Intervertebral bone grafting device

Abstract

The utility model discloses an intervertebral bone grafting device. The intervertebral bone grafting device comprises a cylinder body, a plugging piece and a piston, wherein the cylinder body is used for containing aggregate, the cylinder body is provided with a bone inlet and a bone outlet, the bone inlet and the bone outlet are arranged in a spaced mode in the axial direction of the cylinder body, and the bone outlet is formed in the circumferential side wall of the cylinder body; the blocking piece is used for blocking the bone outlet, the bone outlet comprises an opening state and a blocking state, and the blocking piece can move so that the bone outlet can be switched between the opening state and the blocking state; the piston can axially and movably penetrate through the barrel, one end of the piston is matched with the inner side wall of the barrel, and the piston is used for pushing aggregate. According to the intervertebral bone grafting device, the controllability of aggregate is better, and the accuracy and safety of the bone grafting process can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an intervertebral bone grafting device. Background Art

[0002] Spinal fusion is one of the most common surgeries in the neck or back. The principle is to fuse the painful or unstable bones in the spine together to form a hard bone. In order to fuse or heal the bones together, additional bones are required.

[0003] The most commonly used methods at home and abroad are to transplant autologous bone or allogeneic bone. When implanting these bone masses, they need to be bitten into bone granules and sent to the target position through a bone grafting device. At present, when the most commonly used bone grafting device in clinical practice needs to stop bone grafting, the bone aggregate will continue to fall under the action of gravity, with poor controllability, resulting in poor safety and accuracy during the bone grafting process. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide an intervertebral bone grafting device, which has better controllability of the bone aggregate and can improve the accuracy and safety of the bone grafting process.

[0005] The intervertebral bone grafting device according to the embodiment of the utility model includes a cylinder body, a blocking member and a piston. The cylinder body is used to accommodate the bone aggregate. The cylinder body has a bone inlet and a bone outlet. The bone inlet and the bone outlet are arranged at intervals along the axial direction of the cylinder body. The bone outlet is arranged on the circumferential side wall of the cylinder body. The blocking member is used to block the bone outlet. The bone outlet includes an open state and a blocked state. The blocking member can move to switch the bone outlet between the open state and the blocked state. The piston is axially movably inserted through the cylinder body and one end of the piston cooperates with the inner side wall of the cylinder body. The piston is used to push the bone aggregate.

[0006] For the intervertebral bone grafting device according to the embodiment of the utility model, on the one hand, by arranging the bone outlet on the circumferential side wall of the cylinder body, therefore, the size of the bone outlet can be set as large as possible, which is beneficial to reducing the possibility of the bone aggregate getting stuck in the bone outlet and increasing the smoothness of the bone grafting process. On the other hand, by arranging the blocking member, the blocking member can move to switch the bone outlet between the open state and the blocked state, thereby improving the controllability of the bone aggregate discharged from the bone outlet, reducing the problem of uncontrollable discharge of the bone aggregate, and being beneficial to improving the accuracy and safety of the bone grafting process.

[0007] According to some embodiments of the present utility model, the intervertebral bone grafting device further includes a push rod, the push rod is disposed through the piston and is axially movable relative to the piston, and two ends of the push rod are respectively disposed on two axial sides of the piston; the blocking member is connected to one end of the push rod, and the push rod is configured to drive the blocking member to move so as to switch the bone outlet between the open state and the blocked state.

[0008] According to some embodiments of the present utility model, the blocking member includes: an opening arm, the opening arm is rotatably connected to the cylinder body around a first axis; a connecting rod, two ends of the connecting rod are respectively hinged to the push rod and the opening arm, and hinge axes at two ends of the connecting rod are parallel to the first axis, and the first axis is perpendicular to a central axis of the cylinder body; the movement of the push rod drives the connecting rod to rotate, and the rotation of the connecting rod drives the opening arm to swing so as to open or block the bone outlet.

[0009] According to some embodiments of the present utility model, the push rod is provided with a guiding hole, the opening arm is rotatably connected to the cylinder body through a rotating shaft, and the rotating shaft is in sliding fit with the guiding hole.

[0010] According to some embodiments of the present utility model, the cylinder body is made of a light-transmitting material and is provided with a position mark, and the position mark is configured to indicate an axial position of one end of the piston.

[0011] According to some embodiments of the present utility model, an end of the cylinder body away from the bone inlet is an elastic material end.

[0012] According to some embodiments of the present utility model, the cylinder body includes a first section body and a second section body that are axially connected in sequence, the first section body and the second section body are detachably connected, the bone outlet is disposed on the first section body, and the other end of the piston extends out of an end of the second section body away from the first section body.

