RT Book, Section A1 Borgeat, Alain A1 Blumenthal, Stephan A2 Hadzic, Admir SR Print(0) ID 3501233 T1 Chapter 25. Interscalene Brachial Plexus Block T2 NYSORA Textbook of Regional Anesthesia and Acute Pain Management YR 2007 FD 2007 PB The McGraw-Hill Companies PP New York, NY SN 9780071449069 LK accessanesthesiology.mhmedical.com/content.aspx?aid=3501233 RD 2024/04/19 AB The first brachial plexus blocks were performed by Halsted, in 1885, at the Roosevelt Hospital in New York City. Later Crile, in 1902, described an “open approach” to expose the plexus to the direct application of cocaine. At the time, however, the clinical applicability of this approach was limited because of the need for surgical exposure of the brachial plexus. Percutaneous access to the brachial plexus was described in the early 1900s. In 1925, Etienne1 reported the successful blockade of the brachial plexus by inserting a needle at the level of the cricothyroid membrane, halfway between the lateral border of the sternocleidomastoid and the anterior border of the trapezius muscle after a single injection through the area around the scalene muscles. This approach is most likely the first clinically useful interscalene block technique.