In differentiating between an occluded artery and occluded vein, a distinguishing sign (present in venous but not arterial occlusion) is:
a. color change.
b. edema.
c. pain with walking.
d. pain with palpation.
B
Deep vein thrombosis is suspected if swelling, pain, and tenderness occur over a vein. An oc-cluded artery does not cause any swelling (edema). A positive Homan sign indicates venous thrombosis.
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