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DVT423- TR3
USIDMS Mesenteric Doppler
| Question | Answer |
|---|---|
| What type of waveform is seen in the aorta above the renal arteries? Why? | Low resistance, because the organs need constant flow |
| What type of waveform is seen in the aorta below the renal arteries? Why? | High resistance, because the legs do not need constant flow |
| Why is true mesenteric ischemia rare? | Multiple collateral routes; the celiac, SMA, and IMA must all be occluded |
| How does the SMA waveform look preprandial? | High resistance |
| How does the SMA waveform look postprandial? | Low resistance |
| What PSV is characteristic of a 70% stenosis of the celiac artery? | Greater than 200 cm/s and post stenotic turbulence |
| What PSV is characteristic of a 70% stenosis of the SMA? | Greater than 275 cm/s and post stenotic turbulence |
| Which patient population is the highest risk group for AAA complications? | Males over 60 years of age |
| What are the branches of the celiac axis? | Left gastric artery, splenic artery, and common hepatic artery |
| Which artery allows communication between the celiac artery and SMA, providing collateral flow ? | Pancreaticoduodenal artery |