Which safety feature should be verified on NMES equipment before use?

• A. Impedance monitoring and safety cutoffs are functional.
• B. Battery level is the only concern.
• C. The device's color and font.
• D. The label includes the manufacturer's name.

Answer: (A)

Ensuring the device can monitor skin–electrode impedance and has automatic safety cutoffs is essential before NMES use. Impedance monitoring checks electrode contact and tissue impedance so the device can limit or stop current if contact is poor or impedance spikes, preventing excessive current density and burns. Safety cutoffs act as fail-safes that instantly interrupt current if a fault occurs, such as a short, a fault in wiring, or unsafe stimulation levels. Together, these features keep the therapy within safe limits while the patient is connected.

Battery level affects how long the device can run but doesn't guarantee safety during active stimulation. Cosmetic aspects like color or font, and labels listing the manufacturer, do not influence patient safety during treatment.