abdominal Doppler QUESTIONS AND ANSWERS VERIFIED

If an aneurysm is present: Longitudinal images - Transverse images - CORRECT ANSWERS: Longitudinal images of each iliac vessel should be taken from the bifurcation to the most distal segment. Transverse images of the iliac arteries should be taken below the bifurcation. Doppler is used to: CORRECT ANSWERS: -Ascertain the presence or absence of flow. -Differentiate vessels from nonvascular structures. -Determine the presence and direction of flow. -Evaluate the shape of the waveform. Flow _____ the transducer is positive or above the baseline; flow _____ the transducer is negative or below the baseline. CORRECT ANSWERS: toward away from ____ pulsates with the cardiac cycle and shows its maximal peak during the systolic part of the cycle. CORRECT ANSWERS: Arterial flow ____ shows no pulsatility and has lower flow than arterial structures. A phasic pattern may be seen in the hepatic veins (near the heart) that is associated with an overload of the right ventricle. CORRECT ANSWERS: Venous flow -Flow, often with two distinct patterns, can be seen in the true and false lumen. -The development is a complication of an aortic graft procedure may be difficult to determine if pulsations are present or transmitted through the aortic wall. CORRECT ANSWERS: Aortic dissection and pseudoaneurysms Doppler flow in the ____ aorta demonstrates arterial signals in the patent lumen. If the vessel were occluded, then no arterial signals would be recorded CORRECT ANSWERS: pulsatile Abdominal Doppler: Inferior Vena Cava CORRECT ANSWERS: Velocity is decreased. The Doppler waveform recorded in the inferior vena cava shows a lower flow than is found in arterial structures. The flow is increased in the presence of thrombus formation. Abdominal Doppler: Portal Hypertension Sonographic findings: CORRECT ANSWERS: Sonographic findings -Dilation of the portal, splenic, and mesenteric veins -Reversal of portal venous blood flow -Development of collateral vessels (e.g., patent umbilical vein, gastri