Histology - Fscaresystems Viridex Rf Bedienungsanleitung

MANUEL
RF
alongside the muscles of the anterior section of the leg. At the upper edge of the interossal
ligament they join the venous tibial-peroneal trunk
The posterior tibial veins: they start at the confluence of the plantar veins, rise in the posterior
section of the leg and in the upper 1/3 of the leg, they form the tibial-peroneal trunk with the
peroneal veins.
The peroneal veins start out narrow and progressively increase in calibre from the influx of
veins from the solear muscle. They run across the posterior face of the leg muscle and help to
form the tibial-peroneal trunk.
At the knee, all of the leg veins join (near the ring of solear muscle or above the articular
interline), giving rise to the popliteal vein.
It may be double (1/3) or even triple. It receives many tributaries: the medial and external
gemellary veins - the articular veins - the external saphenous vein - the popliteal fossa vein.
At the thigh: the superficial femoral vein follows on from the popliteal vein at the level of the
origin is outside of the superficial femoral artery, at the rear in mid-thigh and within the crural
ring. It receives the deep femoral vein, with the same name as the artery, 6 cm from the arch.
Above the crural arch, the external iliac vein follows on from the common femoral vein before
joining the internal iliac vein to form the common iliac vein. Where these two common (or
primitive) iliac veins meet is the origin of the inferior vena cava.
3.3.

Histology

The venous system begins at the level of micro-circulation. The arteries are extended by
arterioles and finally by meta-arterioles. From these run the capillaries that branch into
microvenules and in parallel the artero-venous anastomoses.
The post-capillary microvenules have a diameter of 10 to 30 µm. Their walls are comprised of
endothelial cells lying on a basal membrane encased in a layer composed of pericytic cells
and fibroblasts. This layer increases as it moves away from the capillaries. The post-capillary
microvenules converge into collector venules with a diameter of 30 to 50 µm. Their walls are
made up of smooth muscle cells. The collector venules join up with the veins.
The capillary flow is regulated by a dual system: the pre-capillary sphincters and Masson's
neurovascular glomus (which forms part of the neuro-vegetative system).
Varicosities occur in the superficial dermis. There are no vessels in the epidermis. The
saphenous veins and the largest varicose veins are located in the deep dermis, especially the
hypodermis, in contact with the adipous lobules.
Date 27/03/2014
THERMOCOAGULATION – Viridex
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