What are the two settings used for ultrasound therapy?

What are the two settings used for ultrasound therapy?

• A. Continuous and pulsed
• B. Amplitude and frequency
• C. Static and dynamic
• D. Thermal and nonthermal

Answer: (A)

The main idea is that therapeutic ultrasound is applied in two primary modes that control how energy is delivered over time. In continuous mode the energy flows without interruption for the entire treatment, which builds heating in the tissue and produces thermal effects such as increased blood flow, greater tissue extensibility, and pain relief from warmth. This mode is chosen when warming the tissue to improve stretch or reduce stiffness is the goal. In pulsed mode the energy is delivered in bursts with off periods in between, so the average energy is lower and heating is minimized. The non-thermal mechanical effects—like cavitation and microstreaming—come into play here and can aid tissue healing, reduce edema, and enhance cellular processes without significant temperature rise. This mode is often preferred for acute injuries or when overheating must be avoided. So the two settings represent how ultrasound energy is timed and delivered: continuous for thermal effects, pulsed for non-thermal or low-thermal effects.

The main idea is that therapeutic ultrasound is applied in two primary modes that control how energy is delivered over time. In continuous mode the energy flows without interruption for the entire treatment, which builds heating in the tissue and produces thermal effects such as increased blood flow, greater tissue extensibility, and pain relief from warmth. This mode is chosen when warming the tissue to improve stretch or reduce stiffness is the goal.

In pulsed mode the energy is delivered in bursts with off periods in between, so the average energy is lower and heating is minimized. The non-thermal mechanical effects—like cavitation and microstreaming—come into play here and can aid tissue healing, reduce edema, and enhance cellular processes without significant temperature rise. This mode is often preferred for acute injuries or when overheating must be avoided.

So the two settings represent how ultrasound energy is timed and delivered: continuous for thermal effects, pulsed for non-thermal or low-thermal effects.