Final answer:
High Frequency Electrotherapy is the type of electrotherapy involving thermal current with a high rate of oscillation commonly used in skin and scalp treatments. This method results in a mild thermal effect, promoting blood circulation, skin repair, and product absorption during facial treatments.
Step-by-step explanation:
The type of electrotherapy that involves a thermal current with a high rate of oscillation or vibration, and is commonly used for scalp and facial treatments, is referred to as High Frequency Electrotherapy. This technique utilizes alternating current to generate a high frequency wave, typically in the range of millions of cycles per second. Because of the swift oscillation, this therapy creates heat and has a mild thermal effect, which can promote better blood circulation, encourage cellular turnover, and assist in the treatment of various conditions of the skin and scalp.
During the procedure, a glass electrode is applied to the skin, and as the current passes through the gas within the electrode, a subtle glow can be observed along with the generation of warmth. This type of electrotherapy is frequently used in beauty treatments to help sterilize and heal the skin. The thermal effect contributes to a soothing sensation and can assist in the absorption of skin care products.
In relation to surgery, when high-frequency currents are used with a metal scalpel, one can expect most of the current to flow from the sharp edge due to the concentration of electric fields at pointed objects, which causes a higher current density and thus an effective incision. High-frequency AC is typically used in such scenarios to minimize the damage to surrounding tissues and to coagulate blood to reduce bleeding.