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Magnesium had an inhibitory effect on neuromuscular transmission and caused a decrease in muscle fiber membrane excitability. It reduces the amount of acetylcholine that is released at the motor nerve terminal by decreasing the calcium conductance of presynaptic voltage-dependent calcium channels. After pre-treatment with magnesium, an increased speed of onset and a prolongation of the recovery period of neuromuscular blockade have been observed with other non-depolarizing neuromuscular blocking agent (NMBA) such as atracurium, vecuronium and rocuronium. Rocuronium is the currently preferred NMBA used as an alternative to succinylcholine for rapid tracheal intubation. As an alternative to succinylcholine, high doses of NMBA have been tested for rapid sequence intubation. This excessively high dose of rocuronium, however, prolongs the duration of the neuromuscular block and this may not be warranted in every surgical setting.
The reduction of onset time of rocuronium by magnesium pre-treatment can make intubation condition more rapid and much better clinically. It will thus be interesting to compare intubation conditions of a standard intubation dose of rocuronium after magnesium pre-treatment with high dose of rocuronium or standard dose of rocuronium.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator)
Easy of Laryngoscopy Manipulation
magnesium sulphate, normal saline, normal saline
Seoul National University Bundang Hospital
Korea, Republic of
Not yet recruiting
Seoul National University Bundang Hospital
Published on BioPortfolio: 2014-08-27T03:12:35-0400
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A genus of HALOBACTERIACEAE distinguished from other genera in the family by the presence of specific derivatives of TGD-2 polar lipids. Haloarcula are found in neutral saline environments such as salt lakes, marine salterns, and saline soils.
A family of gram-negative, moderately halophilic bacteria in the order Oceanospirillales. Members of the family have been isolated from temperate and Antarctic saline lakes, solar salt facilities, saline soils, and marine environments.
A nutritional condition produced by a deficiency of magnesium in the diet, characterized by anorexia, nausea, vomiting, lethargy, and weakness. Symptoms are paresthesias, muscle cramps, irritability, decreased attention span, and mental confusion, possibly requiring months to appear. Deficiency of body magnesium can exist even when serum values are normal. In addition, magnesium deficiency may be organ-selective, since certain tissues become deficient before others. (Harrison's Principles of Internal Medicine, 12th ed, p1936)
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