Which precaution is specifically associated with US treatment?

• A. Bony prominences may develop hot spots
• B. Always treat over metal implants
• C. Ignore any sensation changes during treatment
• D. Use maximal intensity on sensitive areas

Answer: (A)

Ultrasound treatment carries a heating effect, and bone absorbs ultrasound energy more readily than soft tissues. When a bony prominence is close to the transducer, there’s little soft tissue to buffer the energy, so localized heating can occur, creating hot spots that may lead to burns. That’s why a precaution specific to US is to avoid or carefully monitor treatment over bony prominences to prevent overheating.

Since metal implants can reflect energy and still pose risk, and because patient sensation should guide treatment, those options are not the safest universal precautions. Likewise, never treat sensitive areas at maximal intensity and always pay attention to any changes in sensation or discomfort during treatment.