A physical therapist administers ultrasound over a patient's anterior thigh. After one minute of treatment, the patient reports a burning sensation under the soundhead. What is the MOST appropriate action?

The most appropriate action when a patient reports a burning sensation under the ultrasound soundhead is to temporarily discontinue treatment and examine the amount of coupling agent utilized. This sensation can indicate that the ultrasound waves are not being effectively transmitted through the skin and into the underlying tissues, often due to inadequate coupling.

Ultrasound therapy requires a coupling agent, frequently a gel, to facilitate the transfer of sound waves from the transducer to the skin. Insufficient coupling may result in the ultrasound energy reflecting off the skin instead of penetrating into the tissue, leading to localized heating and the uncomfortable burning sensation felt by the patient. By checking the coupling agent, the therapist can ensure that there is enough to facilitate proper transmission and avoid any adverse effects on the patient.

Addressing the issue promptly not only reassures the patient but also allows the therapist to adjust treatment parameters, such as the amount of coupling agent used or the intensity of the ultrasound, to prevent discomfort and deliver effective therapy. This proactive approach prioritizes patient safety and comfort during treatment.