Bone cement gun for elbow joint replacement

Abstract

The utility model discloses a bone cement gun used in elbow joint replacement, which comprises a main body assembly, a bone cement gun body and a bone cement gun head, and is characterized in that the main body assembly comprises a bone cement gun body; the fixing assembly comprises a first fixing plate, a first threaded rod, a first bearing, a first clamping block and a second fixing plate; the first fixing plate is fixed to one side of the outer surface of the bone cement gun body, the first threaded rod penetrates through the middle of one side of the outer surface of the first fixing plate, the first bearing is installed on one side of the outer surface of the first threaded rod, the first clamping block is installed on one side of the outer surface of the first threaded rod, and the second fixing plate is fixed to the other side of the outer surface of the bone cement gun body. A second threaded rod is fixed to one side of the outer surface of the second fixing plate. The fixing structure has the advantages that under the connection of the first bearing and the second bearing, the first clamping block and the second clamping block synchronously move towards the middle to clamp and fix the extrusion container, the stability of the whole fixing structure is enhanced, and the risk of misoperation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a bone cement gun used in elbow replacement surgery. Background Art

[0002] Total elbow replacement is mainly suitable for patients with rheumatoid arthritis, osteoarthritis, traumatic arthritis, elbow instability caused by elbow bone defects, malformed healing of elbow fractures and other elbow surgery failures. It can relieve joint pain and improve joint functional activities. However, aseptic loosening of the prosthesis after surgery has always been a problem that troubles surgeons, and the clinical installation method is a mechanical factor that causes the prosthesis to loosen. After the trial mold is placed during the operation and the prosthesis is confirmed to be in a good position through X-ray fluoroscopy, the ulnar and humeral prostheses need to be fixed with bone cement.

[0003] The existing extrusion barrel is a key component in the bone cement gun responsible for pushing the bone cement outward for injection. If the extrusion barrel is installed unstably, it will cause uneven injection of bone cement or failure to inject normally, which will not only waste medicine but also may affect the treatment effect. Therefore, it is necessary to provide a bone cement gun with an extrusion barrel that can be stably installed. Utility Model Content

[0004] The purpose of the utility model is to provide a bone cement gun for use in elbow replacement surgery to solve the problem raised in the above-mentioned background technology that the existing extrusion cylinder is a key component in the bone cement gun responsible for pushing the bone cement to be injected outward, and the extrusion cylinder is installed unstably, which will lead to uneven injection of bone cement or failure to inject normally, which will not only waste medicine but also may affect the treatment effect.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a bone cement gun used in elbow replacement surgery, comprising:

[0007] A main body component, the main body component comprising a bone cement gun body;

[0008] A fixing assembly, the fixing assembly comprising a first fixing plate, a first threaded rod, a first bearing, a first clamping block, and a second fixing plate;

[0009] The first fixing plate is fixed to one side of the outer surface of the bone cement gun body, the first threaded rod passes through the middle part of one side of the outer surface of the first fixing plate, the first bearing is installed on one side of the outer surface of the first threaded rod, the first clamping block is installed on one side of the outer surface of the first threaded rod, and the second fixing plate is fixed to the other side of the outer surface of the bone cement gun body.

[0010] Furthermore, a push rod runs through the bone cement gun body, a pressure handle is fixed to the lower surface of the bone cement gun body, an extrusion cylinder is installed inside the bone cement gun body, and a feed pipe is connected to one side of the outer surface of the extrusion cylinder.

[0011] Furthermore, a second threaded rod is fixed to one side of the outer surface of the second fixing plate, a second bearing is installed on one side of the outer surface of the second threaded rod, and one side of the outer surface of the second threaded rod is installed on one side of the outer surface of the second clamping block. The first fixing plate is penetrated by a limiting rod on one side of the outer surface of the second fixing plate.

[0012] Furthermore, two limit rods are provided, which respectively penetrate the upper and lower sides of the first fixing plate and the second fixing plate, and the first clamp block and the second clamp block penetrate the limit rods, and one side of the outer surface of the first clamp block and the second clamp block contacts the extrusion cylinder.

[0013] Further, it also includes a support assembly;

[0014] The support assembly includes a connecting plate, a mounting groove, a gear shaft, a support rod, and a bottom plate;

[0015] The connecting plate passes through the outer surface of the extrusion cylinder, the mounting groove is opened on one side of the outer surface of the connecting plate, the gear shaft is installed inside the mounting groove, the support rod passes through the outer surface of the gear shaft, and the bottom plate is fixedly connected to one side of the outer surface of the support rod.

[0016] Furthermore, the base plate contacts the patient's skin, and the support rod rotates on the outer surface of the latching gear shaft.

