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Valuation method of load on inner side of knee joint during different walking tasks

A knee joint and task technology, applied in the fields of medical equipment and biomechanical measurement, can solve problems such as time-consuming, large amount of calculation, complex models, etc., and achieve the effects of strong operability, fast and accurate estimation, and simplified determination

Active Publication Date: 2018-02-27
TIANJIN UNIV
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AI Technical Summary

Problems solved by technology

[0003] Although the musculoskeletal model can estimate the knee joint load more accurately, the model is complex, computationally intensive, and time-consuming

Method used

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  • Valuation method of load on inner side of knee joint during different walking tasks
  • Valuation method of load on inner side of knee joint during different walking tasks
  • Valuation method of load on inner side of knee joint during different walking tasks

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Embodiment Construction

[0018] The general technical process of the estimation method of the medial knee joint load under different walking tasks (straight walking, stepping turn, and cross turn) is as follows: figure 1 shown.

[0019] The specific steps are:

[0020] 1) Using the motion capture system and the 3D force plate, collect the kinematic data and ground reaction force GRF of the lower limbs in straight running, stepping and turning tasks, and the ground reaction force GRF. image 3 );

[0021] 2) The stance period of the right leg is taken as the time period for analysis, that is, the time when the right foot is on the force plate, that is, the period when the vertical component of GRF is greater than 1N. The kinematic data and GRF during this period are the raw data to be analyzed.

[0022] 3) The adduction moment, flexion moment and adduction angle of the knee joint during the stance phase of the right leg can be calculated from this data through inverse dynamics;

[0023] 4) Using th...

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Abstract

The invention relates to the fields of medical instruments and biomechanics measurement. In order to determine significant linear relationships among a load on the inner side of a knee joint and a plurality of simple parameters (such as the adduction moment, the bending moment and the adduction angle of the knee joint) during different walking tasks, a valuation method of the load on the inner side of the knee joint during the different walking tasks used for simple valuation of the load on the inner side of the knee joint comprises the following steps that 1, kinematic data of a lower limb and ground reactive force GRF during a direction movement task, a stepping turn task and a cross turn task are collected; 2, a right-leg supporting state is cut out and serves as an analysis period; 3,through the inverse kinematics, the adduction moment, the bending moment and the adduction angle of the knee joint at the right-leg supporting stage can be calculated by means of the data; 4, the loadon the inner side of the knee joint during the period is calculated; 5, the maximum value KAM of the adduction moment of the knee joint and appearing moment t are obtained, and a valuation formula ofthe load on the inner side of the knee joint is determined. The method is mainly applied to biomechanics measurement.

Description

technical field [0001] The invention relates to medical equipment and biomechanics measurement, in particular to a method for estimating the medial load of the knee joint for different walking tasks. Background technique [0002] The medial knee load is an important influencing factor for the occurrence and development of medial knee osteoarthritis. The most accurate method to determine the medial load of the knee joint is to use sensors inside the knee joint to measure directly in vivo, but this method is only applicable to patients undergoing knee joint replacement and is not easy to apply and promote. In order to make up for the shortcomings of the application limitations of in vivo measurement methods, researchers usually use musculoskeletal models to estimate muscle contraction force, and then non-invasively calculate the load inside the knee joint. [0003] Although the musculoskeletal model can estimate the knee joint load more accurately, the model is complex, compu...

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Application Information

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IPC IPC(8): A61B5/11A61B5/22
CPCA61B5/112A61B5/224A61B5/227A61B5/4528A61B5/4585A61B5/72A61B5/7271
Inventor 明东徐瑞何川
Owner TIANJIN UNIV