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Venous Doppler
Remains primary modality for assessing deep venous thrombosis of upper & lower extremities
Diagnostic Criteria for DVT: Most reliable is loss of normal vein
compressibility Duplex or color Doppler used to document flow Echogenic material in venous lumen is most
specific sign of DVT but is only 50% sensitive
Acute Appendicitis
Look for blind ending noncompressible tubular structure arising from cecum
Diameter > 6mm in adult suspicious
Appendicolith in appropriate clinical setting is suspicious
Arterial Doppler
Evaluate Carotid disease Screen for or monitor AAA Evaluate peripheral vascular disease Intracranial doppler in Sickle Cell Dz
and subarachnoid hemorrhage
Carotid StenosisS&W Lab Criteria
% STENOSIS
VELOCITY(METERS/SEC)
IC/CC PEAKSYSTOLIC RATIO
0-49 <1.3 <1.8
50-69 1.3-<2.1 1.8-<3.1
70-99 >2.1 >3.1
Occluded No flow
Carotid Arterial Evaluation
Finding - High Grade Stenosis – Proximal ICA with elevated peak systolic velocity