Ultrasound therapy is used for tissue heating and healing; which is a contraindication?

• A. Pacemakers
• B. Open wounds
• C. Areas with active infection
• D. Areas of metal implants

Answer: (A)

The key safety issue with ultrasound therapy is the presence of implanted electronic devices in the treatment area. Pacemakers are particularly vulnerable because the acoustic energy and any nearby electrical/interference could affect the device’s function or cause heating near the leads, posing a risk to the patient. That’s why having a pacemaker in the area is considered a contraindication.

Open wounds, areas with active infection, and areas with metal implants are not absolute contraindications in every case. Open wounds and infections may be treated with ultrasound under careful guidelines and with consideration of the infection status and wound care. Metal implants require caution because energy can reflect or concentrate near metal, but it isn’t automatically disqualifying; adjustments in technique, intensity, and duration are often used based on the specific situation. The strict safety boundary, however, is the implanted electronic device like a pacemaker.