What term describes adjusting the time between pulses to aid skin cooling?

• A. Variable Pulse Duration
• B. Variable Interpulse Delay
• C. Thermal Relaxation Time (TRT)
• D. Electromagnetic Spectrum

Answer: (B)

Timing between pulses to allow cooling is governed by the interpulse delay. When you adjust how long you wait between consecutive pulses, you’re using a Variable Interpulse Delay to give the skin time to shed heat. Extending this interval reduces heat buildup and lowers the risk of damage, making treatments safer while still delivering effective pulses. This differs from changing the duration of each pulse, which alters energy per pulse rather than the cooling interval, and from the tissue concept of Thermal Relaxation Time, which is about how long tissue takes to cool, not the adjustable setting itself. The electromagnetic spectrum is not relevant to this mechanism.