Lower limb equal-length calibrator for total hip replacement

Abstract

According to the technical scheme, the total hip replacement lower limb equal-length calibrator is characterized by comprising a main ruler plate, an auxiliary ruler plate and two positioning rods, the two positioning rods are fixed to the main ruler plate and the auxiliary ruler plate respectively, the auxiliary ruler plate is in sliding connection with the main ruler plate, and the auxiliary ruler plate is in sliding connection with the main ruler plate; scale marks are arranged on the main ruler plate and the auxiliary ruler plate, the arrangement direction of the scale marks is the same as the sliding direction of the auxiliary ruler plate on the main ruler plate, and the scale marks can reflect the total length of the main ruler plate and the auxiliary ruler plate; the aim of improving the consistency of the lengths of the two lower limbs is achieved.

Description

technical field [0001] The present application relates to a medical aid, in particular to a lower extremity isometric calibrator for total hip replacement. Background technique [0002] Hip arthroplasty is one of the effective means to resolve femoral head necrosis, femoral neck fracture, hip osteoarthritis and other diseases. There are many reference indicators for hip arthroplasty, such as the equal length of both lower extremities and the difference in length between the two lower extremities exceeding 5mm. , the patient can feel discomfort; the difference in the length of the lower limbs of more than 10mm will bring obvious discomfort to the patient, and even cause the pelvis to tilt and affect the patient's recovery. [0003] At present, the commonly used method to maintain the balance of the surrounding soft tissue and the equal length of the lower limbs after total hip arthroplasty is to take a standard plain film and measure the preoperative template before surgery. ...

AI Technical Summary

Problems solved by technology

[0002] Hip replacement is one of the effective means to solve diseases such as femoral head necrosis, femoral neck fracture, and hip osteoarthritis. There are many reference indicators for hip replacement, such as equal lengths of both lower limbs and a difference in length of both lower limbs of more than 5mm , the patient can feel discomfort; if the length difference between the lower limbs exceeds 10mm, it will bring obvious discomfort to the patient, and even cause the pelvis to tilt and affect the recovery of the patient.

[0003] At present, the method commonly used to maintain the balance of the surrounding soft tissues and the equal length of both lower limbs after artificial total hip replacement is to take standard plain radiographs and perform preoperative template measurement before operation. The size of the prosthesis, femoral calcar, femoral eccentricity and femoral neck length required, but this method is easily affected by the patient's fat and thin, the magnification rate of X-ray film and some specific conditions in the operation, resulting in double The accuracy of lower extremity length measurement is limited, which will further lead to differences in postoperative lower extremity length

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