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MALIGNANT HYPERTHERMIA:ORGANON 9426 WAS EVALUATED IN 10 mhs PIGS AND 8 CONTROL PIGS
Author(s) -
Williams Charles
Publication year - 2015
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.29.1_supplement.1039.1
Subject(s) - medicine , anesthesia , malignant hyperthermia , halothane , blockade , pharmacology , chemistry , receptor
Control pigs required 109.9 ug/kg/min and MHS pigs required 72.4 ug/kg/min infusion of ORG 9426 to maintain a 90% block. It appears that ORG 9426 is only one‐third to one‐half as potent as Vecuronium in pigs. The fact that MHS pigs only required 66% of the infusion dose to maintain a 90% block suggests that there is a marked difference in the neuromuscular effect of ORG 9426 in MHS vs control pigs. A linear regression analysis of the dose response data to ORG 9426 in MHS pigs indicated that 427.033 ug/kg would be required to produce a 100% neuromuscular blockade vs 586.31 ug/kg in control pigs. Nine of the ten MHS pigs did not develop MH or show any signs of impending MH during the halothane and succinylcholine challenge at the end of the infusion period. Organon 9426 is the first muscle relaxant to offer significant protective action at a clinical dose. This suggests that there is an allosteric site on the sodium channel (acetylcholine receptor) which regulates the flow of sodium ions through the sodium channel. Organon 9426 may be therapeutically effective in an active MH case.