Name two common wound-healing modalities that use electrical current.

• A. HVPC and pulsed electrical stimulation
• B. HVPC and iontophoresis
• C. Pulsed electrical stimulation and iontophoresis
• D. Continuous DC therapy

Answer: (A)

Electrical current can accelerate wound healing by shaping the wound environment—enhancing blood flow and lymphatic drainage, guiding cell movement, and boosting cellular activity involved in repair.

One common approach is high-voltage pulsed current. It delivers brief, high-voltage pulses to the wound, typically as a monophasic waveform with a short pulse duration. This pattern helps reduce edema and improve microcirculation, while also supporting the activities of inflammatory and regenerative cells to promote granulation and epithelialization. In practice, clinicians often use polarity strategies that align with the wound’s healing stage, using negative polarity during inflammatory phases and adjusting as healing progresses.

Another widely used modality is pulsed electrical stimulation, often referred to as microcurrent therapy. This delivers low-amplitude pulses and aims to boost cellular energy (ATP production) and metabolism, which promotes collagen synthesis, fibroblast activity, and epithelialization. Because it uses smaller currents and longer overall treatment times, it’s applicable across various wound types and stages.

These two approaches are foundational because they directly engage the biology of healing with electrical cues. Iontophoresis, while a method to drive medications into tissue with current, is not by itself a primary wound-healing modality, and continuous direct-current therapy is less commonly used today due to safety concerns and variable evidence.