Electrical microshock — FRCA Primary MCQ

Correct answer: C — Microshock through an intracardiac conductor

Microshock refers to very small currents applied directly to the myocardium through an intracardiac conductor. Heat and moisture exchanger is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Scavenging system is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Non-interchangeable screw thread is less appropriate because it would fit a different clinical clue or a separate anaesthetic problem. Pressure transducer damping 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