Sustained Acoustic Medicine (SAM) delivery details: which statement is true?

• A. A high-intensity surgical device
• B. A handheld wand applied to skin
• C. An implanted reservoir
• D. A wearable device that delivers drug-free pain therapy

Answer: (D)

Sustained Acoustic Medicine uses low-intensity, long-duration therapeutic ultrasound delivered through a wearable device that sits on the skin. The key idea is noninvasive, external therapy that provides ongoing, drug-free pain relief by delivering energy over hours of use, often for several weeks of treatment. This wearable design enables continuous treatment without needing surgery, injections, or implanted hardware.

The other descriptions don’t fit because SAM isn’t a high-intensity surgical device, nor does it require an implanted reservoir. It also isn’t simply a handheld wand used briefly; the wearable form is chosen to allow prolonged, targeted therapy in a convenient, home-friendly way.