous vertebroplasty using bone cement is widely praised for its small trauma, short operation time and immediate effect. The products currently used in clinical practice are divided into two categories in terms of net bag connection and release structure design. One is threaded connection, which has a threaded structure on the metal part, can achieve threaded connection, and can achieve net bag separation by rotating out the threaded structure. The other is compression connection, in which the tail end of the net bag is directly placed into two tubular metal parts with different diameters and a stepped structure, and the net bag is connected by compression between the double-layer tube parts. When released, the smaller inner layer tube is removed to release the compression state, and then the outer layer tube is removed to separate the net bag.

[0003] The prior art adopts a threaded connection structure design. In the net bag disengagement step, the input pipe needs to be rotated several turns. The rotating support fixed structure is the bone cement net bag after solidification. When the bone cement injection amount is small, the bone cement cannot be exuded outside the net bag, and the net bag as a whole cannot be fixed during rotation, resulting in the net bag being unable to disengage, which poses a risk to the treatment process.

[0004] Therefore, a vertebral body implant device is designed to solve the problem that the net bag as a whole cannot be fixed when the input pipe is rotated to disengage the net bag, resulting in the net bag being unable to disengage and posing a risk to the operation. SUMMARY

[0005] To overcome the shortcomings of the prior art, the present application provides a vertebral body implant device.

[0006] To achieve the above-mentioned purpose, in a first aspect, the present application provides a vertebral body implant device, comprising an injection pipe, a top rod, an embedded claw and a net bag body. The top rod is arranged in the injection pipe. One end of the embedded claw is connected to the net bag body, and the other end of the embedded claw is connected to the injection pipe. The injection pipe and the net bag body are connected through the embedded claw. The top rod is used to separate the embedded claw and the injection pipe from each other.

[0007] In combination with the first aspect, in a possible implementation, the embedded claw comprises a fixed part and a clamping part. The clamping part is a flexible structure. The fixed part is fixedly connected to the opening of the net bag body. The end of the injection pipe close to the embedded claw is provided with a matching part. The clamping part can be clamped and matched with the matching part.

[0008] With reference to the first aspect, in a possible implementation form of the first aspect, the top rod is provided with a groove near an end face of the embedded claw, the groove is capable of extruding and deforming the clamping part, so as to separate the embedded claw from the injection pipe.

[0009] With reference to the first aspect, in a possible implementation form of the first aspect, the clamping part is a clamping claw, the clamping part is a clamping claw, and the matching part is a stepped structure, the clamping claw is capable of being matched and connected with the matching part.

[0010] With reference to the first aspect, in a possible implementation form of the first aspect, the fixing part is uniformly provided with a plurality of clamping claws in a circumferential direction away from an end face of the mesh bag body.

[0011] With reference to the first aspect, in a possible implementation form of the first aspect, the embedded claw comprises a fixing part and a clamping part, the fixing part is fixedly connected with an opening of the mesh bag body, the injection pipe is provided with a matching part at one end near the embedded claw, the matching part is provided with an elastic sheet, and the clamping part is provided with a protrusion on a side surface, the elastic sheet is capable of being clamped and matched with the protrusion.

[0012] With reference to the first aspect, in a possible implementation form of the first aspect, the matching part is uniformly provided with a plurality of elastic sheets in a circumferential direction.

[0013] With reference to the first aspect, in a possible implementation form of the first aspect, the embedded claw comprises a fixing part and a clamping part, the fixing part is fixedly connected with an opening of the mesh bag body, the injection pipe is provided with a matching part at one end near the embedded claw, a clamping groove is arranged on a side surface of the matching part, an inner surface of the clamping groove is in communication with an end face of the matching part, and a clamping strip is arranged on a side surface of the clamping part, the clamping groove is capable of being matched and connected with the clamping strip.

[0014] With reference to the first aspect, in a possible implementation form of the first aspect, the injection pipe comprises a first handle and a pipe body, the first handle is connected with one end of the pipe body, and the other end of the embedded claw is clamped with the other end of the pipe body away from the first handle.

