alexa Reversal of profound rocuronium neuromuscular blockade by sugammadex in anesthetized rhesus monkeys.
Anesthesiology

Anesthesiology

Journal of Anesthesia & Clinical Research

Author(s): de Boer HD, van Egmond J, van de Pol F, Bom A, Booij LH

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Abstract BACKGROUND: Reversal of neuromuscular blockade can be accomplished by chemical encapsulation of rocuronium by sugammadex, a synthetic gamma-cyclodextrin derivative. The current study determined the feasibility of reversal of rocuronium-induced profound neuromuscular blockade with sugammadex in the anesthetized rhesus monkey using train-of-four stimulation. METHODS: Four female rhesus monkeys each underwent three experiments. In each experiment, first, a 100-microg/kg dose of rocuronium was injected and spontaneous recovery was monitored. After full recovery, a 500-microg/kg dose of rocuronium was injected. Up to this point, all three experiments in a single monkey were identical. One minute after this rocuronium injection, either one of the two tested dosages of sugammadex (1.0 or 2.5 mg/kg) was injected or saline was injected. RESULTS: Injection of 100 microg/kg rocuronium resulted in a mean neuromuscular blockade of 93.0\% (SD = 4\%), and profound blockade was achieved by injection of 500 microg/kg. In all experiments, a 100\% neuromuscular blockade was achieved at this dose. After injection of the high rocuronium dose, the 90\% recovery of the train-of-four ratio took 28 min (SD = 7 min) after saline, 26 min (SD = 9.5 min) after 1 mg/kg sugammadex, and 8 min (SD = 3.6 min) after 2.5 mg/kg sugammadex. Signs of residual blockade or recurarization were not observed. Injection of sugammadex had no significant effects on blood pressure or heart rate. CONCLUSIONS: Chemical encapsulation of rocuronium by sugammadex is a new therapeutic mechanism allowing effective and rapid reversal of profound neuromuscular blockade induced by rocuronium in anesthetized rhesus monkeys.
This article was published in Anesthesiology and referenced in Journal of Anesthesia & Clinical Research

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