Residual Neuromuscular Blockade
Also written as: RNMB — Residual Neuromuscular Blockade
Incomplete reversal of neuromuscular blocking agents persisting into the post-anesthetic period, posing risks of airway compromise and hypoventilation.
Full Definition
Residual neuromuscular blockade (RNMB) occurs when paralytic agents have not been fully metabolised or pharmacologically reversed at the time of extubation. Even subtle residual blockade—defined as a train-of-four ratio below 0.9—impairs upper airway muscle function, reduces hypoxic ventilatory response, and increases aspiration risk. In dental office-based anesthesia, where rapid turnover is expected, the risk of RNMB must be addressed through appropriate monitoring and reversal strategies such as neostigmine-glycopyrrolate or sugammadex. Editors should avoid the colloquial shorthand 'wearing off' in clinical documents.
Usage
Usage note: Abbreviate as RNMB only after full expansion; do not conflate with post-operative sedation, which is a CNS rather than neuromuscular phenomenon.
In Context
- "Residual neuromuscular blockade was suspected when the patient exhibited paradoxical breathing and weak grip strength in the recovery area." — Post-anesthetic care unit note
- "The clinical guidelines require documentation that residual neuromuscular blockade was excluded before transfer from the dental operatory." — Office-based anesthesia protocol