IVC Flashcards
What is the function of the IVC
Returns deoxygenated blood to the heart from lower body
IVC is located..
- Retroperitoneal
- Superiorly and posteriorly toward the heart right of midline
IVC is formed at..
area of the umbilicus by the junction of RT and LT common iliac veins
Normal size of the IVC
Varies with respiration
Decreases when exhaling
Increases when inhaling
Anatomy of the IVC
Thinner walls than in arteries
(Tunica Media differs between vessels)
Tributaries of the IVC
- Lumbar Veins
- RT gonadal vein
- LF gonadal vein
- Renal veins
- Hepatic veins
Right hepatic vein function
Empties RT lobe of liver
Mid hepatic vein function
drains caudate lobe
Left hepatic vein function
Drains LT lobe of liver
Hepatic Veins _____ in diameter as they drain toward IVC
Increase
RHV help divide the ____ into _____ and _____
Right lobe liver into
Anterior and posterior
LHV help divide the _____ into ______ and ____
Left lobe liver into
Medial and lateral
MHV separates the _____ and ______
Anterior RLL from the Med LLL
Difference between hepatic veins and portal veins
Hepatic veins drain toward IVC
Increase in diameter as they drain
Walls are less echogenic
Normal variants of IVC
- Double IVC
- IVC may be on the left side of the patient
- A portion of IVC may be absent
Hemodynamic pattern for distal IVC
Complex “pulsatile” flow
Hemodynamic pattern for proximal IVC
Phasic flow
Hemodynamic pattern for hepatic veins
Pulsatile
Three phases
- Two toward the heart
- one away from the heart
Hepatfugal flow
Hemodynamic pattern for portal veins
- Minimally phasic
- Low peak and mean velocities
- Hepatopetal flow
Hemodynamic pattern for renal flow
Phasic flow
