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Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye Anatomy  and  Pathophysiology
Anatomy and physiology of the venous system  in the lower extremity <ul><li>Deep venous system:  the channel through which...
Superficial venous system  <ul><li>Great saphenous vein </li></ul><ul><li>-runs from dorsum of foot medially up leg </li><...
Superficial venous system <ul><li>Small saphenous vein </li></ul><ul><li>- runs from lateral foot up posterior calf </li><...
Perforating veins <ul><li>Mid-thigh Perforating Vein </li></ul><ul><li>Dodd </li></ul><ul><li>Proximal Calf Perforator </l...
Musculovenous pump <ul><li>Foot and calf muscles act to squeeze the blood out of the deep veins </li></ul><ul><li>One way ...
Venous Valvular Function <ul><li>Valve leaflets allow unidirectional flow, upward or inward </li></ul><ul><li>Dilation of ...
Doppler exam: Normal flow Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye
Doppler: Reflux Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye
REFLUX : its contribution to varicose veins Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye
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Jr veins anatomy and physiology

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Jr veins anatomy and physiology

  1. 1. Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye Anatomy and Pathophysiology
  2. 2. Anatomy and physiology of the venous system in the lower extremity <ul><li>Deep venous system: the channel through which 90% of venous blood is pumped out of the legs </li></ul><ul><li>Superficial venous system: the collecting system of veins </li></ul><ul><li>Perforating veins: the conduits for blood to travel from the superficial to the deep veins </li></ul><ul><li>Musculovenous pump: Contraction of foot and leg muscles pumps the blood through one-way valves up and out of the legs </li></ul>Copyright © 2009 by American College of Phlebology
  3. 3. Superficial venous system <ul><li>Great saphenous vein </li></ul><ul><li>-runs from dorsum of foot medially up leg </li></ul><ul><li>-site of highest pressure usually the saphenofemoral junction, but may begin with perforating or pelvic vein </li></ul>Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye
  4. 4. Superficial venous system <ul><li>Small saphenous vein </li></ul><ul><li>- runs from lateral foot up posterior calf </li></ul><ul><li>-variations in termination </li></ul><ul><li>-segmental abnormalities </li></ul><ul><li>-site of highest pressure frequently the saphenopopliteal junction, but may begin with an inter-saphenous connection or perforating vein </li></ul>Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye
  5. 5. Perforating veins <ul><li>Mid-thigh Perforating Vein </li></ul><ul><li>Dodd </li></ul><ul><li>Proximal Calf Perforator </li></ul><ul><li>Cockett </li></ul><ul><li>Gastrocnemius </li></ul><ul><li>Lateral thigh (lateral subdermic plexus) </li></ul>Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye
  6. 6. Musculovenous pump <ul><li>Foot and calf muscles act to squeeze the blood out of the deep veins </li></ul><ul><li>One way valves allow only upward and inward flow </li></ul><ul><li>During muscle relaxation, blood is drawn inward through perforating veins </li></ul><ul><li>Superficial veins act as collecting chamber </li></ul>Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye
  7. 7. Venous Valvular Function <ul><li>Valve leaflets allow unidirectional flow, upward or inward </li></ul><ul><li>Dilation of vein wall prevents opposition of valve leaflets, resulting in reflux </li></ul><ul><li>Valvular fibrosis, destruction, or agenesis results in reflux </li></ul>Copyright © 2009 by American College of Phlebology
  8. 8. Doppler exam: Normal flow Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye
  9. 9. Doppler: Reflux Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye
  10. 10. REFLUX : its contribution to varicose veins Copyright © 2009 by American College of Phlebology Illustration by Linda S. Nye

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