What is the recommended intensity range for ultrasound during the acute stage?

In the acute stage of injury, the primary goal of using ultrasound therapy is to promote healing while minimizing any adverse effects. The recommended intensity range for ultrasound during this phase is lower, specifically between 0.5 to 1.0 W/cm². This intensity is effective for providing thermal effects and increasing tissue elasticity without causing excessive heat or discomfort, which could worsen inflammation or exacerbate the injury.

Using this lower intensity helps to enhance circulation and promote cellular responses conducive to healing. Higher intensities, such as those found in the other choices, could lead to tissue overheating, pain, or even damage, which is not suitable for the acute stage when the focus should be on reducing inflammation and facilitating healing rather than creating further tissue stress. Therefore, the choice of an intensity within the 0.5 to 1.0 W/cm² range is considered appropriate and beneficial for acute conditions.