NIST connector — FRCA Primary MCQ

Correct answer: A — Non-interchangeable screw thread

NIST connectors reduce pipeline misconnections. Microshock through an intracardiac conductor is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Hypoxic guard is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Pin index system is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Oxygen-enriched fire risk is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. In Primary FRCA physics and measurement, the safest answer is the one that follows the underlying physical principle and the limitations of the device.

Reference: Davis and Kenny Basic Physics and Measurement in Anaesthesia; RCoA Primary FRCA syllabus