For edema reduction with HVPS, which combination is described?

• A. Positive polarity rate 60-64
• B. Negative polarity rate 60-64
• C. Negative polarity rate 30-50
• D. Positive polarity rate 30-50

Answer: (C)

Edema reduction with high-voltage pulsed current relies on selecting the right electrode polarity and a comfortable, effective pulse rate. Using the negative polarity (cathode) over the edematous area helps promote fluid movement out of the interstitial space and supports improved superficial circulation and lymphatic drainage, which are key to reducing swelling. The rate in the 30-50 pulses per second range provides a smooth, non-fatiguing stimulus that engages the body's natural fluid-pumping mechanisms without causing noticeable muscle contraction or discomfort. Higher rates, like 60-64 pps, can be more uncomfortable or less specifically effective for edema control, and switching polarity to positive over the swelling area tends to be less effective for edema reduction. So, the described approach—negative polarity with a moderate rate of 30-50 pps—best aligns with edema reduction goals.