[0015] With reference to the first aspect, in a possible implementation form of the first aspect, the top rod comprises a second handle and a rod body, the second handle is arranged at one end of the rod body, and the other end of the rod body is arranged in the pipe body.

[0016] The embodiments of the present application have the following advantages:

[0017] Compared with the prior art, the vertebral body implant device provided by the application installs the fitting claw between the net bag body and the injection pipe, the fitting claw is connected with the injection pipe and the net bag body respectively, the net bag body cannot be easily separated from the injection pipe, the bone cement is input into the injection pipe through the injection instrument, and then the bone cement in the injection pipe is pushed into the net bag body under the action of the jacking rod; when the jacking rod moves to the position where the fitting claw is clamped with the injection pipe, the jacking rod pushes the fitting claw to separate from the injection pipe, so that the fitting claw and the net bag body remain in the vertebral body of the patient, and the jacking rod and the injection pipe are recycled; the separation of the net bag body and the injection pipe can be completed without rotating the net bag body, and the risk of surgery is reduced.

[0018] In order to make the above-mentioned purpose, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 A structural schematic diagram of a vertebral body implant device is shown;

[0021] Figure 2 A mounting structure schematic diagram of a fitting claw is shown;

[0022] Figure 3 A mounting structure schematic diagram of a jacking rod and an injection pipe is shown;

[0023] Figure 4 A mounting structure schematic diagram of an elastic sheet and a pipe body is shown;

[0024] Figure 5 A mounting structure schematic diagram of a protrusion and a fixing part is shown;

[0025] Figure 6 A structure schematic diagram of a clamping groove and a clamping strip is shown.

[0026] Main element symbol explanation:

[0027] 100-injection pipe, 110-first handle, 120-pipe body, 121-matching part, 122-elastic sheet, 123-clamping groove, 200-jacking rod, 210-second handle, 220-rod body, 230-groove, 300-fitting claw, 310-fixing part, 320-clamping part, 321-clamping claw, 322-protrusion, 325-clamping strip, 400-net bag body. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below are exemplary only, and are merely intended to explain the present application, and are not to be understood as limiting the present application.

[0029] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientations or positional relationships shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In addition, the terms "first", "second", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0031] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing", and the like should be understood broadly, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over", and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under", and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] Example One

[0034] Please refer to Figure 1 The present application provides a kind of vertebral body implant device, including injection tube 100, top rod 200, embedded claw 300 and net bag body 400.The injection tube 100 is arranged in the top rod 200, one end of the embedded claw 300 is connected with the net bag body 400, the other end of the embedded claw 300 is connected with the injection tube 100, the injection tube 100 is communicated with the net bag body 400 by the embedded claw 300, and the top rod 200 is used to separate the injection tube 100 in the mutual clamping from the embedded claw 300.

[0035] In the embodiment, the injection tube 100 is a hollow tubular structure with both ends open, one end of the top rod 200 is inserted into the injection tube 100, and the other end of the top rod 200 is located outside the injection tube 100.Both the injection tube 100 and the top rod 200 are long straight rods, which facilitates the movement of the top rod 200 in the injection tube 100, and there is a gap between the outer side of the top rod 200 and the inner wall of the injection tube 100.

[0036] Please continue to refer to Figure 1 And Figure 3 The injection tube 100 includes a first handle 110 and a tube body 120, and the first handle 110 is fixedly connected with the tube body 120.Both the first handle 110 and the tube body 120 are hollow structures with both ends through, and since there is a gap between the inner wall of the tube body 120 and the outer side of the top rod 200, the top rod 200 can be inserted into the open end of the first handle 110 and moved into the tube body 120, and finally the end of the top rod 200 stops near the outlet end of the tube body 120.

[0037] In the embodiment, when the injection tube 100 is connected with the net bag body 400 through the embedded claw 300, first place the net bag body 400, which has not been filled with bone cement, into the vertebral body, then input the bone cement into the tube body 120 through the injection instrument at the opening of the first handle 110, control the first handle 110 with hand to keep the stability of the injection tube 100, control the injection amount of the bone cement of the injection instrument, and stop injecting into the injection tube 100 when the required injection amount of the bone cement is reached.Insert the top rod 200 into the injection tube 100 from the open end of the first handle 110, since there is a gap between the top rod 200 and the inner wall of the tube body 120, it can not only ensure the smooth movement of the top rod 200 in the injection tube 100, but also make the top rod 200 push the bone cement in the injection tube 100 into the net bag body 400, until the bone cement in the injection tube 100 is completely injected into the net bag body 400 to complete the injection process.

