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Spinal Anesthesia with Tetracaine—Effect of Added Vasoconstrictors

Department of Anaesthetics, Royal Infirmary, Lauriston Place, Edinburgh, EH3 9YW, Scotland.

Abstract

The effect of adding 0.2 ml of 1:1000 epinephrine or 0.5 ml of 1% phenylephrine to 1.5 ml of 1% tetracaine for spinal anesthesia was assessed in 30 patients in a double-blind study. Phenylephrine but not epinephrine produced a significant prolongation of sensory loss in the T12 dermatome. Both vasoconstrictors produced a significant prolongation of the total duration of sensory and motor blockade. These findings differ from those in previous studies in which lidocaine and bupivacaine were used.

Key Words: ANESTHETIC TECHNIQUES: spinal • ANESTHETICS, Local: tetracaine

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