skip to main content

TOF 0.9 Standard — FRCA Primary MCQ

Instant feedback + full explanation. One question, done properly.

EasyPhysics & Clinical MeasurementTOF 0.9 StandardFRCA Primary

TOF ratio ≥ 0.9 is required for adequate recovery from non-depolarising block. Which of the following is true at TOF 0.7?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: E — Residual weakness with impaired pharyngeal function and aspiration risk exists

TOF 0.7 was historically considered adequate but is now known to be associated with residual weakness / impaired pharyngeal function / increased aspiration risk / and postoperative pulmonary complications. TOF ≥ 0.9 is the current standard for safe extubation.

Reference: Peck Hill Williams 2014 Pharmacology for Anaesthesia and Intensive Care