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] 1. The utility model, through the first fixing plate, the first threaded rod, the first bearing, the first clamping block, the second fixing plate, the limiting rod, the second threaded rod, the second bearing, and the second clamping block, when installing the extrusion cylinder, the medical staff first sleeves one side of the extrusion cylinder into the interior of the bone cement gun body, and then holds the first threaded rod and the second threaded rod, and rotates the first threaded rod and the second threaded rod. Under the connection of the first bearing and the second bearing, the first clamping block and the second clamping block move synchronously toward the middle to clamp and fix the extrusion cylinder, thereby enhancing the stability of the entire fixing structure and reducing the risk of operational errors;

[0019] 2. Based on beneficial effect 1, by setting the connecting plate, mounting groove, gear shaft, support rod and base plate, before injecting bone cement, the medical staff rotates the support rod on the outer surface of the gear shaft according to the patient's body shape. When it reaches the required position, the staff will stick the base plate against the patient's skin and stick tape between the base plate and the patient's skin surface to avoid displacement when injecting bone cement. By sticking the base plate close to the patient's skin and fixing it with tape, the operation interruption or inaccurate injection caused by equipment movement during bone cement injection can be effectively prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the main components of the utility model;

[0022] Figure 2 Schematic diagram of the fixing components of the utility model Figure 1 ;

[0023] Figure 3 Schematic diagram of the fixing components of the utility model Figure 2 ;

[0024] Figure 4 This is a structural diagram of the support assembly of the utility model.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 11. Bone cement gun body; 12. Push rod; 13. Press handle; 14. Extrusion cylinder; 15. Feeding tube;

[0027] 21. first fixing plate; 22. first threaded rod; 23. first bearing; 24. first clamping block; 25. limiting rod; 26. second fixing plate; 27. second threaded rod; 28. second bearing; 29. ​​second clamping block;

[0028] 31. Connecting plate; 32. Mounting groove; 33. Gear shaft; 34. Support rod; 35. Bottom plate. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0032] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] See also Figure 1-Figure 3 As shown, this embodiment is a bone cement gun used in elbow replacement surgery, comprising:

[0034] A main body component, the main body component includes a bone cement gun body 11;

[0035] A push rod 12 is inserted into the bone cement gun body 11, a pressure handle 13 is fixed to the lower surface of the bone cement gun body 11, an extrusion cylinder 14 is installed inside the bone cement gun body 11, and a feed pipe 15 is connected to one side of the outer surface of the extrusion cylinder 14;

[0036] The push rod 12 is usually a long rod, the size of which matches the inner diameter of the bone cement gun body 11 so that it can slide smoothly in the ring. The pressure handle 13 is the main interface for medical staff to operate the bone cement gun. By pressing and pulling the pressure handle 13, the push rod 12 can be driven to move, thereby realizing the injection control of the bone cement in the extrusion cylinder 14;

[0037] A fixing assembly, the fixing assembly includes a first fixing plate 21, a first threaded rod 22, a first bearing 23, a first clamping block 24, and a second fixing plate 26;

[0038] The first fixing plate 21 is fixed to one side of the outer surface of the bone cement gun body 11, the first threaded rod 22 passes through the middle of one side of the outer surface of the first fixing plate 21, the first bearing 23 is installed on one side of the outer surface of the first threaded rod 22, the first clamping block 24 is installed on one side of the outer surface of the first threaded rod 22, and the second fixing plate 26 is fixed to the other side of the outer surface of the bone cement gun body 11;

[0039] The first fixing plate 21 is generally a planar plate-like structure having a certain thickness and area so as to be fixed on the bone cement gun body 11. The first threaded rod 22 passes through the first fixing plate 21 and the position of the first clamping block 24 is adjusted by rotation.

[0040] A second threaded rod 27 is fixed to one side of the outer surface of the second fixing plate 26, a second bearing 28 is installed to one side of the outer surface of the second threaded rod 27, and one side of the outer surface of the second threaded rod 27 is installed to one side of the outer surface of the second clamping block 29. The first fixing plate 21 passes through the limiting rod 25 due to one side of the outer surface of the second fixing plate 26;

[0041] The outer rings of the first bearing 23 and the second bearing 28 are fixed to the outer surfaces of the first clamping block 24 and the second clamping block 29. The second threaded rod 27 is installed on the second fixing plate 26. The position of the second clamping block 29 can be adjusted by rotation. The function of the limiting rod 25 is to limit the movement of the first clamping block 24 and the second clamping block 29.

[0042] Working principle:

[0043] When installing the extrusion cylinder 14;

[0044] First, the medical staff inserts one side of the extrusion cylinder 14 into the bone cement gun body 11;

[0045] Next, the medical staff holds the first threaded rod 22 and the second threaded rod 27 again, and rotates the first threaded rod 22 and the second threaded rod 27;

[0046] Under the connection between the first bearing 23 and the second bearing 28, the first clamping block 24 and the second clamping block 29 move synchronously toward the middle to clamp and fix the extrusion cylinder 14;

[0047] This step enhances the stability of the entire fixed structure and reduces the risk of operational errors.

