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A Journal on Phlebology
Acta Phlebologica 2013 April;14(1):9-13
Compliance: physical and biological features
Centro Diagnostico Aquarius, Naples, Italy
An outline of basic physical laws about compliance is firstly given, through the classical argumentation of Young and Laplace. Then a more rigorous treatment is provided, introducing the terminology and theory actually used in Continuum Mechanics, which uses extensively the stress/strain curve (the material constitutive equation) and the Young tensor. An attempt is made to translate this difficult knowledge into practical information in biological and clinical fields, treating simply the issue of compliance measures in vitro and in vivo and the dynamic changes in venous circulation, when in selected physiopathological conditions compliance is present but doesn’t produce any effect (inactive capacitor).