11. If the aneurysm stretches too far, it can narrow the opening of the inferior vena cava . 12. Blood from here does not flow through the liver prior to entering the inferior vena cava . 13. Implantation involves anastomoses ( connections ) of the inferior vena cava , portal vein, and hepatic artery. 14. Following birth and separation from the placenta, the oxygen content in the inferior vena cava falls. 15. Blockage of the inferior vena cava is rare, and is treated urgently as a life-threatening condition. 16. On the right, the gonadal veins and suprarenal veins drain into the inferior vena cava directly. 17. Inferior vena cava filters should be removed as soon as it becomes safe to start using anticoagulation.18. By contrast, all the lumbar veins and hepatic veins usually drain directly into the inferior vena cava . 19. The right ovary drains from the plexus to the ovarian vein and then to the inferior vena cava . 20. "' Inferior vena cava syndrome "'( IVCS ) is a result of obstruction of the inferior vena cava.
