Administration of tubocurarine, pancuronium, gallamine, or decamethonium into the cisterna magna of chloralosed dogs induced a rise in blood pressure. Clonidine (3 micrograms/kg) administered into the cisterna magna after tubocurarine, pancuronium, or gallamine significantly increased blood pressure; no significant change was found after decamethonium. The pressor response to clonidine after tu...

The effects of 4-aminopyridine (a non-anticholinesterase antagonist of curare-like agents) on the evoked muscle action potentials (EMAP) in a patient with Eaton Lambert Syndrome are reported. On two separate occasions the i.v. administration of 0.31 mg kg(-1) and 0.62 mg kg(-1) was followed by a 300% increase of EMAP for about 2 h without serious side-effects.

Rapid sequence induction is necessary in emergency surgical operations to lessen the chance of aspiration of stomach contents. Succinylcholine usually is the relaxant of choice, because of its rapid onset. However, succinylcholine has side effects which may result in potentially life-threatening conditions. The purpose of this study was to compare two short-acting non-depolarizing muscle relaxa...

The characteristics of neuromuscular block produced by alpha-bungarotoxin, a post-junctionally active polypeptide toxin purified from snake venoms, have been studied in vivo in 12 anaesthetized cats, using the sciatic nerve-tibialis anterior muscle preparation. The onset of the neuromuscular block was slow and without fasciculation. The block was persitently progressive. The time course of the ...

BACKGROUND Burned patients are usually resistant to the neuromuscular effects of nondepolarizing relaxants, mostly because of receptor changes. The magnitude of the resistance is related to burn size and time after burn. Mivacurium is a muscle relaxant, degraded by plasma cholinesterase, whose enzyme activity is decreased in burns. The present study tested the hypothesis that burn-induced depre...

Rocuronium is a new nondepolarizing neuromuscular blocking drug. Its onset of action is comparable to that of succinylcholine, with good-to-excellent intubating conditions possible 1 minute after doses two times the ED95 (600 pg/kg). The ED9a of rocuronium is essentially the same for children as for adults. Its duration of action is similar to vecuronium, and it is shorter for children than for...

The decrease of “functional” endplate receptors in MG can decrease the response to the chemical transmitter acetylcholine, as well as to the depolarizing muscle relaxant succinylcholine. In contrast, the decreased “safety margin” results in a marked sensitivity to nondepolarising relaxants. In normal patients, the wide “safety margin” may explain the slow onset of nondepolarizing block, as well...

Abstract Background A nondepolarizing neuromuscular blocking agent (NMBA) with a succinylcholine-like quick onset and offset has been the holy grail of science blockade. Although this drug is still elusive, advent promising new combinations like rocuronium–sugammadex gantacurium– l -cysteine may achieve same end result. The type NMBA; type, timing, dose their reversal drugs; means monitoring NM...

blocking agent chemically designated as the aminosteroid 2 ß, 16 ß dipiperidino-5α-androstane­ 3α, 17-ß diol diacetate dimethobromide. The structural formula is: PAVULON is supplied as a sterile, isotonic, nonpyrogenic solution for injection. Each mL contains 1 mg or 2 mg pancuronium bromide, 2 mg sodium acetate and 1% benzyl alcohol as preservative. The solution is adjusted to isotonicity with...