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

Venous Doppler

Finding - Acute occlusive DVT of popliteal vein into trifurcation

Venous Doppler

Finding - echogenic non occlusive chord consistent with chronic DVT.

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

Carotid Arterial Evaluation

Finding – absence of flow consistent with occluded CCA

Screening for AAA

Sonography can define aortic size, determine the extent of atherosclerosis, and detect aorta dissection