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(Stroke. 1970;1:104.)
© 1970 American Heart Association, Inc.

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Retrieval of a Thrombus Attached to a Cournand Needle

LOUIS M. DYLL M.D.¹; JAMES W. DYLL M.D.²; ROBERT J. SPEER PH.D.³

¹ Department of Neurology
² Department of Neurosurgery
³ Biochemistry Department, Baylor University Medical Center, Dallas, Texas

Upon completion of a carotid angiogram, a clot of platelets, leukocytes, erythrocytes and fibrin was found attached to a No. 18 gauge Cournand needle. The chance retrieval of this thrombus establishes the occurrence of thrombus formation on angiographic needles. Such thrombi could be the source of some post-angiographic infarctions and are consistent with current concepts of clotting.

Key Words: complication of cerebral angiogram • cerebral embolus and infarction • thrombosis mechanisms