Absent R radial pulse
James H. Cowan III, M.D.
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This 17 y.o. patient drove his car into an embankment. He had no loss of conciousness. The right radial pulse was noted to be absent, though no sensory or motor symptoms were present. The patient did have evidence of a seatbelt injury.
Q. Which of the following are arterial collateral circulation pathways for an occluded innominate artery:
A. L ext. carotid a. via L to R superior thyroidal aa. to R ext. carotid artery
B. L subclavian a.to L thyrocervical a. via L to R inf. thyroidal aa. to R thyrocervical a. to R sub
C. L vertebral a. to basilar a. to R vertebral a. to R subclavian a.
D. R ext. Iliac a. to R inf. epigastric a. to R sup. epigastric a. to R internal thoracic a. to R su
All of the above.
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