Which of the following is a key safety check before using a home-use electrotherapy device?

• A. Increase amplitude to tolerance
• B. Skip skin checks
• C. Verify device safety features and locks
• D. Use only manufacturer-supplied batteries

Answer: (C)

Verifying the device’s safety features and locks is the essential precaution before using a home-use electrotherapy unit. This check ensures the device will respond safely to user settings and conditions, with protections like automatic shut-off, current limits, impedance checks, and locking mechanisms preventing accidental or unsafe changes. When these features are functioning, the device is much less likely to deliver harmful levels of current or continue operation if something goes wrong, reducing the risk of burns, shocks, or other injury. In contrast, turning the amplitude up to a high tolerance ignores safety limits, skipping skin checks neglects tissue condition and electrode contact, and relying on manufacturer batteries addresses power supply but doesn’t guarantee that protective safeguards are active.