Superficial and deep venous drainage Flashcards
What serves as the boundary between superficial and deep veins
the deep fascia. Superficial veins are in the superficial fascia and follow cutaneous nerve branches. Deep veins cannot be palpated and follow arteries.
Do superficial and deep veins have valves?
Yes, and deep veins tend to have more. Valves prevent flow in reverse direction.
What type of veins link the superficial and deep venous system
communicating or perforating veins
Where is most blood carried
in the deep system
Two or more veins that accompany an artery are called.
venae comitantes
what are the benefits of venae comitantes
counter current heat exchange and arteriovenous pump
what major arteries do NOT have venae comitantes
femoral , deep femoral, popliteal
What functions together to convey blood to the heart
venous valves and muscular contractions
At rest, valves are _______
closed
When a muscle contracts, superior valve is ____ and inferior valve is ______
opened, closed
What is the dorsal venous system
superficial system, starts with (proper)dorsal digital veins and ends with great and small saphenous veins
The deep venous system
veins that accompany dorsalis pedis and its branches
Plantar venous system: superficial
extremely superficial, subdermal mesh, intradermal. Joins the dorsal system on the medial and lateral borders of the foot.
Plantar venous system- deep system-
veins accompany the medial and lateral plantar arteries and branches.
How is blood directed in the leg
from superficial to deep veins. Perforating veins have valves.
On the way from the leg towards the heart, what can occur
due to the absence of valves in perforating pedal veins, blood can be bi-directional on its way up the leg towards the heart
When valves are present in perforating pedal veins, how does blood travel
from deep to superficial on its way up the leg towards the heart
when valves are incompetent and blood in deep system flows back into the superficial system. This causes superficial veins to become distended and tortuous.
varicose veins
Thrombosis
formation of a blood clot within a vessel
Deep vein thrombosis
originate in lower limb, causes: venous stagnation, venous injury, tendency towards blood clot formation.
complication: if thrombosus breaks away and travels, can reach pulmonary trunk
what is the route of thromboembolism that originated in the popliteal vein to the pulm trunk
popliteal vein, femoral vein, external illiac, common illac, IVC, right atrium, right ventricle, pulmonary trunk
small saphenous dumps blood into
popliteal vein
great saphenous dumps into
saphenous opens and joins femoral vein
pathway of veins
dorsal digits, dorsal metatarsal, venous arch, medial marginal vein, great saphenous vein, femoral vein
