Neuromuscular Blockade
Pharmacological inhibition of neuromuscular transmission used to produce skeletal muscle relaxation and facilitate airway management during general anesthesia.
Full Definition
Neuromuscular blocking agents (NMBAs) interrupt acetylcholine signalling at the neuromuscular junction, causing paralysis of skeletal muscles including the diaphragm. In dental anesthesiology, NMBAs are employed for procedures requiring deep muscle relaxation or when laryngoscopy conditions must be optimized. They are classified as depolarising (e.g., succinylcholine) or non-depolarising (e.g., rocuronium). Because patients cannot breathe independently under full blockade, reversal and monitoring via train-of-four testing are essential before extubation. Editors should not abbreviate 'neuromuscular blockade' as 'NMB' without prior expansion.
Usage
Usage note: Distinguish from 'nerve block,' which is a regional technique; neuromuscular blockade is a systemic pharmacological effect.
In Context
- "Succinylcholine was administered to facilitate rapid-sequence intubation, providing complete neuromuscular blockade within 60 seconds." — Anesthesia record
- "Adequate reversal of neuromuscular blockade was confirmed by train-of-four ratio ≥0.9 prior to extubation." — Post-operative anesthesia note