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  • Title: Comparison of succinylcholine with two doses of rocuronium using a new method of monitoring neuromuscular block at the laryngeal muscles by surface laryngeal electromyography.
    Author: Hemmerling TM, Schmidt J, Wolf T, Klein P, Jacobi K.
    Journal: Br J Anaesth; 2000 Aug; 85(2):251-5. PubMed ID: 10992834.
    Abstract:
    We compared the onset of neuromuscular block with succinylcholine (1 mg kg-1) and two doses of rocuronium (0.6 and 0.9 mg kg-1) at the adductor pollicis muscle using electromyography (EMG) and acceleromyography (AMG), and at the adductor laryngeal muscles with a new electromyographic method using a disposable surface electrode attached to the cuff of a tracheal tube. At the larynx, the mean (+/- SD) time to 90% block and the onset time of succinylcholine (38 +/- 15 and 47 +/- 19 s, respectively) were significantly shorter (P < 0.01) than for rocuronium 0.6 mg kg-1 (92 +/- 42 and 106 +/- 38 s) and rocuronium 0.9 mg kg-1 (52 +/- 31 and 64 +/- 30 s). We found that, with comparable degrees of neuromuscular block, the onset time of succinylcholine at the adductor pollicis was significantly shorter (P < 0.01) than for rocuronium 0.6 mg kg-1 and 0.9 mg kg-1 (EMG, 80 +/- 39 vs 145 +/- 48 s and 99 +/- 31 s; AMG, 90 +/- 39 vs 124 +/- 53 s and 106 +/- 38 s). Clinical duration at the adductor pollicis (AMG) was significantly longer (P < 0.01) for both rocuronium groups than for succinylcholine (T4:T1 = 0.7, 54 +/- 18 and 77 +/- 21 vs 8 +/- 6 min). The surface laryngeal electrode proved non-invasive, easy to use and reliable in measuring onset of the neuromuscular block at the larynx.
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