[0013] According to some embodiments of the present utility model, the bone inlet is disposed on a circumferential side wall of the cylinder body.

[0014] According to some embodiments of the present utility model, a long side of the bone outlet extends along the axial direction of the cylinder body.

[0015] According to some embodiments of the present utility model, the bone outlet is a rectangular bone outlet.

[0016] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0018] Figure 1 It is the first structural schematic diagram of the intervertebral bone grafting device according to an embodiment of the present utility model.

[0019] Figure 2 It is a perspective view of the intervertebral bone grafting device according to an embodiment of the present utility model.

[0020] Figure 3 It is the second structural schematic diagram of the intervertebral bone grafting device according to an embodiment of the present utility model.

[0021] Figure 4 It is an exploded view of the intervertebral bone grafting device according to an embodiment of the present utility model.

[0022] Figure 5 It is the structural schematic diagram of the cylinder body in an embodiment of the present utility model.

[0023] Figure 6 It is the structural schematic diagram of the piston and the push rod in an embodiment of the present utility model.

[0024] Figure 7 It is the structural schematic diagram of the plugging member in an embodiment of the present utility model, wherein it is shown that the opening arms contract to plug the bone outlet.

[0025] Figure 8 It is the structural schematic diagram of the plugging member in an embodiment of the present utility model, wherein it is shown that the opening arms expand to open the bone outlet.

[0026] Reference numerals:

[0027] Intervertebral bone grafting device 100;

[0028] Cylinder body 10;

[0029] Bone inlet 101; Bone outlet 102; Position mark 103; First section body 104; Second section body 105;

[0030] Plugging member 20;

[0031] Opening arms 201; Connecting rod 202; Rotating shaft 203;

[0032] Piston 30;

[0033] Push rod 40; Guide hole 401; First rod body 402; Second rod body 403. Detailed implementation manners

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] Unless otherwise defined, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs; the terms used in the description of the present utility model in the specification of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "including" and "having" and any variations thereof in the description of the present utility model in the specification and claims and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description of the present utility model in the specification and claims or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0036] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", and "attached to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] The term "and / or" in the present utility model is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present utility model generally represents an "or" relationship between the associated objects before and after.

[0038] In the embodiments of the present utility model, the same reference numerals represent the same components, and for the sake of simplicity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components shown in the drawings in the embodiments of the present utility model, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to the present utility model.

[0039] The "multiple" mentioned in the present utility model refers to two or more (including two).

[0040] The following combination Figures 1 to 8To describe the intervertebral bone grafting device 100 of the present utility model.

[0041] As Figure 1 and Figure 2 shown, the intervertebral bone grafting device 100 according to an embodiment of the present utility model includes a cylinder 10, a plugging member 20, and a piston 30. The cylinder 10 is used to accommodate bone aggregates. The cylinder 10 has a bone inlet 101 and a bone outlet 102. The bone inlet 101 and the bone outlet 102 are arranged at intervals along the axial direction of the cylinder 10. The bone outlet 102 is provided on the circumferential side wall of the cylinder 10. The plugging member 20 is used to plug the bone outlet 102. The bone outlet 102 includes an open state and a plugged state. The plugging member 20 can move to switch the bone outlet 102 between the open state and the plugged state. The piston 30 is axially movably inserted through the cylinder 10 and one end thereof cooperates with the inner side wall of the cylinder 10. The piston 30 is used to push the bone aggregates.

[0042] Specifically, when the intervertebral bone grafting device 100 of the present utility model is in use, first, the piston 30 is pulled to Figure 1 the rightmost end in

[0043] so that one end of the piston 30 is located on the side of the bone outlet 102 away from the bone inlet 101. Then, bone aggregates are loaded into the cylinder 10 through the bone inlet 101, and an appropriate amount of bone aggregates is loaded according to needs. In the open state of the bone outlet 102, the piston 30 can be pushed along the axial direction of the cylinder 10 so that the bone aggregates are pushed out from the bone outlet 102.

[0044] The present application further provides a blocking member 20. For example, the blocking member 20 can move axially to open and block the bone outlet 102, or the blocking member 20 can move circumferentially to open and block the bone outlet 102, or the blocking member 20 can expand or contract to open and block the bone outlet 102. When the bone aggregate needs to be discharged, the blocking member 20 is driven to move to open the bone outlet 102. When the bone aggregate no longer needs to be discharged, the blocking member 20 is driven to move to block the bone outlet 102. Therefore, the problem that the bone aggregate still falls under the action of gravity when the bone aggregate no longer needs to be discharged can be reduced. The discharge amount and discharge position of the bone aggregate are relatively controllable, so the accuracy and safety of the bone grafting process can be improved.

