Medullary cavity filing impacting extraction device

Abstract

The invention discloses a medullary cavity filing impacting extraction device comprising a medullary cavity filing locking mechanism and an impacting extraction mechanism connected with the medullarycavity filing locking mechanism. The impacting extraction mechanism includes a handle body, a sleeve, a hammer body, and a first spring. The handle body and the main body structure of the medullary cavity filing locking mechanism are coaxially and fixedly connected. The sleeve has a hollow structure and is slidably arranged on the handle body in a sleeving mode; and the top face of the hollow structure and the top face of the handle body are arranged in a spaced mode. The hammer body is arranged on the sleeve in a sliding and sleeving manner. The first spring is coaxially arranged between thetop surface of the hollow structure and the top surface of the handle body; the two ends of the first spring are fixedly connected with the top surface of the hollow structure and the top surface of the handle body respectively. The hammer body can drive the sleeve to move in the axial direction of the handle body; and the medullary cavity file is driven and pulled under the action of restoring force of the first spring. According to the designed medullary cavity filing impacting extraction device, with the impacting extraction mechanism, the hammer body drives the sleeve to move in the axialdirection of the handle body and the medullary cavity file impacted and extracted under the restoring force effect of the first spring, so that the operation is easy and convenient.

Description

technical field [0001] The invention relates to the technical field of medical instruments, and more specifically, the invention relates to a medullary cavity file extractor. Background technique [0002] The medullary canal rasp is a tool used in hip replacement surgery. It can be used in conjunction with the medullary canal rasp to rasp the femoral medullary cavity for implantation of the femoral stem prosthesis. The working principle of the pulp cavity file puller is: when the locking handle of the pulp cavity file puller is in the locked state, the hook of the pulp cavity file puller is buckled with the groove of the head of the pulp cavity file , and the spring leaf at this time is in a bent state, and the pulp cavity file is locked under the action of the spring force of the spring leaf, such as figure 1 shown. [0003] The medullary canal file puller currently on the market can quickly disassemble and assemble the medullary canal file, but in the process of use, the...

AI Technical Summary

Problems solved by technology

[0003] The medullary canal file puller currently on the market can quickly disassemble and assemble the medullary canal file, but in the process of use, the connected medullary canal file needs to be rasped many times in the human femoral medullary canal to achieve the final implantation The size of the prosthesis, and the process of entering and removing the medullary canal file from the femoral medullary cavity of the human body often needs to be struck with a hammer. Due to one-sided percussion, it is easy to cause the pulp cavity file to deviate, causing additional damage to the human body

Furthermore, because the pulp cavity file puller and the hammer need to be operated by both hands at the same time, the convenience of operation is also very poor, especially when the pulp cavity file puller is knocked out, it is easy to cause injury to medical staff

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