The Vein Walls; The Valves - Fscaresystems Viridex Rf Bedienungsanleitung

MANUEL
RF

3.3.1. The Vein Walls

They are composed of three tunics:

The Intima or internal tunic: Composed of a vascular endothelium - a sub-endothelial
layer of mucoglycoproteins of conjunctive tissue and cells, this is the seat of the
endothelial cell. The latter is in constant communication with the elements of the blood
and its response to hypoxia is the prime mover in the biochemical cascade that leads
to venous incompetence.

The Media or middle tunic composed of smooth muscle fibres and an elastic
conjunctive structure.

The Adventitia or external tunic; the vasa vasorum, vessels that nourish the vein walls,
are located in this conjunctive tissue. They are accompanied by lymphatic vessels and
sympathetic nerve endings. These vasa vasorum carry oxygen and nutrients to the vein
wall and a lack of perfusion can give rise to hypoxia of the median layer leading to a
structural alteration of the vein wall.

3.3.2. The Valves

Date 27/03/2014
THERMOCOAGULATION – Viridex
A semilunar flap of endothelial tissue, the main
function of which is to segment the blood
vessels and above all to prevent blood reflux.
This flap thins the vein wall near the valve
thereby making it more fragile.
The valves have passive mobility in the lumen
of the vein. They are more numerous in the deep
veins.
If they function correctly, they close totally when
the venous pressure downstream is greater
than upstream.
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