What safety concern is critical when using shortwave diathermy?

• A. Avoid metal on or near the treatment area and monitor for overheating; ensure proper shielding and avoid use over the reproductive organs.
• B. Use metal near the area to improve conduction.
• C. Always apply over metallic implants for grounding.
• D. No shielding is necessary.

Answer: (A)

Shortwave diathermy fires radiofrequency energy that heats tissues, so safety hinges on preventing unintended heating outside the target area. Metal objects in or near the treatment field can act as antennas, heating up quickly and causing burns, and they can distort the electromagnetic field, leading to uneven or excessive heating. That’s why avoiding metal on or near the treatment area is essential, and why proper shielding is needed to contain the energy and protect surrounding tissues. Monitoring for overheating during the session helps catch any excessive tissue heating early. In addition, avoid applying the therapy over reproductive organs because the gonads are particularly sensitive to heating and exposure could affect fertility. The other ideas—placing metal near the area to improve conduction, grounding over metallic implants, or skipping shielding—are unsafe because they increase the risk of burns, unintended heating, or tissue damage.