These are both produced by complicated apparatus and are forms of high-potential electricity which can be safely administered only by an expert. A nurse's duty will consist in preparing a patient for such treatment by seeing that she is appropriately dressed in loose warm clothing, free from all metal such as hair pins, brooches, safety pins, etc., which tend to "spark" and alarm the patient unnecessarily.


The high-frequency current is widely employed in various conditions. Its most marked therapeutic actions seem to be in the reduction of blood pressure, relief of neuralgic pain, and in conditions where absorption of inflammatory conditions is required, as in eczema, lupus, and acne.