Week 1 - Abd Vasc Flashcards
What sort of flow does the abdominal aorta demonstrate suprarenally?
Forward flow during diastole
Low resistance
What sort of flow does the abdominal aorta demonstrate infrarenally?
Triphasic waveform
What flow does the celiac axis demonstrate?
Low resistance
What are the branches of the celiac axis?
Left gastric artery
Splenic artery
Common hepatic artery
What waveform does the SMA demonstrate? (fasting & post prandial)
Fasting state- high resistance w/ low diastolic flow
Post prandial- lower resistance w/ forward flow
What waveform does the renal arteries demonstate?
Low resistance
Constant forward flow during cardiac cycle
What’s the diameter of the aorta?
2.0-2.5 cm
What’s the diameter of the celiac artery?
0.7 cm
What’s the diameter of the SMA?
0.6 cm
What’s the diameter of the IMA?
0.3 cm
What’s the diameter of the renal arteries?
0.4-0.5 cm
What waveform does the proximal IVC demonstrate?
W flow
Pulsatile flow
Results from intraabdominal pressure associated w/ respiration & regurgitation of blood from rt. atrium
What waveform does the distal IVC demonstrate?
Phasic flow
Less affected by the heart
What waveform does the hepatic veins demonstrate?
W flow
Pulsatile
Three phases– 2 towards heart, 1 away
Hepatofugal flow
The hepatic flow pattern is similar to what vessel?
IVC
What creates the W shape waveform in the hepatic veins?
Changes in the central venous pressure, respiration and compliance of liver parenchyma
What is the waveform of the portal veins?
Minimally phasic
Low peak & mean velocities
Hepatopetal flow
How much of the blood to the liver is supplied by the PV?
70%
What is the typical velocity of the PV?
20-30cm/s
What is the waveform of the renal veins?
Phasic flow
What is the size of the IVC?
2.5-3.0 cm
What is the size of the hepatic veins?
4.0-6.0 mm
What is the size of the portal veins?
13 mm
What is the size of the splenic vein?
4.0-6.0 mm
What is the size of the SMV?
6.0-7.0 mm
What is the size of the renal veins?
4.0-6.0 mm