This assumes that the wall thickness-to-radius ratio or h/r
constant for the branching vessels.
it is clear that alterations in branching vessel lumen radii could exert
effect on wave reflections at vascular
than changes in their respective elastic moduli.
For constant elasticity for all vessels involved at vascular branching,,
i.e. c,/cl=l, the wave reflections due to vascular branching becomes
dependent only on area ratio, i.e.
Minimum Local Reflections at Vascular Branching Junctions
By examination of the characteristic impedances of mother and daughter
vessels, that pulse wave reflection due to vascular branching
(Li, 1984). Since reflection is energetically wasteful, this means little
lost due to pulse transmission through vascular branching
junctions. This has been attributed to close to optimal area ratios and
geometric effect rather than elastic effect
dominants pulse propagation through vascular branching junctions (Li,
Experimental results showed that minimum reflection is obtained when
area ratio equals 1.23 for an equi-bifurcation. This correlates closely to
that given by Womersley's theory (minimum reflection when area ratio
equals 1.26). In small muscular vessels, viscous damping is appreciably
more important than in large vessels.
In these vessels, the point of