Tibia unicondylar prosthesis holderTechnical Field
The invention relates to the technical field of medical appliances, in particular to a tibial unicondylar prosthesis holder.
Background
In the knee unicondylar replacement operation, a femoral unicondylar prosthesis and a tibial unicondylar prosthesis are required to be respectively implanted.
When implanting the tibial unicondylar prosthesis, the operator needs to clamp the tibial unicondylar prosthesis with a tibial unicondylar prosthesis holder and place the tibial unicondylar prosthesis in place. Although the existing tibial unicondylar prosthesis holder can clamp the clamping groove on the side surface of the tibial unicondylar prosthesis through the clamp head, in actual operation, the following problems still exist:
(1) The clamp head clamps the clamping groove on the side surface of the tibial unicondylar prosthesis, so that the tibial unicondylar prosthesis is stressed transversely, but the tibial unicondylar prosthesis is not stressed longitudinally, and is easy to generate longitudinal deflection when encountering bones or other instruments in the operation process, thereby increasing the operation difficulty.
(2) As shown in fig. 6, when the existing tibial unicondylar prosthesis holder clamps the tibial unicondylar prosthesis, the holder is used for clamping the clamping groove on the cambered surface of the prosthesis, wherein an included angle exists between the axial surface and the side plane of the prosthesis, visual inconvenience and operation inconvenience are brought to operators, and the operation difficulty is further increased.
(3) When the tibial unicondylar prosthesis is implanted, the operator completely depends on the force of the handheld handle to send the tibial unicondylar prosthesis to the appointed position, and the tibial unicondylar prosthesis is often sent to the appointed position due to the resistance of peripheral tissues and bone sections, so that the operator is difficult to send the tibial prosthesis to the appointed position.
In order to reduce the difficulty of knee joint unicondylar replacement operation, improve the success rate of the operation and save the time and energy of operators, a novel tibia unicondylar prosthesis holder is urgently needed.
Disclosure of Invention
In order to solve the problems, the invention provides a tibial unicondylar prosthesis holder.
The technical scheme of the invention is as follows: a tibia unicondylar prosthesis holder comprises a push rod, wherein one side of the push rod is movably connected with a movable rod; the push rod comprises a knocking block arranged at one end and a connecting block arranged at the other end; one end of the connecting block is provided with an arc surface, and one side of the arc surface is provided with a fixed claw; a first clamping block is arranged below the cambered surface; the connecting block is also provided with a movable claw; the movable rod comprises a connecting part, and a second clamping block is arranged at one end of the connecting part; the other end is provided with a handle.
Further, a first groove is formed in one side of the push rod; the movable rod is movably connected in the first groove.
Further, the movable claw comprises a screw rod and a claw which are connected with each other; one end of the hook claw is provided with a claw head.
Further, an inclined hole is formed in the connecting block, and the screw is arranged in the inclined hole.
Further, a clamping groove is formed in the inclined hole, a clamping pin is arranged on the screw rod, and the clamping groove is matched with the clamping pin.
Further, a second groove is formed in the other side of the push rod; and a nut is arranged in the second groove, and the nut is matched with the screw rod.
Further, a first elastic pad is arranged below the second clamping block.
Further, a second elastic pad is arranged on one side of the cambered surface.
The holder for the tibial unicondylar prosthesis is simple in structure and convenient to use, the tibial unicondylar prosthesis is transversely clamped by the cooperation of the fixed claw and the movable claw, and then the tibial unicondylar prosthesis is longitudinally clamped by the cooperation of the first clamping block and the second clamping block, so that the problem that the prosthesis is easy to longitudinally deviate when the traditional holder is used is solved; through the design of the push rod and the knocking block, a worker can knock the holder by using a tool at the knocking block, so that the problem that the prosthesis is difficult to be placed in a designated position by the traditional holder is solved; the parameters of the fixed claw and the cambered surface are calculated, so that when the tibial unicondylar prosthesis is installed on the invention, the lateral plane of the prosthesis is parallel to the medial axis of the invention, thereby bringing convenience to the operator in vision and operation and further reducing the operation difficulty.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged view of a partial structure of the present invention;
FIG. 3 is a schematic view of a mobile claw relaxing tibial unicondylar prosthesis model;
FIG. 4 is a schematic view of a moveable jaw clamping tibial unicondylar prosthesis model;
FIG. 5 is a schematic view of the structure of the medial axis surface of the present invention parallel to the prosthetic side plane of the tibial unicondylar prosthetic model;
Fig. 6 is a schematic structural view of a tibial unicondylar prosthetic model.
