A Detailed Digital Model of the Human Arterial System
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Дата
2005
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Анотація
A detailed model of the human circulation is
developed. The large systemic arteries are presented by the
branching system of straight viscoelastic tubes which
corresponds topology of the human circulation. Terminal
elements at the outlets of the system are presented by tree-like
systems with a given topology (with/without anastomoses) and
certain geometrical relations between the lengths and
diameters of the vessels of different branching orders and the
relation between the maximal total length of the vasculature
and diameter of the feeding artery. The relations have been
obtained by analysis of the morphometric data. They allow
correct calculations of the hydraulic resistance and wave
impedance of the arterial beds of different organs. The
proposed outflow boundary conditions are more preferable
then the Windkessels and the regular tree-like systems because
they describe both resonant properties of the intraorgan
vasculatures and the distributed sources of the reflected
waves. The model describes realistic pressure and flow waves
and pressure-flow dependences either in the aorta or in the
feeding arteries of the inner organs. The latter underlies
possibility of the novel noninvasive diagnostics of the state
(normal or pathological) of the intraorgan circulation by noninvasive
measuring the wall oscillations and blood flow velocity
in any cross-section of the feeding artery of the organ.
Опис
Ключові слова
circulatory system, input admittance, hydraulic, arterial networks, wave propagation
Бібліографічний опис
Proc. of the 1-st Intern. Conf. on Complex Medical Engineering. Japan.