What frequency range is commonly cited for continuous ultrasound in wound healing?

What frequency range is commonly cited for continuous ultrasound in wound healing?

• A. 1-1.5 MHz
• B. 3-5 MHz
• C. 0.5-0.75 MHz
• D. 2-3 MHz

Answer: (A)

Understanding how ultrasound works in healing tissues starts with how frequency affects depth of penetration. Lower frequencies travel deeper into tissue, while higher frequencies are absorbed more quickly in superficial layers. For wound healing, you want energy delivered to the wound bed and the surrounding tissue without overheating the surface, so a frequency around 1 MHz is typically used. This range, about 1 to 1.5 MHz, provides enough penetration to reach the wound bed while still allowing effective energy delivery for the desired therapeutic effects, such as improved blood flow, collagen turnover, and cellular activity, when the intensity and treatment duration are appropriate. Higher frequencies (like 3–5 MHz) heat only the superficial skin layers and may not reach deeper wound tissue effectively, while lower frequencies (0.5–0.75 MHz) penetrate deeper but are less commonly cited for standard wound healing protocols. Frequencies in the 2–3 MHz range are more superficial than the 1 MHz range and aren’t the typical choice for this application. So, the commonly cited range for continuous ultrasound in wound healing is around 1 to 1.5 MHz.

Understanding how ultrasound works in healing tissues starts with how frequency affects depth of penetration. Lower frequencies travel deeper into tissue, while higher frequencies are absorbed more quickly in superficial layers. For wound healing, you want energy delivered to the wound bed and the surrounding tissue without overheating the surface, so a frequency around 1 MHz is typically used. This range, about 1 to 1.5 MHz, provides enough penetration to reach the wound bed while still allowing effective energy delivery for the desired therapeutic effects, such as improved blood flow, collagen turnover, and cellular activity, when the intensity and treatment duration are appropriate. Higher frequencies (like 3–5 MHz) heat only the superficial skin layers and may not reach deeper wound tissue effectively, while lower frequencies (0.5–0.75 MHz) penetrate deeper but are less commonly cited for standard wound healing protocols. Frequencies in the 2–3 MHz range are more superficial than the 1 MHz range and aren’t the typical choice for this application. So, the commonly cited range for continuous ultrasound in wound healing is around 1 to 1.5 MHz.