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Anesth Analg 2007; 105:1164-1166
© 2007 International Anesthesia Research Society
doi: 10.1213/01.ane.0000281935.78144.82
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ANALGESIA

The EpisureTM Syringe: A Novel Loss of Resistance Syringe for Locating the Epidural Space

Edward T. Riley, MD, and Brendan Carvalho, MBBCh, FRCA

From the Department of Anesthesia, Stanford University, Stanford, California.

Address correspondence and reprint requests to Edward T. Riley, MD, Department of Anesthesia, Stanford University Medical Center, 300 Pasteur Ave., Stanford, CA 94305. Address e-mail to edriley{at}stanford.edu.

Abstract

INTRODUCTION: The Episure syringeTM is a unique spring-loaded loss-of-resistance (LOR) syringe with a coaxial compression spring within a Portex PulsatorTM LOR syringe. This syringe supplies a constant pressure while the operator is advancing the Tuohy needle.

METHODS: We evaluated the syringe using an artificial model of the ligamentum flavum, an anesthetized pig, and women who desired epidural analgesia for labor.

RESULTS: The operator, using the spring-loaded syringe, was able to stop the forward movement of the needle, so that compared with a standard LOR syringe less of the needle protruded out the back of the laboratory model. Satisfactory labor analgesia in the human study and radiograph analyses in the porcine model confirmed epidural placement in all attempts.

CONCLUSION: The spring-loaded syringe is a potentially useful LOR syringe that provides a reliable, objective end-point for identification of the epidural space.






Lippincott, Williams & Wilkins Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins with the assistance of Stanford University Libraries' HighWire Press®. Copyright 2006 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999 HighWire Press
Copyright © 2007 by the International Anesthesia Research Society.