Precautions should be in place for decreased sensation especially with __________ US

• A. Thermal
• B. Non-thermal
• C. Pulsed
• D. Continuous

Answer: (A)

Thermal ultrasound raises tissue temperature, and when a patient has decreased sensation they may not feel onset of overheating. That hidden heat can lead to burns or tissue damage if precautions aren’t taken. So, in cases of reduced sensation, special safety measures are essential for thermal ultrasound—lower the intensity or duration, use a lower duty cycle or switch to non-thermal/pulsed modes when appropriate, and routinely check the skin for signs of heating. This is why the option describing thermal ultrasound is the best fit here.