Axial displacement measuring equipment for knee joint cruciate ligament injury

A cruciate ligament, measuring equipment technology, applied in the directions of diagnostic recording/measurement, medical science, sensors, etc., can solve the problems of experience and force, lack of ligament stability, no unified standard, etc.

Pending Publication Date: 2021-05-25
SHANGHAI INNOMOTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Knee cruciate ligament injury is a relatively common sports injury in clinical practice, and its diagnosis in outpatient clinics is mainly through manual examination (such as figure 1 ), but these methods lack quantitative indicators that can be compared and counted, and the inspection results are greatly affected by the experience and force of the inspector, and there is no uniform standard
In addition, cruciate ligament reconstruction, which is now becoming more mature, still lacks an effective and quantitative method for evaluating ligament stability after surgery

Method used

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  • Axial displacement measuring equipment for knee joint cruciate ligament injury
  • Axial displacement measuring equipment for knee joint cruciate ligament injury
  • Axial displacement measuring equipment for knee joint cruciate ligament injury

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 2 As shown, this embodiment provides a kind of axis displacement measurement device for knee cruciate ligament injury, including: guide plate 1, displacement sensor 2;

[0045] The lower end of the guide plate 1 is fixed on the calf and fits closely with the calf; the upper end of the guide plate 1 is fixed on the femoral condyle, and the support device arranged on the upper end of the guide plate 1 makes the The upper end of the guide plate 1 deviates from the patella and the tibia by a certain distance, so as to reserve a movable space for the tibia when measuring the axis displacement; the displacement sensor 2 is vertically arranged on the guide plate 1, and the The front end of the displacement sensor 2 abuts on the tibial tuberosity.

[0046] Specifically, in this embodiment, before measuring the cruciate ligament injury of the knee joint, it is first necessary to fix the axis displacement measurement device so that the axis displacement measureme...

Embodiment 2

[0059] Such as image 3 As shown, the structure of this embodiment is basically the same as that of Embodiment 1, the difference is that, on the basis of Embodiment 1, this embodiment also adds a position tracker 3;

[0060] The position tracker 3 further includes: a first position tracker 31 and a second position tracker 32; the first position tracker 31 is fixed on the front end of the displacement sensor 2, and the second position tracker 32 It is fixed on the femur; the first position tracker 31 cooperates with the second position tracker 32 to obtain the bending angle of the tibia, and the acceleration of the tibial movement through the first position tracker 31 .

[0061] Specifically, in order to make the measurement of the degree of cruciate ligament injury more accurate, the present invention also adds a position tracker 3 on the basis of the displacement sensor 2 .

[0062] By cooperating with the two position trackers 3 respectively arranged at the front end of the...

Embodiment 3

[0068] The present embodiment provides 3 kinds of specific operation modes of the present invention, specifically as follows:

[0069] (1) Adjust the patient to the supine position, the examiner stands on the outside of the examined limb, passively straightens the knee joint, clicks the circular button on the instrument panel, and resets the display of the displacement sensor. Grip the heel with one hand to internally rotate the calf, and apply valgus stress to the proximal tibia with the other hand. The knee begins to bend gradually from 0 degrees of extension, and when the affected knee is out of the locked position, the lateral tibial condyle begins to gradually subluxate forward. When the knee is slowly bent for 30°-40° (the angle calculated by the position tracker), the tibia suddenly resets backward, check the displayed value and record the sudden change value (displacement and acceleration) to measure the degree of ligament damage.

[0070] (2) The patient lies on his ...

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Abstract

The invention relates to the technical field of axial displacement measurement, and discloses an axial displacement measurement device for knee joint cruciate ligament injury, which comprises a guide plate and a displacement sensor, the lower end of the guide plate is fixed to the shank and tightly attached to the shank. The upper end of the guide plate is fixed on a femoral condyle, and the upper end of the guide plate deviates from a patella and a tibia by a certain distance through a supporting device arranged at the upper end of the guide plate, so that a movable space is reserved for the tibia during axial displacement measurement; the displacement sensor is arranged on the guide plate, and the front end of the displacement sensor abuts against the tibial tuberosity during measurement. The anterior and dislocation reduction speed and amplitude data of the tibia under different flexion and extension and inward and outward turning conditions can be measured, quantitative measurement is carried out on cruciate ligament injuries, and doctors are assisted in diagnosing patients.

Description

technical field [0001] The invention relates to the technical field of shaft displacement measurement, in particular to a shaft displacement measurement device for knee cruciate ligament injury. Background technique [0002] The cruciate ligament of the knee is a ligament that is located inside the knee joint and forms a cross, so it is also called the cruciate ligament. It is located behind the center of the knee joint. In daily life, it is easy to cause damage to the cruciate ligament of the knee joint after the front and rear external force damages the knee joint, which will cause obvious swelling and pain in the knee joint and affect the stability of the knee joint. Therefore, after the cruciate ligament injury of the knee joint occurs in the patient, timely treatment is necessary to restore the stability of the knee joint and avoid knee joint instability in the later stage, which affects the function of the knee joint. [0003] Knee cruciate ligament injury is a relati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/11
CPCA61B5/11A61B5/1122A61B5/4533
Inventor 王少白皇甫良张辉
Owner SHANGHAI INNOMOTION
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