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  • Title: Neuromuscular effects of atracurium in man.
    Author: Katz RL, Stirt J, Murray AL, Lee C.
    Journal: Anesth Analg; 1982 Sep; 61(9):730-4. PubMed ID: 6285767.
    Abstract:
    The neuromuscular effects of atracurium were studied in 25 A.S.A. class I or II patients anesthetized by a N2O-O2 narcotic technique. In five patients incremental doses of 0.05 to 0.1 mg/kg of atracurium were given intravenously every 3 minutes until approximately 95% depression of the evoked electromyographic (EMG) response of the adductor policus muscle was produced. This required 0.25 to 0.35 mg/kg of atracurium. The duration of block (return to 95% of control) was 25 to 50 minutes. In addition, four groups of five patients each received 0.15, 0.25, 0.375, or 0.6mg/kg of atracurium. The block produced by 0.15 mg/kg was 10% to 92% and lasted 8 to 55 minutes. The block produced by 0.25, 0.375, and 0.6 mg/kg was 95% or greater with a duration of action of 30 to 68 minutes, 52 to 70 minutes, and 65 to 95 minutes, respectively. Tracheal intubation was easily carried out in all patients in whom there was a block of 90% or greater. The block could be antagonized by the common clinical combination of atropine and neostigmine. Changes in heart rate and blood pressure following atracurium were less than 5%.
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