Oregon Esthetician State Board

What current type does a high frequency machine utilize?

1. Direct current

2. Pulse current

3. Repetitive alternating current

4. Static current

The correct answer is: Repetitive alternating current

The high frequency machine primarily utilizes repetitive alternating current. This type of current alternates its direction rapidly, producing a high-frequency oscillation that can create therapeutic effects on the skin. In esthetics, high frequency machines are commonly used for various treatments, including acne management, enhancing skin metabolism, and stimulating circulation. The oscillation produces a thermal effect that helps in the sterilization of the skin's surface, thereby reducing bacteria and promoting healing. Each of the other types of current plays a different role. Direct current flows steadily in one direction and is often used for specific galvanic treatments. Pulse current, which consists of interruptions in the flow of electricity, is used in certain electrical modalities for muscle re-education or stimulation. Static current, while it can impact charged particles, does not provide the same benefits for skin treatments as the alternating current used in high frequency machines. Therefore, the repetitive alternating current is the most effective and commonly used type for the applications of a high frequency machine in esthetic practices.