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Diathermy Return Electrode — FRCA Primary MCQ

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EasyPhysics & Clinical MeasurementDiathermy Return ElectrodeFRCA Primary

In monopolar diathermy the return electrode should:

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Correct answer: D — Have a large contact area to reduce current density and prevent burns

The dispersive electrode must have large contact area to reduce current density. It should be placed over well-vascularised muscle near the surgical site. In bipolar diathermy no return electrode is needed as current passes between the two instrument tips.

Reference: Al-Shaikh Stacey 2019 Essentials of Anaesthetic Equipment