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  • Walter de Gruyter GmbH  (2)
  • Wolf, Udo  (2)
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  • Walter de Gruyter GmbH  (2)
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  • 1
    In: Current Directions in Biomedical Engineering, Walter de Gruyter GmbH, Vol. 7, No. 2 ( 2021-10-01), p. 795-798
    Abstract: : In patients with arthritic knee joint defects the course of movement, the application of muscle forces and the degree of freedom of the joints of the lower limbs differs significantly from the corresponding data of a healthy proband. The enhanced acoustic-kinetic joint analysis based on AEA, ground force reaction measurements and video enhanced gait analysis permits the correlation of force data, joint angles and acoustic emission significant of defective joint cartilage regions. This diagnostic procedure permits a quantifiable and detailed non invasive diagnosis of lesion patterns in the arthritic knee joint by means of a synchronization algorithm. The AEA shows lesion signals in the first and third knee bend of the patient. The lesion signals are assigned to the joint angles and ground reaction force. Comparing the kinematical data there is a shift between the curves of the hip and the knee angle. Overall the force data represent an imbalance between the left and the right leg during the knee bends. The presentation of the three measurement systems, the method, the synchronization of the data sets and their final assessment as well as the occurring difficulties during a case of a clinical study are discussed. This would be helpful regarding further patients of the clinical study
    Type of Medium: Online Resource
    ISSN: 2364-5504
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2021
    detail.hit.zdb_id: 2835398-5
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  • 2
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2022
    In:  Current Directions in Biomedical Engineering Vol. 8, No. 2 ( 2022-09-02), p. 769-772
    In: Current Directions in Biomedical Engineering, Walter de Gruyter GmbH, Vol. 8, No. 2 ( 2022-09-02), p. 769-772
    Abstract: If the alignment of a leg prosthesis is inadequate there will be the danger of arthritic defects occurring in the preserved knee joint. Acoustic-kinetic joint analysis in orthopaedic technology allows monitoring of the knee joint of an amputee after the alignment of a leg prosthesis and to recognize early joint defects resulting in adaptation of the alignment of the prothesis. A test rig was developed which includes acoustic emission analysis of the knee, video-based gait analysis, ground reaction force measurement and the measurement of the holding forces of the hands. During the examination a subject must do 3 one-legged knee bends during 10 sec with the preserved leg. To support the subject two grab handles were fixed with force sensors to a frame. A series of 6 measurements were recorded with breaks of 2 min. The recorded forces of the leg show a double hump pattern during the knee bend. The rising edge of the flexion phase was not uniform. The forces show no conclusive uniform pattern. The fitness of the probands acts as an indicator for the pattern of the force signals. The signals of the measurements show the necessity of the support for both hands to execute a one-legged knee bend. The understanding of the 3 measured forces is important for the arthritic diagnosis of the knee joint.
    Type of Medium: Online Resource
    ISSN: 2364-5504
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2022
    detail.hit.zdb_id: 2835398-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
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