Only 1 - 2% of all deep vein thrombus involved the upper extremity; however 12 - 15% of those result in pulmonary embol [1]. Duplex of the upper extremity for detecting deep vein thrombus is more difficult than that of the lower extremity. Possibly, this is because it is not performed as often and evaluation of the quality of the Doppler signals is more difficult. The limited access of these vessels for imaging also contributes to the difficulty.

This talk will address the anatomy and provide suggestions to minimize some of these limitations. The importance of spectral Doppler signals cannot be overemphasized during these studies. Gray scale imaging less effective than color for evaluating the central veins. Those vessels which should be evaluated in the arm will be discussed.

1. Young, JR. Peripheral Vascular Disease, Mosby 1991