[0038] In the embodiment, the net bag body 400 is a freely contractible bag structure. When the net bag body 400 has not yet been filled with bone cement, the net bag body 400 is in a flat structure, which facilitates the operator to place the net bag body 400 into the vertebral body. The opening of the net bag body 400 is provided with the fitting claw 300. The side of the fitting claw 300 close to the net bag body 400 is sealingly and fixedly connected with the net bag body 400. The end of the fitting claw 300 away from the net bag body 400 is provided with an elastic buckle structure. The elastic buckle structure of the fitting claw 300 can be clamped with the end of the injection pipe 100 close to the net bag body 400.

[0039] Please refer to Figure 2 The fitting claw 300 comprises a fixed part 310 and a clamping part 320. The fixed part 310 is made of metal, and the clamping part 320 is provided with an elastic structure. The end of the injection pipe 100 close to the fitting claw 300 is provided with a matching part 121. The clamping part 320 can be clamped with the matching part 121. The outer side of the fixed part 310 is in a cylindrical shape. The side of the fixed part 310 is provided with a sawtooth clamping structure. The sawtooth clamping structure of the fixed part 310 can lock the opening edge of the net bag body 400 on the fixed part 310. The end of the fixed part 310 can be inserted into the inside of the net bag body 400, so as to ensure that the fitting claw 300 can be fixed as a whole with the net bag body 400, and the bone cement can be input into the inside of the net bag body 400 through the fitting claw 300, so as to avoid the bone cement from leaking out from the connection between the net bag body 400 and the fitting claw 300.

[0040] Please continue to refer to Figure 2 The clamping part 320 is provided with a buckle structure. The end of the fixed part 310 away from the net bag body 400 is provided with a plurality of clamping claws 321 which are uniformly arranged in a circumferential direction. The clamping claws 321 are provided with an elastic structure. The clamping claws 321 can be connected with the matching part 121.

[0041] In the embodiment, when the fitting claw 300 needs to be installed on the injection pipe 100, the clamping claws 321 are provided with an elastic structure. When the clamping claws 321 are inserted into the pipe body 120, the clamping claws 321 can be pressed and closed to each other. The clamping claws 321 can be locked at the matching part 121. When there is no external force to press the plurality of clamping claws 321 to close to each other, the clamping claws 321 can be stably clamped in the pipe body 120, so as to make the injection pipe 100, the fitting claw 300 and the net bag body 400 into an integrated structure.

[0042] In the embodiment, when the bone cement needs to be injected into the mesh bag body 400 through the injection tube 100, the clamping portion 320 is clamped on the matching portion 121, at this time the embedded claw 300 cannot be separated from the tube body 120 by itself without external force, and the tube body 120 and the mesh bag body 400 can be ensured to be in close communication, so that the injection process of the bone cement can be smoothly carried out. After the injection of the bone cement is completed, the clamping portion 320 is pushed away from the matching portion 121 under the action of the top rod 200 due to the elastic structure of the clamping portion 320, so that the embedded claw 300 and the injection tube 100 are away from each other, the top rod 200 and the injection tube 100 are taken out from the vertebral body of the patient by the operator, the embedded claw 300 and the mesh bag body 400 are left in the vertebral body, and the whole injection process of the bone cement is completed.

[0043] Please continue to refer to Figure 1 and Figure 3 , the top rod 200 includes a second handle 210 and a rod body 220, the second handle 210 is injection molded on the end of the rod body 220, a groove 230 is opened on the end face of the rod body 220 away from the second handle 210, the diameter of the groove 230 is less than or equal to the inner diameter of the boss in the tube body 120, and the groove 230 can cooperate with the clamping portion 320.

