When using a lower intensity, you should do what?

When using a lower intensity, you should do what?

• A. Increase the amount of time
• B. Increase frequency
• C. Decrease treatment area
• D. Use higher duty cycle

Answer: (A)

Lowering the intensity reduces energy delivered per unit time, so you lengthen the treatment to deliver the same total energy to the target tissue. The total dose depends on intensity times time (and duty cycle for pulsed modalities), so extending duration compensates for the reduced intensity. Increasing frequency would change how the energy interacts with tissue rather than compensate dose. Decreasing the treatment area lowers the total energy delivered, which isn’t the goal if you want to maintain the same dose. Using a higher duty cycle would increase energy delivery per unit time, defeating the purpose of lowering intensity.

Lowering the intensity reduces energy delivered per unit time, so you lengthen the treatment to deliver the same total energy to the target tissue. The total dose depends on intensity times time (and duty cycle for pulsed modalities), so extending duration compensates for the reduced intensity. Increasing frequency would change how the energy interacts with tissue rather than compensate dose. Decreasing the treatment area lowers the total energy delivered, which isn’t the goal if you want to maintain the same dose. Using a higher duty cycle would increase energy delivery per unit time, defeating the purpose of lowering intensity.