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  • Title: Rocuronium is the best non-depolarizing relaxant to prevent succinylcholine fasciculations and myalgia.
    Author: Martin R, Carrier J, Pirlet M, Claprood Y, Tétrault JP.
    Journal: Can J Anaesth; 1998 Jun; 45(6):521-5. PubMed ID: 9669004.
    Abstract:
    PURPOSE: To determine which non-depolarizing relaxant among d-tubocurarine, vecuronium, atracurium, mivacurium and rocuronium prevented muscular fasciculations and myalgia following succinylcholine. METHODS: In this double blind randomized study, 120 female patients scheduled for laparoscopic procedures were studied. They were divided into six groups of 20 according to the non-depolarizing pretreatment used: NaCl 0.9% (control), 0.05 mg.kg-1 d-tubocurarine, 0.01 mg.kg-1 vecuronium, 0.05 mg.kg-1 atracurium, 0.02 mg.kg-1 mivacurium and 0.06 mg.kg-1 rocuronium. Four minutes after the pretreatment, 1.5 mg.kg-1 succinylcholine was injected. Side effects of the pretreatment, the presence and magnitude of fasciculations, the ease of tracheal intubation, myalgia 1, 24 and 48 hr after surgery were observed. A Puritan Bennett Datex 221 NMT Relaxograph monitor was used to evaluate the neuromuscular block. RESULTS: Muscle fasciculations were observed in 19 of the 20 patients in the control group and in 3 of the 20 patients in the rocuronium group, the best of the pretreatments in that aspect. Four patients in the mivacurium group were unable to sustain more than four seconds head-lift after pretreatment (P < 0.05). Tracheal intubation conditions were better and the onset of block was faster and longer after succinylcholine in the control group (P < 0.05). Myalgias were present in 71% of the patients 24 hr postoperatively and the frequency was not different among the groups. CONCLUSION: Among the pretreatments tested, 0.06 mg.kg-1 rocuronium was the best to prevent muscular fasciculations following succinylcholine injection. In the population studied, pretreatment did not prevent postoperative myalgia. Succinylcholine 1.5 mg.kg-1 was more effective without a non-depolarizing pretreatment.
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