Ultrasound Registry review rvt QUESTIONS WITH COMPLETE SOLUTIONS

Hemodynamically significant stenosis of the celiac axis is diagnosed with the PSV greater than CORRECT ANSWERS: 2.0 m/s. A renal transplant RI should not exceed CORRECT ANSWERS: 0.80 Hemodynamically significant stenosis of the SMA is diagnosed when the peak systolic velocity is greater than? CORRECT ANSWERS: 2.75 m/s Venous flow in the IVC, hepatic and renal veins normally demonstrate CORRECT ANSWERS: respiratory phasicity and mild cardiac pulsatility. Parenchymal Resistance Ratio or End Diastolic Ratio is used to assess parenchymal resistance in renal transplant cases. CORRECT ANSWERS: PRR <0.2 indicates increased resistance and possible rejection. PRR = EDV / PSV = 6 / 36 = 0.17 refers to extensive diffuse atherosclerotic disease causing obstruction of the distal aorta and bilateral lower CORRECT ANSWERS: Leriche syndrome Doppler waveforms from arteries in a rejected allograft will demonstrate CORRECT ANSWERS: High resistance Renal artery stenosis is considered hemodynamically significant when it is greater than CORRECT ANSWERS: 60% What is the first branch of the ascending aorta? CORRECT ANSWERS: Coronary arterie The arc of Riolan and the marginal artery of Drummond connect the CORRECT ANSWERS: SMA and IMA through the mesentery. They offer potential for collateral flow if a mesenteric obstruction occurs. The renal allograft artery is commonly attached to the CORRECT ANSWERS: native internal or external iliac artery. Mesenteric ischemia requires stenosis or occlusion of CORRECT ANSWERS: at least two of the mesenteric arteries. (Celiac, SMA, or IMA) Only SMA stenosis is present. The other velocities are normal for the IMA and celiac. Sight for liver transplant stenosis CORRECT ANSWERS: The donor hepatic artery is connected to the native hepatic artery just outside the hilum of the donor liver. The most common site for arterial stenosis is at the anastomosis site. Myointimal hyperplasia can lead to stenosis at the anastomosis