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  • Title: Reversal of mivacurium-induced neuromuscular blockade with a cholinesterase inhibitor: A systematic review.
    Author: Brinch JHW, Söderström CM, Gätke MR, Madsen MV.
    Journal: Acta Anaesthesiol Scand; 2019 May; 63(5):564-575. PubMed ID: 30548256.
    Abstract:
    BACKGROUND: Mivacurium is a short-acting non-depolarizing muscle relaxant, which is hydrolyzed by butyrylcholinesterase. The neuromuscular block (NMB) can be antagonized with cholinesterase inhibitors (CHEI), but the short duration of action of mivacurium questions the need. This systematic review evaluated if the use of CHEIs (neostigmine, pyridostigmine or edrophonium) facilitates reversal of mivacurium-induced NMB. METHOD: Randomized controlled trials and crossover-studies comparing spontaneous recovery with CHEI reversal in patients with mivacurium-induced NMB, assessed with quantitative neuromuscular monitoring, were included. Mean time from injection of the CHEI or allowing of spontaneous recovery to an endpoint representing full recovery was used as outcome. First response to train-of-four nerve stimulation (T1 ) described the level of NMB for administration of the CHEI. Moderate NMB refers to T1  ≥ 5% and deeper NMB refers to T1  < 5%. Systematic critical appraisal was performed using the Scottish Intercollegiate Guidelines Network guidelines. Overall quality assessment was done using the Grading of Recommendations Assessment, Development and Evaluation approach. RESULTS: Sixteen studies with data from 546 patients were included. Low quality of evidence was found that neostigmine and edrophonium administered at moderate NMB accelerated recovery with up to approximately 5.5-6.5 and 6.5-9.0 minutes, respectively. At deeper NMB only edrophonium accelerated recovery. The effect of neostigmine was not clarified at deeper mivacurium-induced NMB. No studies with reversal by pyridostigmine were identified. CONCLUSION: Low quality of evidence supports that neostigmine and edrophonium accelerate the recovery of mivacurium-induced NMB with 5-6.5 and 6-9.0 minutes respectively, when administered at moderate NMB. At deeper NMB only edrophonium accelerated the recovery.
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