Adenosine potentiation of neuromuscular blocking agents in guinea-pigs.
2000
We have investigated the effects of adenosine i.v. on neuromuscular block induced by rocuronium, vecuronium and pipecuronium in an in vivo guinea-pig sciatic nerve-tibialis anterior preparation. The ED50 of each neuromuscular blocker was determined from cumulative log dose-response regression lines (n = 14). In separate experiments, adenosine 0.1 mg kg-1 min-1 or the same volume of 0.9% NaCl was given i.v. via a constant infusion and the ED50 of each neuromuscular blocking agent was then administered (n = 24). Adenosine 0.1 mg kg-1 min-1 increased significantly maximal block induced by the ED50 of these neuromuscular blockers (55-72%, 49-73% and 60-96%, respectively, for rocuronium, vecuronium and pipecuronium; P
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