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Brown: Atlas of Regional Anesthesia, 3rd ed.,
Copyright © 2006 Saunders, An Imprint of Elsevier
Epidural catheter designs. A, Single distal orifice. B, Closed tip with multiple side orifices. (A and B From Brown DL. Regional Anesthesia and Analgesia. Philadelphia, W.B. Saunders, 1996. By permission of the Mayo Foundation.)