Continuous ultrasound is associated with thermal effects.

Continuous ultrasound is associated with thermal effects.

• A. True
• B. False
• C. Not applicable
• D. Sometimes

Answer: (A)

Continuous ultrasound delivers energy without interruption, so the duty cycle is effectively 100%. That continuous energy input heats the tissue, producing thermal effects. The resulting heat can raise tissue temperature, increase blood flow and metabolism, improve collagen extensibility, and alter nerve conduction—all parts of the thermal response. Pulsed ultrasound, by contrast, pauses energy delivery, reducing heating and favoring non-thermal mechanical effects like cavitation and acoustic streaming. So the statement that continuous ultrasound is associated with thermal effects is correct.

Continuous ultrasound delivers energy without interruption, so the duty cycle is effectively 100%. That continuous energy input heats the tissue, producing thermal effects. The resulting heat can raise tissue temperature, increase blood flow and metabolism, improve collagen extensibility, and alter nerve conduction—all parts of the thermal response. Pulsed ultrasound, by contrast, pauses energy delivery, reducing heating and favoring non-thermal mechanical effects like cavitation and acoustic streaming. So the statement that continuous ultrasound is associated with thermal effects is correct.