[0045] In the intervertebral bone grafting device 100 according to an embodiment of the present invention, on the one hand, by providing the bone outlet 102 on the circumferential side wall of the cylinder 10, therefore, the size of the bone outlet 102 can be set as large as possible, which is beneficial to reducing the possibility of the bone aggregate getting stuck in the bone outlet 102 and increasing the smoothness of the bone grafting process; on the other hand, by providing the blocking member 20, the blocking member 20 can move so that the bone outlet 102 can be switched between an open state and a blocked state, thereby improving the controllability of the bone aggregate discharged from the bone outlet 102, reducing the problem of uncontrollable discharge of the bone aggregate, and being beneficial to improving the accuracy and safety of the bone grafting process.

[0046] According to some embodiments of the present invention, reference may be made to Figure 2 and Figure 6 , the intervertebral bone grafting device 100 further includes a push rod 40. The push rod 40 passes through the piston 30 and is axially movable relative to the piston 30. The two ends of the push rod 40 are respectively located on both axial sides of the piston 30; the blocking member 20 is connected to one end of the push rod 40, and the push rod 40 is used to drive the blocking member 20 to move so that the bone outlet 102 can be switched between an open state and a blocked state.

[0047] The push rod 40 is axially movable relative to the piston 30, that is to say, the axial movement process of the push rod 40 and the axial movement process of the piston 30 do not interfere with each other. The piston 30 is only used to push the bone aggregate, and the push rod 40 is only used to drive the blocking member 20 to move. According to the actual situation, the push rod 40 can be coaxially arranged with the piston 30, or the central axis of the push rod 40 and the central axis of the piston 30 can also be parallel to each other but not coincident.

[0048] By providing the push rod 40 passing through the piston 30 to drive the blocking member 20 to move, the user can drive the push rod 40 to move by operating the other end of the push rod 40. The other end of the push rod 40 is the operating end. The user can drive the piston 30 to move by operating the other end of the piston 30. The other end of the piston 30 is the operating end. In this embodiment, the operating ends of the piston 30 and the push rod 40 are both on the same side, with low operation difficulty and more convenient operation.

[0049] More specifically, a sealing plug is provided at one end of the piston 30. For example, the sealing plug can be a rubber plug or a silica gel plug, so that there is a good fit between one end of the piston 30 and the inner side wall of the cylinder 10, and the aggregate is not easily stuck between one end of the piston 30 and the inner side wall of the cylinder 10. A handle ring can be formed at the other end of the piston 30, and the handle ring is arranged around the circumference of the piston 30, so that the operator can pull the piston 30 through the handle ring. A pulling part can be formed at the other end of the push rod 40, and the outer diameter of the pulling part is larger than the outer diameter of the push rod 40, so that the operator can pull the push rod 40 through the pulling part.

[0050] According to some embodiments of the present invention, as Figure 7 and Figure 8 shown, the blocking member 20 includes an opening arm 201 and a connecting rod 202. The opening arm 201 is rotatably connected to the cylinder 10 around a first axis; both ends of the connecting rod 202 are hinged to the push rod 40 and the opening arm 201 respectively, and the hinge axes at both ends of the connecting rod 202 are parallel to the first axis, and the first axis is perpendicular to the central axis of the cylinder 10; the movement of the push rod 40 drives the connecting rod 202 to rotate, and the rotation of the connecting rod 202 drives the opening arm 201 to swing to open or block the bone outlet 102.

[0051] Reference can be made to Figure 7 and Figure 8 shown, one end of the opening arm 201 is rotatably connected to the cylinder 10 through a rotating shaft 203, the middle part of the opening arm 201 is hinged to one end of the connecting rod 202, and the other end of the connecting rod 202 is hinged to the push rod 40. Reference can be made to Figure 7 , when the operator pushes the push rod 40 to the Figure 7 left side in the figure, the other end of the connecting rod 202 moves together with the push rod 40, and the radial distance between both ends of the connecting rod 202 increases. Therefore, driven by one end of the connecting rod 202, the opening arm 201 opens radially outward and switches to the Figure 8 state shown; similarly, reference can be made to Figure 8 , when the operator pulls the push rod 40 to the right side in the figure, the other end of the connecting rod 202 moves together with the push rod 40, and the radial distance between both ends of the connecting rod 202 decreases. Therefore, driven by one end of the connecting rod 202, the opening arm 201 swings radially inward and switches to the Figure 7 state shown.

