Phonophoresis safety concerns include which issue?

• A. Risk of periosteal burning
• B. Large-area treatment capability
• C. Immediate results after one session
• D. Systemic toxicity

Answer: (C)

Phonophoresis safety concerns center on tissue heating and drug absorption. Ultrasound energy near bone can raise the temperature of the periosteum, leading to periosteal burns if the intensity is too high, the exposure time is too long, coupling isn’t ideal, or there’s excessive energy transfer. Because of this, clinicians use the lowest effective intensity and duration, ensure proper gel coupling, and monitor the patient for signs of excessive warmth, redness, or discomfort.

Another safety consideration is systemic toxicity from absorbed medication. Even though the drug is applied topically, ultrasound can enhance transdermal delivery enough to produce systemic effects, especially with potent drugs or improper dosing. This requires selecting appropriate medications, doses, and patient factors (like liver or kidney function), and watching for systemic adverse effects.

Immediate results after one session aren’t a safety concern; they’re an accuracy or expectations issue and aren’t linked to adverse events. Likewise, large-area treatment capability is a practical feature, not a safety issue.