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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 25 (1987), S. 631-637 
    ISSN: 1741-0444
    Keywords: Biomechanical impedance ; Biomechanical properties ; Impedance ; Living body structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A physical model for biomechanical impedance has already been proposed. This model is characterised by three impedance spectra: soft, intermediate and hard pattern. An impedance spectrum of the body surface represents mostly the soft pattern, The formative mechanisms of all three patterns have been unsolved until now. Because the physical model is expressed by experimental equations, its theoretical background is not apparent. In the paper a simulating material (simulator) is used, whose tactility is not unlike human skin, and the formative mechanism of biomechanical impedance is revealed through experiments on the simulator under various measuring conditions. The influences of the measuring circumstances, living body structure and physical constants of the body tissues on the experimental equations of the physical model are fully discussed. The formative mechanism of biomechanical impedance which represents the physical model is explained in terms of an equivalent mass, a dynamic equivalent stiffness, a dynamic viscosity and a composite characteristic. The dependence between body parts from which the measurements are taken and soft, intermediate and hard patterns are demonstrated.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 24 (1986), S. 493-498 
    ISSN: 1741-0444
    Keywords: Biomechanical impedance ; Biomechanical properties ; Impedance ; Modelling of human body
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract New experimental modelling of biomechanical impedance is proposed. The parameters which express the impedance characteristics are simply determined by impedance measurement. Audiofrequencies below about 1000 Hz and comparatively lower preloads (below about 6370 kg m−2) are chosen as the research domain. This model, however, can express wide range of body surface impedance not only in soft but also in stiff and intermediate tissues. It will never introduce the impracticably ideal conditions found in the mathematcial models proposed to date. Furthermore the parameters which express the model cannot be determined by impedance measurement alone. The impedance Z(jw) is expressed in two parts: the impedance Z1 (jw) at a higher frequency including a complex mass and the impedance Z2(jw) at a lower frequency including a complex compliance of Cole-Cole’s type. Z1(jw) is the property of body fluid and Z2(jw) is that of a viscoelastic body.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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