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Pain Research and Treatment
Volume 2014, Article ID 146750, 10 pages
Review Article

Etiology and Use of the “Hanging Drop” Technique: A Review

1Department of Anesthesiology, Memorial Hospital of Rhode Island, Alpert Medical School, Brown University, 111 Brewster Street, Pawtucket, RI 02860, USA
2Department of Anesthesiology, University of Illinois at Chicago College of Medicine, Jesse Brown VA Hospital, 820 S Damen Avenue, Chicago, IL 60612, USA

Received 9 January 2014; Revised 21 March 2014; Accepted 21 March 2014; Published 15 April 2014

Academic Editor: Donald A. Simone

Copyright © 2014 Ludmil Todorov and Timothy VadeBoncouer. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Supplementary Material

Demonstration of the hanging drop technique. As the needle enters the epidural space the pressure at the tip decreases below atmospheric level. This results in aspiration of the fluid from the hub.

  1. Supplementary Material