Positioning measuring device used for hip replacement surgery and measuring method

Abstract

The invention provides a positioning measuring device used for hip replacement surgery and a measuring method. Through the using of a high-precision sensor and a high-performance microprocessor to measure, the problems of manual error and body position error of rulers can be solved; and the measuring device can be installed and fixed on the anterior superior iliac spines of the hip pelvis of a patient with corresponding supporting tools to carry out measuring with the moving of the pelvis, and the patient is the measured target, so that the influences of patient standing positions on data canbe reduced. Through the measuring device and measuring method, surgery can be high in flexibility, for the specific conditions of the patient, surgical programs can be planned in advanced, so that suitable supine and lateral positions can be selected; and the data can be measured in real time during operation, through two-way data comparison and verification, better clinical curative effects can be achieved, and the probability of reoperation can be reduced. Based on a three-dimensional motion data model, the position plane of a human coronal plane can be accurately obtained according to three-dimensional motion data, so that the processing of angles can be more accurate.

Description

technical field [0001] The invention belongs to the field of medical instruments, in particular to a positioning measuring device and a measuring method for hip joint replacement surgery. Background technique [0002] Total hip arthroplasty is a new type of surgery that has emerged in recent years. Based on the traditional total hip arthroplasty, it improves the surgical approach, operation method and operating tools in a relatively small incision. (5 ~ 10cm) to complete the installation and replacement of hip prosthesis. The goal of total hip arthroplasty is to restore a stable, weight-bearing, and functional long-term hip. With the improvement of joint prosthesis and the advancement of surgical technology, it is no longer a problem for the prosthesis to survive in the body for 10-20 years. However, the current joint replacement patients are showing a younger trend, which puts forward higher requirements for the service life of the joints. For the same joint prosthesis, ...

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Problems solved by technology

On the other hand, the installation angle and position of the hip prosthesis also have a crucial impact on the prosthesis life and clinical function. Improper installation of the acetabular prosthesis can lead to prosthesis dislocation, impingement edge, increased wear and joint range of motion Variety

[0004] At present, most hip replacements have the following problems: 1. The initial stability of the acetabular prosthesis is not achieved after implantation, resulting in loosening of the acetabulum; 2. Too much anteversion or abduction angle of the acetabular cup leads to wear; 3. Acetabular cup fit too deep or too shallow resulting in unstable fit

[0006] However, the above-mentioned positioning measurement scheme of the prior art has the following disadvantages: 1. The measurement data is measured by a ruler, and there will inevitably be manual errors and body position errors; 2. The target of measurement is the patient's CT light sheet, the patient's standing posture The impact on the data is very large; 3. The establishment of the plan is established on the basis of a two-dimensional plane, and there are errors in the establishment of the patient's three-dimensional data; 4. There will also be errors in the planning before the operation and the actual operation during the operation. There is no actual measurement reference object, but to directly observe the swing angle of the tool with the tool. If there is a large error, a second operation may be required; 5. There is no dynamic 3D data for program verification, and the patient’s acetabular movement has a negative impact on the knee joint. It is very important to establish the deformity

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