NIST Pipeline Safety — FRCA Primary MCQ

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ModeratePhysics & Clinical MeasurementNIST Pipeline SafetyFRCA Primary

The non-interchangeable screw thread (NIST) system is a safety feature on:

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Correct answer: E — Pipeline connections at the anaesthetic machine

NIST connections are specific to each gas at the point where pipeline hoses connect to the anaesthetic machine. Each gas has a unique probe and socket combination preventing misconnection. The pin-index safety system serves a similar purpose for cylinder yoke connections. The Diameter Index Safety System (DISS) is used in the USA.

Reference: Al-Shaikh Stacey 2019 Essentials of Anaesthetic Equipment