Lymphatic drainage equipment is powered by which type of current?

• A. Alternating current.
• B. Direct current.
• C. Pulsed direct current.
• D. Battery power

Answer: (A)

Lymphatic drainage equipment uses alternating current because it provides a safe, gentle, rhythmic stimulation that encourages lymph movement without causing a net buildup of charge in the tissue. The current reverses direction, so there’s no continuous electrochemical effect at the skin–electrode interface, reducing the risk of irritation or burns. This low-frequency, alternating stimulation creates subtle, pulsed contractions in the lymphatics, helping to move fluid efficiently. In contrast, direct current would push ions in one direction, increasing skin irritation and potential tissue damage, and pulsed direct current still uses one polarity during the pulse. Battery power is just a power source, not the type of current delivered.