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Method for auxiliary evaluation of stress states of knee joints

A force state, knee joint technology, used in medical science, sensors, diagnostic recording/measurement, etc., can solve problems such as difficulty in accurately assessing knee joint rotation, time-consuming, and complicated operations.

Inactive Publication Date: 2011-06-29
PEKING UNIV THIRD HOSPITAL
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Problems solved by technology

[0003] However, the existing kinematic analysis system has the following main problems: 1. The skin surface markers used cannot truly represent the movement of deep bones, and the error between the two can reach 40 mm, especially it is difficult to accurately evaluate the knee joint rotation; 2. .Complicated and time-consuming operation

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  • Method for auxiliary evaluation of stress states of knee joints
  • Method for auxiliary evaluation of stress states of knee joints

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Embodiment Construction

[0018] The following examples facilitate a better understanding of the present invention, but do not limit the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified. The test materials used in the following examples, unless otherwise specified, were purchased from conventional biochemical reagent stores.

[0019] The following steps were used to evaluate the force difference of bilateral knee joints of 12 sports enthusiasts:

[0020] (1) Obtain the size of the subject's foot, the angle of movement of the left and right feet during normal walking, and apply the method provided by N.L.W.Keijsers, etc. (N.L.W.Keijsers, N.M.Stolwijk, B.Nienhuis, et al. A new method to normalize plantar pressure measurements for foot size and foot progression angle. J Biomech, 2009, 42: 87-90.) The above data were standardized. Use a Footscan SCSI 2-meter-long high-frequency flat-panel test system (produced by RSscan Belgium, 2×0...

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Abstract

The invention discloses a method for auxiliary evaluation of stress states of knee joints. The method comprises the following steps: obtaining sizes of feet and foot progression angles of the left and the right feet during normal walking of a testee, carrying out standardization on data, then analyzing sole pressure data of the left and the right feet, and obtaining the average pressure difference aPDA-1 of soles of the two feet during the normal walking; obtaining the sizes of the feet and the foot progression angles of the left and the right feet of the testee during unilateral knee rotation walking, carrying out standardization on the data, then analyzing the sole pressure data of the left and the right feet, and obtaining the average pressure difference aPDA-2 of the soles of the two feet during the unilateral knee rotation walking; wherein, the standardization applies MATLAB R2006a software for carrying out treatment, if P is less than 0.05 during the comparison of aPDA-1 with aPDA-2, the situation prompts that the stresses of the left knee joint and the right knee joint of the testee are inconsistent. The application of the method can rapidly and accurately understand the physiological relationship between the feet and the knees under different actions, thereby guiding various types of training or movement.

Description

technical field [0001] The invention relates to a method for assisting in evaluating the stress state of the knee joint. Background technique [0002] For the observation and comparison of knee joint movement, kinematics analysis is commonly used at present. After positioning the relevant joints and body markers, the infrared camera continuously collects data, and the collection frequency is generally above 60 times / min. Combined with the gait analysis host, the movement track is analyzed and three-dimensionally reconstructed (see figure 1 ) (Butler RJ, Minick KI, Ferber R, et al. Gait mechanics following ACL reconstruction: Implications for the early onset of knee osteoarthritis. British Journal of Sports Medicine, 2009, 43(5): 366-370.). [0003] However, the existing kinematic analysis system has the following main problems: 1. The skin surface markers used cannot truly represent the movement of deep bones, and the error between the two can reach 40 mm, especially it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/103
Inventor 黄红拾周谋望
Owner PEKING UNIV THIRD HOSPITAL
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