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Laryngeal Adductors More Resistant — FRCA Primary MCQ

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HardPharmacology - NeuromuscularLaryngeal Adductors More ResistantFRCA Primary

Compared with the adductor pollicis, how do the laryngeal adductors respond to a standard non-depolarising neuromuscular-blocking dose?

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Correct answer: C — Laryngeal adductors are relatively resistant to non-depolarising block

The best answer is “Laryngeal adductors are relatively resistant to non-depolarising block”. The laryngeal adductors are relatively resistant to non-depolarising block compared with the adductor pollicis, although onset characteristics differ between muscle groups. Peripheral monitoring must therefore be interpreted in context. Recovery of a train-of-four ratio of at least 0.9 at the adductor pollicis is used to support safe recovery of upper-airway muscle function.

Reference: Rocuronium bromide, UK Summary of Product Characteristics: https://www.medicines.org.uk/emc/product/8841/smpc