Venous drainage

Mechanism of venous drainage
Varicose veins
Deep vein thrombosis

1. Venous drainage Dr Rajiv Ranjan RIMS, Ranchi

2. Initiation

3. 2 integrated & coexisting Venous systems superficial venous system : primary, suprafascial,more distensible & lies in loose connective tissue Deep venous system : secondary(conduit), subfascial , thicker walled & surrounded by dense connective tissue Account for 80-90% of venous return

4. Venous return mechanism Deep fascia

5. Venous return mechanism Intramuscular pump Soleal pump Sole pump Pterygoid plexus

6. Venous return mechanism venae comitantes

7. Venous return mechanism Respiratory pump

8. Venous return mechanism SNS

9. Venous return mechanism Valves

10. Venous return mechanism

11. Varicose vein Valves prevent downward & outward flow

12. Trendelenburg Test Test devised to show competency of the valves in the superficial and deep veins in patients with varicose veins Torniquet placed at Upper thigh Above knee Below knee Checks valvular incompetence of perforator as well as superficial veins

13. Trendelenburg Test

14. Cause : injury, surgery , certain medications and limited movement