[0044] In the embodiment, the second handle 210 is made of plastic material, and the rod body 220 is made of metal material. The diameter of the second handle 210 is greater than the inner diameter of the tube body 120, and the operator manually controls the second handle 210 when the rod body 220 needs to be inserted into the injection tube 100. Since the diameter of the second handle 210 is greater than the inner diameter of the tube body 120, when the top rod 200 moves into the injection tube 100 until the second handle 210 abuts against the entrance of the injection tube 100, the top rod 200 cannot continue to move into the injection tube 100. At this time, the clamping portion 320 is inserted into the groove 230, and the clamping portion 320 gradually separates from the matching portion 121 during the insertion process. When the clamping portion 320 is completely separated from the matching portion 121, the injection tube 100 and the top rod 200 are separated from the embedded claw 300, and the injection of the bone cement is completed.

[0045] In the embodiment, when the device works, the mesh bag body 400 is first fixedly connected with the fixing portion 310, and the clamping portion 320 is connected with the matching portion 121, so that the bone cement flowing out of the tube body 120 can be injected into the mesh bag body 400 through the embedded claw 300, and the injection tube 100, the embedded claw 300 and the mesh bag body 400 are integrated. The mesh bag body 400 and the embedded claw 300 are placed in the vertebral body of the patient, the bone cement is injected from the open end of the first handle 110 through the injection instrument, the injection instrument is removed after the injection amount is reached. Then the first handle 110 is held by hand to avoid the deviation of the tube body 120, and the rod body 220 is inserted into the open end of the first handle 110 by controlling the second handle 210.

[0046] When the rod 220 moves along the axial direction of the tube 120, the rod 220 pushes the bone cement in the tube 120 to the outlet end of the connecting fitting claw 300. Since the tube 120 is in communication with the mesh bag 400, the bone cement discharged from the outlet end of the tube 120 is injected into the mesh bag 400 until the rod 220 completely pushes the bone cement in the tube 120 into the mesh bag 400. At this time, the groove 230 moves to the clamping portion 320, and the clamping portion 320 is inserted into the groove 230 as the rod 220 continues to move into the tube 120. The clamping portion 320 with elasticity is separated from the matching portion 121. The fitting claw 300 is separated from the tube 120, and the operator can take out the injection tube 100 and the top rod 200. Since the sharp portion of the fitting claw 300 is designed and processed with a rounded corner, and the fitting claw 300 is wrapped when the bone cement overflows from the fitting claw 300, the fitting claw 300 can avoid causing secondary damage to the body.

[0047] Embodiment Two

[0048] Please refer to Figure 4 and Figure 5 , the present embodiment provides a vertebral body implant device, the present embodiment is improved on the basis of the above-mentioned embodiment one, the difference between the present embodiment and embodiment one is that the matching portion 121 is uniformly distributed with a plurality of elastic sheets 122 along the circumference thereof, the clamping portion 320 is provided with a protrusion 322 on the side surface, and the elastic sheet 122 can be clamped and matched with the protrusion 322.

[0049] In the present embodiment, the elastic sheet 122 is a wave-shaped stepped structure, when the protrusion 322 is clamped on the elastic sheet 122, the injection tube 100, the fitting claw 300 and the mesh bag 400 are connected as a whole, the tube 120 is in communication with the mesh bag 400 through the fitting claw 300, and the bone cement in the tube 120 can be injected into the mesh bag 400 under the action of the top rod 200. When it is needed to separate the injection tube 100 from the mesh bag 400, the rod 220 is pushed to move to the side of the fitting claw 300, and when the end of the rod 220 abuts against the elastic sheet 122, the plurality of elastic sheets 122 are separated from each other by being stretched, the protrusion 322 is no longer clamped with the elastic sheet 122, and the injection tube 100 is separated from the mesh bag 400, so that the mesh bag 400 containing the bone cement can be left in the vertebral body and the injection tube 100 can be recycled.

[0050] In the present embodiment, since the fixing portion 310 is a continuous cylindrical tubular structure, and the clamping portion 320 is arranged on the tube 120, when the tube 120 is separated from the mesh bag 400, the elastic sheet 122 is withdrawn from the vertebral body together with the tube 120, and therefore there is no sharp structure on the components of the fitting claw 300 left in the vertebral body together with the mesh bag 400, which effectively avoids causing secondary damage to the human body.