[0048] See also Figure 4 As shown, this embodiment is based on the above embodiment 1 and also includes:

[0049] Support components;

[0050] The support assembly includes a connecting plate 31, a mounting groove 32, a latch shaft 33, a support rod 34, and a bottom plate 35;

[0051] The connecting plate 31 passes through the outer surface of the extrusion cylinder 14, the mounting groove 32 is provided on one side of the outer surface of the connecting plate 31, the latch gear shaft 33 is installed inside the mounting groove 32, the support rod 34 passes through the outer surface of the latch gear shaft 33, and the bottom plate 35 is fixedly connected to one side of the outer surface of the support rod 34;

[0052] The connecting plate 31 is generally a plate-like structure with sufficient strength and rigidity. The mounting groove 32 is a groove formed on one side of the outer surface of the connecting plate 31 to accommodate the latch gear shaft 33. The support rod 34 passes through the outer surface of the latch gear shaft 33 and cooperates with the latch gear shaft 33 to achieve stable support for the entire support assembly.

[0053] Working principle:

[0054] Before it is injected with bone cement;

[0055] First, the medical staff rotates the support rod 34 on the outer surface of the gear shaft 33 according to the patient's body shape;

[0056] When the desired position is reached, the staff places the bottom plate 35 against the patient's skin and tapes the bottom plate 35 and the patient's skin surface to prevent displacement when injecting bone cement;

[0057] In this step, the bottom plate 35 is placed close to the patient's skin and fixed with tape, which can effectively prevent the operation from being interrupted or the injection from being inaccurate due to the movement of the device when injecting the bone cement.

[0058] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A bone cement gun for use in elbow replacement surgery, characterized in that: include: A main body component, the main body component comprising a bone cement gun body (11); A fixing assembly, the fixing assembly comprising a first fixing plate (21), a first threaded rod (22), a first bearing (23), a first clamping block (24), and a second fixing plate (26); The first fixing plate (21) is fixed to one side of the outer surface of the bone cement gun body (11), the first threaded rod (22) passes through the middle of one side of the outer surface of the first fixing plate (21), the first bearing (23) is mounted on one side of the outer surface of the first threaded rod (22), the first clamping block (24) is mounted on one side of the outer surface of the first threaded rod (22), and the second fixing plate (26) is fixed to the other side of the outer surface of the bone cement gun body (11).

2. A bone cement gun for use in elbow replacement surgery according to claim 1, characterized in that: A push rod (12) passes through the bone cement gun body (11), a pressure handle (13) is fixed to the lower surface of the bone cement gun body (11), an extrusion cylinder (14) is installed inside the bone cement gun body (11), and a feed pipe (15) is connected to one side of the outer surface of the extrusion cylinder (14).

3. A bone cement gun for use in elbow replacement surgery according to claim 2, characterized in that: A second threaded rod (27) is fixed to one side of the outer surface of the second fixing plate (26), a second bearing (28) is mounted to one side of the outer surface of the second threaded rod (27), and one side of the outer surface of the second threaded rod (27) is mounted on one side of the outer surface of the second clamping block (29). The first fixing plate (21) is connected to one side of the outer surface of the second fixing plate (26), and a limiting rod (25) passes through one side of the outer surface of the second fixing plate (26).

4. A bone cement gun for use in elbow replacement surgery according to claim 3, characterized in that: Two limit rods (25) are provided, respectively penetrating the upper and lower sides of the first fixing plate (21) and the second fixing plate (26), and the first clamping block (24) and the second clamping block (29) penetrate the limit rods (25), and one side of the outer surface of the first clamping block (24) and the second clamping block (29) contacts the extrusion cylinder (14).

5. A bone cement gun for use in elbow replacement surgery according to claim 2, characterized in that: Also included is a support assembly; The support assembly comprises a connecting plate (31), a mounting groove (32), a latching gear shaft (33), a support rod (34), and a bottom plate (35); The connecting plate (31) passes through the outer surface of the extrusion cylinder (14); the mounting groove (32) is formed on one side of the outer surface of the connecting plate (31); the latching gear shaft (33) is mounted inside the mounting groove (32); the support rod (34) passes through the outer surface of the latching gear shaft (33); and the bottom plate (35) is fixedly connected to one side of the outer surface of the support rod (34).

6. A bone cement gun for use in elbow replacement surgery according to claim 5, characterized in that: The bottom plate (35) contacts the patient's skin, and the support rod (34) rotates on the outer surface of the latching gear shaft (33).

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