[0052] It should be noted that in the Figure 7 state shown, part of the opening arm 201 is located in the bone outlet 102 to block the bone outlet 102, so that the aggregate cannot be discharged from the bone outlet 102. In the Figure 8 state shown, since the opening arm 201 expands outward, the bone outlet 102 can be opened, and the aggregate can be discharged from the bone outlet 102.

[0053] By providing a plugging member 20 including an opening arm 201 and a connecting rod 202 to plug the bone outlet 102 and to open the bone outlet 102, the opening and closing of the bone outlet 102 are smoother, the plugging member 20 is not easily dislodged by the aggregate, and the use effect is good.

[0054] In some embodiments, the push rod 40 includes a first rod body 402 and a second rod body 403 that are axially connected. One end of the opening arm 201 and the connecting rod 202 are both connected to the first rod body 402, and the second rod body 403 and the first rod body 402 are detachably connected, such as by screwing, to simplify the assembly of the push rod 40 and the plugging member 20.

[0055] According to some embodiments of the present invention, reference may be made to Figure 7 good Figure 8 , the push rod 40 is provided with a guide hole 401. The opening arm 201 is rotatably connected to the cylinder body 10 through a rotating shaft 203, and the rotating shaft 203 is in sliding fit with the guide hole 401. Specifically, the dimension of the guide hole 401 in the axial direction is greater than the dimension of the guide hole 401 in the radial direction.

[0056] That is to say, when the push rod 40 drives the connecting rod 202 to rotate, the guide hole 401 will slide relative to the rotating shaft 203. The rotating shaft 203 can only move within the axial extension range of the guide hole 401. Thus, the cooperation between the rotating shaft 203 and the guide hole 401 can limit the swing range of the opening arm 201, avoiding excessive swing of the opening arm 201 and problems such as poor plugging effect of the bone outlet 102 by the opening arm 201 and difficulty in controlling the opening degree of the bone outlet 102.

[0057] According to some embodiments of the present invention, as Figure 2 and Figure 5 shown, the cylinder body 10 is made of a light-transmitting material and is provided with a position mark 103 for indicating the axial position of one end of the piston 30.

[0058] The cylinder body 10 is made of a light-transmitting material. For example, the cylinder body 10 can be made of a transparent material, or the cylinder body 10 can also be made of a translucent material, so that the operator can observe the position of the piston 30 through the outer peripheral wall of the cylinder body 10.

[0059] The cylinder body 10 is provided with a position mark 103. For example, the position mark 103 can be uniformly arranged scale lines. Thus, the operator can judge the position of the piston 30 according to the corresponding scale line position of one end of the piston 30. For example, the operator can conveniently know the discharge amount of the aggregate according to the starting position of the piston 30 before pushing the aggregate and the final position of the piston 30 after pushing the aggregate, so as to facilitate the operator to adjust the bone grafting amount and improve the accuracy of the bone grafting amount.

[0060] According to some embodiments of the present invention, reference may be made to Figures 1 to 3, one end of the cylinder body 10 away from the bone inlet 101 is an elastic material end. Specifically, for example, the first section body 104 is an elastic material end.

[0061] It should be noted that during the operation, one end of the cylinder body 10 away from the bone inlet 101, that is, one end of the cylinder body 10 close to the bone outlet 102, needs to extend between the vertebrae. The shape between the vertebrae is complex and is an irregular space area. Therefore, by setting one end of the cylinder body 10 close to the bone outlet 102 as an elastic material end, the elastic material end can undergo elastic deformation to adapt to the complex space environment, which is beneficial to extending to a deeper position. At the same time, the elastic material end is not easy to cause damage to the spine and surrounding tissues, which is beneficial to reducing the occurrence of intraoperative complications.

[0062] According to some embodiments of the present invention, reference may be made to Figure 4 , the cylinder body 10 includes a first section body 104 and a second section body 105 connected in sequence along the axis. The first section body 104 and the second section body 105 are detachably connected. The bone outlet 102 is provided on the first section body 104. The other end of the piston 30 extends out of one end of the second section body 105 away from the first section body 104. The bone inlet 101 is provided on the second section body 105.

[0063] In this way, on the one hand, the first section body 104 and the second section body 105 can be separately formed. For example, the first section body 104 is an elastic material part, and the second section body 105 is a rigid plastic part to meet more usage requirements; on the other hand, after the first section body 104 and the second section body 105 are combined, a cylinder body 10 with a longer size can be formed. While facilitating processing, the axial dimension of the cylinder body 10 can also be longer, and the cylinder body 10 can extend to a deeper position to better meet the usage requirements. For example, the first section body 104 and the second section body 105 are threadedly connected.

