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A meta-analysis reported that the incidence of residual neuromuscular paralysis was 41% in patients receiving intermediate neuromuscular blocking agents during anaesthesia. [1] It is possible that > 100,000 patients annually in the USA alone, are at risk of adverse events associated with undetected residual neuromuscular blockade. [ 5 ]
Neuromuscular-blocking drugs, or Neuromuscular blocking agents (NMBAs), block transmission at the neuromuscular junction, [1] causing paralysis of the affected skeletal muscles. This is accomplished via their action on the post-synaptic acetylcholine (Nm) receptors.
Neuromuscular monitoring is recommended when neuromuscular-blocking drugs have been part of the general anesthesia and the doctor wishes to avoid postoperative residual curarization (PORC) in the patient, that is, the residual paralysis of muscles stemming from these drugs.
Effective neuromuscular block by non-depolarizing neuromuscular drugs occurs only when 70-80% of acetylcholine receptors are occupied by the drug. [11] This is because at this occupancy rate, junctional potential cannot reach the threshold value required for muscle contraction. Diagram of nicotinic receptor (Acetylcholine receptor)
Use during pregnancy appears to be safe for the baby. [10] Suxamethonium is in the neuromuscular blocker family of medications and is of the depolarizing type. [7] It works by blocking the action of acetylcholine on skeletal muscles. [7] Suxamethonium was described as early as 1906 and came into medical use in 1951. [5]
Sugammadex has been shown to have affinity for two other aminosteroid neuromuscular blocking agents, vecuronium and pancuronium. Although sugammadex has a lower affinity for vecuronium than for rocuronium, reversal of vecuronium is still effective because fewer vecuronium molecules are present in vivo for equivalent blockade: vecuronium is ...
Sodium thiopental is an ultra-short-acting barbiturate and has been used commonly in the induction phase of general anesthesia.Its use has been largely replaced with that of propofol, but may retain some popularity as an induction agent for rapid-sequence induction and intubation, such as in obstetrics. [12]
It is unclear if use in pregnancy is safe for the baby. [2] Vecuronium is in the aminosteroid neuromuscular-blocker family of medications and is of the non-depolarizing type. [2] It works by competitively blocking the action of acetylcholine on skeletal muscles. [2] The effects may be reversed with sugammadex or a combination of neostigmine and ...