Which of the following best describes the HVPC waveform and pulse duration used in wound healing?

• A. Biphasic pulses with long duration
• B. High-voltage monophasic pulses with short duration (roughly 40-100 μs)
• C. Direct current with long continuous duration
• D. Alternating current with variable duration

Answer: (B)

High-voltage pulsed current for wound healing uses short, high-amplitude monophasic pulses. Each pulse delivers a single polarity, with a pulse duration that is very brief—typically in the tens of microseconds range (roughly 40–100 μs). The high voltage lets you deliver a strong instantaneous field and depth of effect while keeping the average current low, which helps with comfort and safety. This combination is distinct from continuous direct current, alternating current, or biphasic waveforms, which do not match the short-duration, single-polarity pulsed pattern described.