Injury response process and ultrasound: effects depend on which factors?

Injury response process and ultrasound: effects depend on which factors?

• A. Mode and frequency
• B. Tissue color
• C. Patient mood
• D. Room temperature

Answer: (A)

Ultrasound therapy effects are determined by how the energy is delivered and how deep it goes into the tissue. The mode describes whether the energy is continuous or pulsed. Continuous delivery keeps energy flowing and raises tissue temperature, producing thermal effects such as increased blood flow, tissue extensibility, and pain relief. Pulsed delivery turns energy on and off, lowering the average intensity and emphasizing non-thermal mechanical effects like cavitation and microstreaming that can aid healing without significant heating. The frequency controls how deep the energy penetrates: lower frequency (about 1 MHz) reaches deeper tissues, while higher frequency (about 3 MHz) stays more superficial. The combination of mode and frequency determines whether you get more heating, more mechanical effects, and how deep the treatment acts. Tissue color, patient mood, and room temperature don’t influence these physical interactions in the same way; color and mood aren’t parameters that change energy delivery, and room temperature doesn’t alter the ultrasound’s depth or the heating/mechanical effects.

Ultrasound therapy effects are determined by how the energy is delivered and how deep it goes into the tissue. The mode describes whether the energy is continuous or pulsed. Continuous delivery keeps energy flowing and raises tissue temperature, producing thermal effects such as increased blood flow, tissue extensibility, and pain relief. Pulsed delivery turns energy on and off, lowering the average intensity and emphasizing non-thermal mechanical effects like cavitation and microstreaming that can aid healing without significant heating. The frequency controls how deep the energy penetrates: lower frequency (about 1 MHz) reaches deeper tissues, while higher frequency (about 3 MHz) stays more superficial. The combination of mode and frequency determines whether you get more heating, more mechanical effects, and how deep the treatment acts.

Tissue color, patient mood, and room temperature don’t influence these physical interactions in the same way; color and mood aren’t parameters that change energy delivery, and room temperature doesn’t alter the ultrasound’s depth or the heating/mechanical effects.