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REGIONAL ANESTHESIA AND PAIN MEDICINE

The Superiority of Water-Diluted 0.25% to Neat 1% Lidocaine for Trigger-Point Injections in Myofascial Pain Syndrome: A Prospective, Randomized, Double-Blinded Trial

Hiroshi Iwama, MD^*, and Yoichi Akama, MD

*Department of Anesthesiology, Central Aizu General Hospital, Aizuwakamatsu; and Department of Anesthesiology, South Tohoku Hospital, Iwanuma, Miyagi, Japan

Address correspondence and reprint requests to Hiroshi Iwama, MD, Department of Anesthesiology, Central Aizu General Hospital, 1-1 Tsuruga-machi, Aizuwakamatsu City 965-0011, Japan.

Implications: Trigger-point injection with a mixture of commercially available 1% lidocaine in sterile distilled water at a ratio of 1:3 compared with 1% lidocaine alone resulted in better efficacy and less injection pain. This simple procedure may be suitable for treatments of a wide range of myofascial pain syndromes.

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