ISSN:
1741-0444
Schlagwort(e):
Admittance plethysmography
;
Arterial compliance
;
Human limb
;
Noninvasive measurement
;
Volume elastic modulus
;
Volume oscillometric method
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
,
Chemie und Pharmazie
,
Medizin
Notizen:
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.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF02447504
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