Which of the following is NOT a LIPUS parameter?

Which of the following is NOT a LIPUS parameter?

• A. intensity <0.1 W/cm2
• B. 20% duty cycle
• C. 20 minutes daily
• D. frequency 2 MHz

Answer: (D)

Low-intensity pulsed ultrasound settings are defined by how much energy is delivered, how that energy is pulsed, how long each session lasts, and the frequency used to generate the waves. For LIPUS, the energy is low to avoid heating, it’s delivered in short bursts (a low duty cycle), sessions are typically around 20 minutes each day, and the frequency is chosen to suit the typical depth of the target tissue. The intensity being less than 0.1 W/cm2 fits the low-energy approach used in LIPUS. A 20% duty cycle means the ultrasound is on only a portion of the time, which maintains low average energy and reduces heating while still delivering the therapeutic effect. A 20-minute daily duration aligns with common treatment guidelines to provide sufficient cumulative energy over time for bone healing. Frequency, however, is not aligned with standard LIPUS practice when set to 2 MHz. LIPUS devices commonly use about 1.5 MHz (with some variation around that value), chosen to penetrate to the bone tissue adequately without excessive attenuation. Using 2 MHz is not a typical or recommended LIPUS parameter, so that option is not a standard setting for this therapy.

Low-intensity pulsed ultrasound settings are defined by how much energy is delivered, how that energy is pulsed, how long each session lasts, and the frequency used to generate the waves. For LIPUS, the energy is low to avoid heating, it’s delivered in short bursts (a low duty cycle), sessions are typically around 20 minutes each day, and the frequency is chosen to suit the typical depth of the target tissue.

The intensity being less than 0.1 W/cm2 fits the low-energy approach used in LIPUS. A 20% duty cycle means the ultrasound is on only a portion of the time, which maintains low average energy and reduces heating while still delivering the therapeutic effect. A 20-minute daily duration aligns with common treatment guidelines to provide sufficient cumulative energy over time for bone healing.

Frequency, however, is not aligned with standard LIPUS practice when set to 2 MHz. LIPUS devices commonly use about 1.5 MHz (with some variation around that value), chosen to penetrate to the bone tissue adequately without excessive attenuation. Using 2 MHz is not a typical or recommended LIPUS parameter, so that option is not a standard setting for this therapy.