Navigation equipment for femoral medullary cavity cutting operation by femoral myelocavity file

Abstract

The invention relates to navigation equipment for a femoral medullary cavity cutting operation by a femoral myelocavity file, comprising an acquisition unit (1), a central control unit (2), a display unit (3), a button keyboard (4), a positioning board (5) and a probe (6), wherein the central control unit (2) is respectively connected with the acquisition unit (3), the display unit (3) and the button keyboard (4); the central control unit (2) controls the acquisition unit (1) to sample point position information and work out a cutting guide passage; three sampling points (501, 502, 503) are arranged on the positioning board (5) and form three vertices of a right triangle; two sampling points (1201, 1202) are arranged on the center line of the back end (12) of the probe (6); and two sampling points (1501, 1502) are arranged on the center line of a guide rod (15) of a driver-extractor of the femoral myelocavity file. The equipment can determine the relative position relation between thecenter line of a femoral medullary cavity and the center line of a femoral myelocavity file cutting guide passage, thereby improving the success rate in implantation of femoral stem prosthesis once.

Description

technical field [0001] The invention relates to a medical navigation device, in particular to a navigation device used for cutting a femoral cavity with a medullary cavity rasp during hip joint replacement surgery. Background technique [0002] During human hip replacement surgery, it is necessary to use a medullary canal rasp to resect part of the cancellous bone at the base of the femoral neck of the proximal femur to facilitate implantation of the hip femoral stem prosthesis. In hip replacement surgery with custom-made femoral stem prosthesis, it is required that the hip femoral stem prosthesis and the patient's femoral cavity fit as close as possible. Therefore, when a custom-made femoral stem prosthesis is processed, it will be A corresponding medullary cavity file was customized to cut the proximal femoral cancellous bone. The matching area of ​​this medullary cavity file was slightly smaller than the corresponding matching area of ​​the femoral stem prosthesis. In thi...

AI Technical Summary

Problems solved by technology

In some hip replacement operations, due to the deviation between the centerline of the medullary cavity file cutting guide and the centerline of the patient's femoral cavity, the femoral stem prosthesis cannot be implanted in place, and even the patient's femur fractures

When the prosthesis cannot be implanted in place, it is usually necessary to take X-rays of the surgical site to determine the stuckness of the femoral stem prosthesis, which not only greatly increases the operation time, but also exposes the patient to the radiation damage of X-rays again

Then take out the stuck femoral stem prosthesis, and then according to the stuck femoral stem prosthesis, file off the cancellous bone of the patient's proximal femur to facilitate the implantation of the femoral stem prosthesis, which will greatly reduce the distance between the proximal femoral medullary cavity and the femoral stem prosthesis. The degree of matching between the femoral stem prosthesis of the hip joint increases the risk of early loosening of the femoral stem prosthesis, which is not conducive to the postoperative rehabilitation of patients

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