CONTEXT: Intravenous magnesium deepens non-depolarising neuromuscular block. OBJECTIVE: To assess whether intravenous magnesium has the potential to re-establish paralysis in patients who have just recovered from a non-depolarising neuromuscular block. DESIGN: Prospective randomised double-blind controlled study. PATIENTS: Twenty non-obese patients ranging in age from 18 to 80 years were enrolled. Exclusion criteria were a history of liver, kidney or neuromuscular disease and intake of medications interacting with neuromuscular blocking agents. INTERVENTION: After spontaneous recovery from an intubating dose of rocuronium had been achieved (train-of-four ratio ≥0.9), patients were given either a bolus dose of magnesium 50 mg kg(-1) intravenously or an equivalent volume of isotonic saline over 5 min. MAIN OUTCOME MEASURES: The train-of-four ratio was measured every minute until the end of surgery. The primary endpoint was the proportion of patients who experienced a decrease in train-of-four ratio following administration of magnesium or saline. RESULTS: Following infusion of the study solution, the train-of-four ratio decreased in all patients in the magnesium group in contrast to none in the saline group (P<0.001). On average, magnesium-induced train-of-four ratio depression reached a nadir of 0.49 after 10 min and lasted for 45 min. CONCLUSION: A bolus dose of intravenous magnesium 50 mg kg(-1) re-establishes a clinically relevant degree of muscle paralysis in patients who have just recovered from a non-depolarising neuromuscular block. TRIAL REGISTRATION: EudraCT.ema.europa.eu 2009-017372-24.
RCT Entities:
CONTEXT: Intravenous magnesium deepens non-depolarising neuromuscular block. OBJECTIVE: To assess whether intravenous magnesium has the potential to re-establish paralysis in patients who have just recovered from a non-depolarising neuromuscular block. DESIGN: Prospective randomised double-blind controlled study. PATIENTS: Twenty non-obesepatients ranging in age from 18 to 80 years were enrolled. Exclusion criteria were a history of liver, kidney or neuromuscular disease and intake of medications interacting with neuromuscular blocking agents. INTERVENTION: After spontaneous recovery from an intubating dose of rocuronium had been achieved (train-of-four ratio ≥0.9), patients were given either a bolus dose of magnesium 50 mg kg(-1) intravenously or an equivalent volume of isotonic saline over 5 min. MAIN OUTCOME MEASURES: The train-of-four ratio was measured every minute until the end of surgery. The primary endpoint was the proportion of patients who experienced a decrease in train-of-four ratio following administration of magnesium or saline. RESULTS: Following infusion of the study solution, the train-of-four ratio decreased in all patients in the magnesium group in contrast to none in the saline group (P<0.001). On average, magnesium-induced train-of-four ratio depression reached a nadir of 0.49 after 10 min and lasted for 45 min. CONCLUSION: A bolus dose of intravenous magnesium 50 mg kg(-1) re-establishes a clinically relevant degree of muscle paralysis in patients who have just recovered from a non-depolarising neuromuscular block. TRIAL REGISTRATION: EudraCT.ema.europa.eu 2009-017372-24.
Authors: Mohammad R Ghodraty; Amir A Saif; Ali R Kholdebarin; Faranak Rokhtabnak; Ali R Pournajafian; Ali R Nikzad-Jamnani; Anjan Shah; Nader D Nader Journal: J Anesth Date: 2012-07-03 Impact factor: 2.078
Authors: Waynice N Paula-Garcia; Gustavo H Oliveira-Paula; Hans Donald de Boer; Luis Vicente Garcia Journal: BMC Anesthesiol Date: 2021-03-27 Impact factor: 2.217