[0051] Embodiment three

[0052] Please refer to Figure 6 The embodiment provides a vertebral body implant, and the embodiment is improved on the basis of the technical solutions in the above-mentioned embodiment one and embodiment two, and the difference between the embodiment and the embodiment one and the embodiment two is that the fitting part 121 is provided with a clamping groove 123, the inner surface of the clamping groove 123 is communicated with the end surface of the fitting part 121, the clamping groove 123 is provided with a clamping groove 123, and the clamping groove 123 is provided with a clamping groove 123.

[0053] In the embodiment, two clamping grooves 123 are symmetrically arranged on the side surface of the fitting part 121, the clamping groove 123 is a key-shaped structure, two clamping strips 325 are arranged on the side surface of the fixing part 310 in a matched mode, and the clamping strip 325 is a key-shaped structure. When the pipe body 120 needs to be connected with the mesh bag body 400, the clamping grooves 123 are connected with the corresponding clamping strips 325 in a matched mode respectively, the elongated part of the clamping groove 123 can be expanded by the clamping strip 325, finally, the clamping groove 123 is tightly matched with the clamping strip 325, and the mesh bag body 400 and the injection pipe 100 are prevented from being separated in the process of injecting bone cement. When the pipe body 120 needs to be separated from the mesh bag body 400, the rod body 220 is moved in the pipe body 120, so that the end part of the rod body 220 separates the clamping strip 325 from the clamping groove 123, that is, the fixing part 310 and the fitting part 121 are away from each other, so that the injection pipe 100 and the mesh bag body 400 are completely separated, the mesh bag body 400 containing bone cement is left in the vertebral body, and the injection pipe 100 is recycled.

[0054] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0055] Although the embodiments of the application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the application.

Claims

1. A vertebral body implant device, comprising: The injection tube, the ejector rod, the fitting claw and the bag body are included, the ejector rod is arranged in the injection tube, one end of the fitting claw is connected with the bag body, the other end of the fitting claw is clamped with the injection tube, the injection tube and the bag body are communicated through the fitting claw, and the ejector rod is used for separating the fitting claw and the injection tube which are clamped with each other; The fitting claw includes a fixed part and a clamping part, the fixed part is fixedly connected with the opening of the bag body, one end of the injection tube is provided with a matching part, and the clamping part can be clamped and matched with the matching part. The injection tube includes a first handle and a tube body, the first handle is connected with one end of the tube body, and the other end of the fitting claw is clamped with the other end of the tube body away from the first handle.

2. The vertebral body insertion device according to claim 1, wherein, The clamping part is a resilient structure.

3. The vertebral body insertion device according to claim 2, wherein, The ejector rod is provided with a groove near the end face of the fitting claw, the groove can extrude and deform the clamping part, so that the fitting claw is separated from the injection tube.

4. The vertebral body insertion device according to claim 2, wherein, The clamping part is a clamping claw, the matching part is a step structure, and the clamping claw can be matched and connected with the matching part.

5. The vertebral body insertion device according to claim 4, wherein, The fixed part is provided with a plurality of clamping claws which are uniformly installed on the end face away from the bag body in the circumferential direction.

6. The vertebral body insertion device according to claim 1, wherein, The matching part is provided with elastic sheets, the clamping part is provided with protrusions, and the elastic sheets can be clamped and matched with the protrusions.

7. The vertebral body insertion device according to claim 6, wherein, The matching part is provided with a plurality of elastic sheets which are uniformly distributed in the circumferential direction.

8. The vertebral body insertion device according to claim 1, wherein, The matching part is provided with a clamping groove, the inner surface of the clamping groove is communicated with the end face of the matching part, the clamping part is provided with a clamping strip, and the clamping groove can be matched and connected with the clamping strip.

9. The vertebral body insertion device according to claim 1, wherein, The ejector rod includes a second handle and a rod body, the second handle is arranged at one end of the rod body, and the other end of the rod body is arranged in the tube body.

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