Abstract
Arterial elasticity expressed by such indices as volume elastic modulus Ev and compliance Ca were noninvasively measured in various human limb segments; the upper arms, forearms, fingers, thighs, calves and toes. These indices are defined, respectively, as\(E_v = \Delta P/(\Delta V/\bar V_a )\) and Ca=ΔV/ΔP, where ΔP is pulse pressure,\(\bar V_a \) mean arterial volume and ΔV its pulsatile variation. ΔP was calculated from systolic Pas and mean Pam arterial pressures determined by volume oscillometric sphygmomanometry using the following equation:\(\Delta P = 3(P_{as} - P_{am} )/2\bar V_a \) and the ΔV were detected by electrical admittance plethysmography at various transmural pressure Pt levels controlled by a compression cuff. The values obtained in these limb segments were compared with each other at Pt levels 0,30 and 60 mm Hg and the differences between them were discussed.
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