Is ultrasound recommended for acute injuries?

Is ultrasound recommended for acute injuries?

• A. Yes must be pulsed
• B. Yes may be continuous
• C. No, not used
• D. Only if warmed up

Answer: (A)

In acute injuries, ultrasound is used in a pulsed, non-thermal mode to support healing without adding heat. The pulsed delivery creates mechanical effects—like microstreaming and cavitation—that can stimulate cell membranes, increase fibroblast activity, and promote tissue repair, while keeping temperature rise minimal. Continuous ultrasound, by contrast, raises tissue temperature and can worsen acute inflammation, so it isn’t the preferred approach in the initial phase. Using a pulsed duty cycle (for example around 20%), with a frequency appropriate for tissue depth (1 MHz for deeper tissue, 3 MHz for superficial), and a low to moderate intensity for several minutes, aligns with this goal. The option describing warmth or only using continuous heating isn’t consistent with how ultrasound is best applied acutely.

In acute injuries, ultrasound is used in a pulsed, non-thermal mode to support healing without adding heat. The pulsed delivery creates mechanical effects—like microstreaming and cavitation—that can stimulate cell membranes, increase fibroblast activity, and promote tissue repair, while keeping temperature rise minimal. Continuous ultrasound, by contrast, raises tissue temperature and can worsen acute inflammation, so it isn’t the preferred approach in the initial phase. Using a pulsed duty cycle (for example around 20%), with a frequency appropriate for tissue depth (1 MHz for deeper tissue, 3 MHz for superficial), and a low to moderate intensity for several minutes, aligns with this goal. The option describing warmth or only using continuous heating isn’t consistent with how ultrasound is best applied acutely.