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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 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.
Neuromuscular-blocking drugs, ... Clinical duration of action (time from drug administration to recovery of single twich to 25% of baseline) is 7-12 minutes.
The British Journal of Anaesthesia published an article in 2015 in which the incidence of residual neuromuscular blockade could be reduced to zero if sugammadex is used as the reversal agent and the correct dosage is selected with the use of neuromuscular monitoring. [17]
Intraoperative neurophysiological monitoring (IONM) or intraoperative neuromonitoring is the use of electrophysiological methods such as electroencephalography (EEG), electromyography (EMG), and evoked potentials to monitor the functional integrity of certain neural structures (e.g., nerves, spinal cord and parts of the brain) during surgery.
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)
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 glycopyrrolate. To minimize residual blockade, reversal ...
Novel neuromuscular blockade reversal agents such as sugammadex may also be used; it works by directly binding muscle relaxants and removing it from the neuromuscular junction. Sugammadex was approved for use in the United States in 2015, and rapidly gained popularity.