High-voltage pulsed monophasic generators deliver current to deep tissues without damaging superficial tissues and are used for pain modulation. What type of waveform is used with this type stimulation?

High-voltage pulsed monophasic generators deliver current to deep tissues without damaging superficial tissues and are used for pain modulation. What type of waveform is used with this type stimulation?

• A. Monophasic spike delivered in pairs
• B. Biphasic symmetric
• C. Pulse trains with alternating polarity
• D. Continuous direct current

Answer: (A)

High-voltage pulsed current therapy uses a unidirectional, monophasic waveform. The pulses are very short and of high amplitude, and they are delivered in paired spikes (twin pulses) to create a brief, high-intensity event that can reach deeper tissues while keeping the average current low. This combination minimizes superficial tissue irritation and polarization, making it suitable for pain modulation and tissue effects. The other waveform styles—biphasic symmetric, pulse trains with alternating polarity, or continuous direct current—either switch polarity, rely on longer or continuous currents, or risk greater superficial heating and polarization, which is not how HVPC is intended to work.

High-voltage pulsed current therapy uses a unidirectional, monophasic waveform. The pulses are very short and of high amplitude, and they are delivered in paired spikes (twin pulses) to create a brief, high-intensity event that can reach deeper tissues while keeping the average current low. This combination minimizes superficial tissue irritation and polarization, making it suitable for pain modulation and tissue effects. The other waveform styles—biphasic symmetric, pulse trains with alternating polarity, or continuous direct current—either switch polarity, rely on longer or continuous currents, or risk greater superficial heating and polarization, which is not how HVPC is intended to work.