In the figure, a push rod-1, a movable rod-2 and a tibial unicondylar prosthesis model-3; the device comprises a knocking block-1.1, a connecting block-1.2, an arc surface-1.3, a fixed claw-1.4, a first clamping block-1.5, a movable claw-1.6, a first groove-1.7 and a second spring pad-1.8; the connecting part is 2.1, the second clamping block is 2.2, the handle is 2.3, and the first elastic pad is 2.4; a first clamping groove-3.1, a second clamping groove-3.2, a prosthesis cambered surface-3.3 and a prosthesis side plane-3.4; inclined hole-1.2.1, clamping groove-1.2.2, screw-1.6.1, claw-1.6.2, claw-1.6.3, clamping pin-1.6.4 and nut-1.6.5.
Detailed Description
A tibial unicondylar prosthetic holder according to the present invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a tibial unicondylar prosthesis holder comprises a push rod 1, wherein one side of the push rod 1 is movably connected with a movable rod 2; the push rod 1 comprises a knocking block 1.1 arranged at one end and a connecting block 1.2 arranged at the other end; one end of the connecting block 1.2 is provided with an arc surface 1.3, one side of the cambered surface 1.3 is provided with a fixed claw 1.4; a first clamping block 1.5 is arranged below the cambered surface 1.3; the connecting block 1.2 is also provided with a movable claw 1.6; the movable rod 2 comprises a connecting part 2.1, and a second clamping block 2.2 is arranged at one end of the connecting part 2.1; the other end is provided with a handle 2.3; a first groove 1.7 is arranged on one side of the push rod 1; the movable rod 2 is movably connected in the first groove 1.7; the movable claw 1.6 comprises a screw rod 1.6.1 and a hook claw 1.6.2 which are connected with each other; one end of the hook claw 1.6.2 is provided with a claw head 1.6.3; the connecting block 1.2 is provided with an inclined hole 1.2.1, and the screw rod 1.6.1 is arranged in the inclined hole 1.2.1; the inclined hole 1.2.1 is internally provided with a clamping groove 1.2.2, the screw 1.6.1 is provided with a clamping pin 1.6.4, and the clamping groove 1.2.2 is matched with the clamping pin 1.6.4; the other side of the push rod 1 is provided with a second groove 1.8; a nut 1.6.5 is arranged in the second groove 1.8, and the nut 1.6.5 is matched with the screw 1.6.1; a first elastic pad 2.4 is arranged below the second clamping block 2.2; one side of the cambered surface 1.3 is provided with a second elastic pad 1.8.
In actual use, as shown in fig. 3, the operator firstly places the tibial unicondylar prosthesis model 3 on the first clamping block 1.5 of the invention, and attaches the cambered surface 3.3 of the prosthesis to the cambered surface 1.3, and the fixing claw 1.4 is embedded into the first clamping groove-3.1, at this time, because the parameters of the fixing claw 1.4 and the cambered surface 1.3 are calculated, when the tibial unicondylar prosthesis 3 is installed on the invention, the lateral plane 3.4 of the prosthesis is parallel to the medial axis of the invention (as shown in fig. 5), thereby bringing convenience for the operator in view and operation and further reducing the operation difficulty.
As shown in fig. 4, the operator rotates the nut 1.6.5 again to drive the screw 1.6.1 to move along the inclined hole 1.2.1, and further drive the hook 1.6.2 to move, so that the claw head 1.6.3 at the top end of the hook 1.6.2 abuts against the second clamping groove 3.2, thereby completing the transverse fixation of the tibial unicondylar prosthesis model 3.
Next, the operator presses the second clamping block 2.2 against the tibial unicondylar prosthesis model 3 by controlling the handle 2.3, and the second clamping block 2.2 and the first clamping block 1.5 fix the tibial unicondylar prosthesis model 3 longitudinally.
Finally, the operator can hold the tibial unicondylar prosthesis model 3 at a proper position of the knee joint by hand, and if the resistance generated by the bone section or the tissue is large during the process, the operator can strike the knocking block 1.1 by means of other tools to implant the tibial unicondylar prosthesis model 3 at the proper position.
The present invention is not limited to the preferred embodiments, and the present invention is described above in any way, but is not limited to the preferred embodiments, and any person skilled in the art will appreciate that the present invention is not limited to the embodiments described above, while the above disclosure is directed to various equivalent embodiments, which are capable of being modified or varied in several ways, it is apparent to those skilled in the art that many modifications, variations and adaptations of the embodiments described above are possible in light of the above teachings.