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Medical femoral head extractor

A femoral head and extractor technology, applied in the field of medical devices, can solve problems such as inability to achieve, and achieve the effects of convenient operation, reduced extraction difficulty, and simple structure

Active Publication Date: 2015-04-29
欧阳晓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Publication number is CN103876810A Medical femoral head head removal device, described in the natural paragraph 0007 of its manual, "When in use, insert the tines at the front end of the sleeve into the surface of the femoral head to obtain a holding force on the femoral head and prevent the femoral head from rotating. , "In actual operation, due to the high bone hardness of the femoral head, it is difficult to insert the tines into the surface of the femoral head without additional pressure, that is, it is impossible to achieve

Method used

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Examples

Experimental program
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Embodiment 1

[0017] Such as figure 1 with figure 2 In the embodiment shown, a medical femoral head extractor includes a connecting rod 2. One end of the connecting rod is a handle 3, and the other end is a self-tapping threaded head 1 integrated with the connecting rod. A self-tapping threaded head is provided on the connecting rod. Auxiliary clamping and fixing mechanism 4; the auxiliary clamping and fixing mechanism is a cross structure with four rods extending outwards centered on the connecting rod, and is an integral structure with the connecting rod 2; the four rods of the auxiliary clamping and fixing mechanism The upper and lower end faces are flat; the outer ends of the 4 rods of the cross structure are each provided with a threaded hole 4.2. It also includes a threaded locking screw 4.3 that cooperates with the threaded hole 4.2, and the locking screw is screwed into the femoral head through the threaded hole 4.2 to hold the femoral head and prevent it from rotating.

Embodiment 2

[0019] Such as image 3 with Figure 4 As shown in another embodiment, a medical femoral head extractor includes a connecting rod 2. One end of the connecting rod is a handle 3, and the other end is a self-tapping threaded head 1 integrated with the connecting rod 2, above the self-tapping threaded head An auxiliary clamping and fixing mechanism 4 is provided; the auxiliary clamping and fixing mechanism is detachably connected to the connecting rod 2. The auxiliary clamping and fixing mechanism is a flat cross structure, and a mounting hole 4.1 is opened at the center of the connecting rod. The auxiliary clamping and fixing mechanism 4 is sleeved through the mounting hole 4.1 and fixed on the connecting rod 2 to be detachably connected to the connecting rod.

[0020] In this embodiment, at least two threaded through holes 2.1 arranged up and down are opened above the self-tapping threaded head on the connecting rod 2 for adjusting the upper and lower positions of the auxiliary cla...

Embodiment 3

[0023] Such as Figure 5 As shown in another embodiment, the auxiliary clamping and fixing mechanism is a flat cross structure with a mounting hole matching the connecting rod at its center position. The mounting hole has a vertical upward inner diameter and a mounting tube 5 matching the connecting rod. The pipe wall of the pipe 5 is provided with two symmetrical threaded holes. The connecting rod 2 has at least two threaded through holes arranged up and down above the self-tapping threaded head. The auxiliary clamping and fixing mechanism is sleeved on the connecting rod. On the upper side, the auxiliary clamping and fixing mechanism is fixed on the connecting rod 2 through the screws passing through the threaded holes on the mounting pipe 5 and the threaded through holes on the connecting rod.

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Abstract

The invention discloses a medical femoral head extractor and belongs to the field of medical instruments for orthopedic operation. The medical femoral head extractor is suitable for clinical orthopedic artificial hip joint replacement operation and comprises a connecting rod, a handle is arranged at one end of the connecting rod, a self-tapping threaded head integrally formed with the connecting rod is arranged at the other end of the connecting rod, an auxiliary clamping fixing mechanism is arranged above the self-tapping threaded head on the connecting rod and is of a cross structure extending out by taking the connecting rod as the center, and a threaded hole is formed in each of four rods of the cross structure. When the medical femoral head extractor is in use, a pointed end of the self-tapping threaded head penetrates the section of a femoral neck, the self-tapping threaded head is rotated into a cancellous bone by pressurizing, locking screws are enabled to pass the threaded holes in the cross structure to be screwed into a femoral head, and then the handle is lifted to extract the femoral head. The medical femoral head extractor is simple in structure, convenient to operate and free of damaging acetabulums, difficulty in extracting the femoral head can be lowered effectively, operating time can be reduced, and smoothness in operation can be guaranteed.

Description

Technical field [0001] The invention belongs to the technical field of medical devices, and particularly relates to a medical femoral head extractor. Mainly used in clinical orthopedics artificial hip replacement surgery. Background technique [0002] At present, artificial total hip replacement and artificial femoral head replacement are the most effective methods for the treatment of end-stage hip joint disease. During the operation, the diseased femoral head needs to be removed and an artificial hip joint is implanted. Because the diseased femoral head is protected by surrounding soft tissues and ligaments, coupled with hyperplasia and hardening, it is often difficult to remove the diseased femoral head during the operation. [0003] In the prior art, doctors usually use a spiral head remover similar to screwing a screw into the cancellous bone of the femoral head, and then pull the handle to take out the femoral head. In order to hold the femoral head and prevent it from rota...

Claims

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Application Information

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IPC IPC(8): A61B17/00
CPCA61B17/1668A61B17/56A61B2017/564
Inventor 欧阳晓
Owner 欧阳晓
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