Question

High Frequency and alternating current are characteristics of which type of electrotherapy?

1) TENS therapy
2) Ultrasound therapy
3) Interferential therapy
4) All of the above

Answer 1

Interferential therapy is the electrotherapy mode characterized by high frequency and alternating current. Ultrasound therapy also uses high-frequency sound waves, but primarily for thermal effects on tissues to relieve pain and improve flexibility in muscles.

Step-by-step explanation:

The type of electrotherapy that is characterized by high frequency and alternating current is Interferential therapy. While ultrasound therapy does also use high-frequency sound waves, they are not the same as the electrical currents used in interferential therapy.

Ultrasound therapy uses sound waves, typically in frequencies of 0.8 to 1 MHz, to penetrate tissue and is mainly used for its thermal effects to treat injured or overworked muscles. It requires skill by the therapist to apply the treatment effectively and avoid potential tissue damage like 'bone burns' caused by overheating and cavitation.