Venous System Flashcards
3 types of lower extremity veins
Superficial
Deep
Perferators
Definition of Superficial veins
Remain in fascia separating the subcutaneous tissue and the muscle.
Lay closer to the surface of the skin
Definition of deep veins
Usually they run alongside a corresponding artery.
Deep veins are usually responsible for a clot directly to the lungs
Definition of Perforator veins
Small venous channels that run between the superficial and deep systems.
“Connectors”
Move blood from the superficial to deep systems
Reasoning for valves in veins
All veins have strong BICUSPID valves that open and close with respiration.
Prevents reflux of blood.
Valves increase as you go more distal.
Amount of valves increase from _____ to _____
There are more valves the more distal you go in the extremities
Superficial Venous System- veins
Greater Saphenous and Lesser Saphenous
Definition of Greater Saphenous Vein
Drains blood from subcutaneous fat and skin of the calf and thigh.
Starts distal/medial foot and travels to medial thigh.
Penetrates deep fascia, dumps into CFV
Definition of Lesser Saphenous
Starts lateral foot and travels up the back of the calf.
Terminates and empties in popliteal fossa/ popliteal vein.
Definition of Perforating Veins
Course between superficial and deep system through the muscle fascia.
Flows superficial to deep.
Found in medial calf (cockett’s)
Found in medial thigh (Dodd’s and Hunterian)
They can also exist between the gastric and soleal veins
2 other locations for perforating veins
Cockett’s : medial and/or lateral calf
Dodd’s and Hunterian: medial thigh
Deep Venous System veins
External Iliac Internal Iliac Common Iliac Popliteal Femoral Common Femoral Anterior Tibial Posterior Tibial Peroneal
Definition of the external, internal and common iliac
External: continuation of the common femoral through the pelvis
Internal: unites with external to form common iliac
Common: formed by the internal and external.
-rt and lt common iliac join to create the IVC
Definition of Popliteal, Femoral and Common
Popliteal: located behind the knee where small saphenous ends
Femoral: travels up medial thigh to groin, dumps into common
Common Femoral: continuation of femoral and profunda.
-turns into the external iliac
Femoral Vein aka:
Superficial femoral
