Chemistry & Electricity第 87 / 100 题
Before using a high-frequency device, which precaution is most important?
a.Applying an alcohol-based toner right before contact to boost conductivity
b.Having the client hold a metal object to complete the circuit
c.Using it over open, bleeding extraction sites for a germicidal effect
d.Keeping alcohol and other flammable products away from the electrode, and screening for contraindications such as pregnancy, a pacemaker, epilepsy, or asthma
解析
High-frequency electrodes produce a spark, so flammable alcohol-based products must be removed from the area first, and clients who are pregnant or who have a pacemaker, epilepsy, or asthma should not receive the service. The device is used on intact skin with a light germicidal and drying effect, not on open bleeding sites, and no metal object is held by the client.
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