| The vascular return
relies on 2 systemic systems, the venous system and the lymphatic system.
The 2 systems are both divided in 2 sub-systems, the superficial one and
the deep one.
Contrary to the venous
system where the deep one is the preponderant sub-system (over 85% of the
lower extremity venous return flows through the deep veins), the lymphatic
circulation relies mostly on the superficial sub-system.
The muscular contraction
is a commonly accepted benefit to the deep venous return. However, the
muscular contraction is almost inefficient on the lymphatic circulation.
Indeed, the main lymphatic flow, superficial or extra-fascicular, is unaffected
by the muscular contraction pulses.
The superficial venous
drainage of the lower extremities communicates with the deep veins through
multiple perforating branches. Therefore, deep venous insufficiencies have
a considerable effect on the superficial venous sub-system. Once more the
lymphatic system differs here from the venous system in the poverty of
channels between the superficial and the deep sub-systems.
Trophic changes linked
to vascular return deficiency, be it venous or lymphatic, are largely dependent
on lymphatic control. This fact explains the good clinical outcomes identified
when the treatment approach addresses the efficiency of the superficial
circulation. |