Universal prosthetic femoral stem extractor

Abstract

The invention discloses an orthopedic medical instrument, and particularly discloses a universal prosthetic femoral stem extractor used for revision of hip arthroplasty. The universal prosthetic femoral stem extractor comprises a body and a handle slidably arranged thereon. A universal joint is arranged at one end of the body, the body is connected with a fixing bar through the universal joint, the fixing bar is connected with a regulating bar through a screw, one end of the regulating bar is connected with a thread bar, a sleeve is arranged on the thread bar, and a grip bar is arranged at one end of the sleeve. The universal prosthetic femoral stem extractor is characterized in that a ratchet wheel is arranged at one end of the fixing bar and the regulating rod is in the shape of a pawl. Due to the special design of the ratchet wheel and the pawl, the extractor can be used for extracting the prosthetic femoral stem directly. The whole operation process cause low suffering to patients and is short in time and accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of orthopedic medical instruments, in particular to a universal femoral stem extractor used for hip joint surgery revision. Background technique [0002] Total hip arthroplasty has been used in the treatment of avascular necrosis of the femoral head in my country for more than 30 years. In recent years, with the slow growth of the national economy, the influx of foreign products, and the vigorous development of my country's people's health care network and medical insurance, artificial total hip replacement has become popular in China. But there can be setbacks and lessons in development, some even heavy. With the continuous practice and in-depth research on artificial hip replacement, the depth and breadth of its understanding is expanding day by day. The curative effect of some diseases and cases has been affirmed, and some differences need to be discussed in depth after time, such as femoral neck fractu...

AI Technical Summary

Problems solved by technology

In addition, the choice of prosthesis, fixation method, painful hip problems after total hip replacement, metal ratio, design and processing technology of domestic prosthesis, timeliness of revision, applicability of revision tools, revision steps, and severe bone resorption Revision and other aspects have not reached a consensus, which affects the healthy development of arthroplasty in my country and makes orthopedic surgeons face the revision of artificial joints, especially artificial hip joints, prematurely and too quickly.

In other words, at a time when basic artificial hip replacements are not generally well understood, the efficacy of widely performed artificial joint replacements poses the challenge of revision and difficult revisions that we have to deal with

[0003] Before and during revision surgery, clinicians urgently need systematic guidance materials that suit national conditions, especially tools for femoral stem removal. Due to various reasons such as early prosthesis design, installation, and factory location, the Many problems occurred during the removal process of the revision. For example, femur fracture occurred during the removal process, which caused secondary injury to the patient. The inability to remove the prosthesis increased the operation time and the chance of infection, and also increased the burden on the patient.

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