[0064] According to some embodiments of the present invention, as Figures 2 to 4 , the bone inlet 101 is provided on the circumferential side wall of the cylinder body 10.

[0065] In this way, on the one hand, the aggregate can be filled into the cylinder body 10 through the bone inlet 101 provided on the circumferential side wall of the cylinder body 10 without separating the piston 30 and the cylinder body 10, which is more convenient to use; on the other hand, when feeding the aggregate, it can be fed from the side, and the operation is also smoother.

[0066] According to some embodiments of the present invention, as Figure 1 shown, the long side of the bone outlet 102 extends along the axis of the cylinder body 10.

[0067] That is to say, the bone outlet 102 includes a long side with a longer length and a short side with a shorter length. Among them, the long side extends along the axis. In this way, the size of the bone outlet 102 can be larger, and the influence on the structural strength of the cylinder 10 is smaller.

[0068] According to some embodiments of the present invention, as Figure 1 shown, the bone outlet 102 is a rectangular bone outlet 102. The long side of the rectangular bone outlet 102 extends along the axial direction of the cylinder 10. When discharging the bone material, the bone material is not easily stuck, and the use effect is better.

[0069] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An intervertebral bone grafting device, characterized in that, Comprising: A cylinder body (10) for accommodating aggregates, having an aggregate inlet (101) and an aggregate outlet (102), the aggregate inlet (101) and the aggregate outlet (102) being arranged at intervals along the axial direction of the cylinder body (10), and the aggregate outlet (102) being provided on the circumferential side wall of the cylinder body (10); A blocking member (20) for blocking the aggregate outlet (102), the aggregate outlet (102) having an open state and a blocked state, and the blocking member (20) being movable to switch the aggregate outlet (102) between the open state and the blocked state; A piston (30) axially movably penetrating through the cylinder body (10) and having one end in cooperation with the inner side wall of the cylinder body (10), the piston (30) being used for pushing the aggregates.

2. The intervertebral bone grafting device according to claim 1, characterized in that, Further comprising a push rod (40) axially movably penetrating through the piston (30) and relative to the piston (30), with both ends of the push rod (40) being disposed on both axial sides of the piston (30); the blocking member (20) is connected to one end of the push rod (40), and the push rod (40) is used for driving the blocking member (20) to move so as to switch the aggregate outlet (102) between the open state and the blocked state.

3. The intervertebral bone grafting device according to claim 2, characterized in that, The blocking member (20) includes: An opening arm (201) rotatably connected to the cylinder body (10) about a first axis; A connecting rod (202) with both ends respectively hinged to the push rod (40) and the opening arm (201), the hinge axes at both ends of the connecting rod (202) being parallel to the first axis, and the first axis being perpendicular to the central axis of the cylinder body (10); The movement of the push rod (40) drives the connecting rod (202) to rotate, and the rotation of the connecting rod (202) drives the opening arm (201) to swing to open or block the aggregate outlet (102).

4. The intervertebral bone grafting device according to claim 3, wherein, The push rod (40) is provided with a guiding hole (401), and the opening arm (201) is rotatably connected to the cylinder body (10) through a rotating shaft (203), and the rotating shaft (203) is in sliding fit with the guiding hole (401).

5. The intervertebral bone grafting device according to claim 1, wherein The cylinder body (10) is made of a light-transmitting material and is provided with a position mark (103) for indicating the axial position of one end of the piston (30).

6. The intervertebral bone grafting device according to claim 1, characterized in that, One end of the cylinder body (10) far from the aggregate inlet (101) is an elastic material end.

7. The intervertebral bone grafting device according to claim 1, characterized in that, The cylinder body (10) includes a first section body (104) and a second section body (105) axially connected in sequence, the first section body (104) and the second section body (105) being detachably connected, the aggregate outlet (102) being provided on the first section body (104), and the other end of the piston (30) extending out of one end of the second section body (105) far from the first section body (104).

8. The intervertebral bone grafting device according to claim 1, characterized in that, The aggregate inlet (101) is provided on the circumferential side wall of the cylinder body (10).

9. The intervertebral bone grafting device according to claim 1, characterized in that, The long side of the bone outlet (102) extends along the axial direction of the cylinder body (10).

10. The intervertebral bone grafting device according to claim 1, wherein The bone outlet (102) is a rectangular bone outlet.

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