Millions living with diabetic neuropathic pain—a burning, tingling sensation caused by damaged nerves—may soon have a drug-free alternative. Scientists have engineered a wearable, spiral-shaped ultrasound patch that delivers focused, non-invasive ultrasound waves to peripheral nerves, thereby reducing pain without the need for medication.
The patch, made from flexible, skin-conforming materials, utilizes spiral piezoelectric transducers to focus ultrasound energy deep into the tissue and stimulate the vagus and sciatic nerves, effectively modulating pain signals.
Key Features of the Ultrasound Patch
- Spiral design for improved energy focusing and depth penetration
- Conformal, wearable skin-like material for daily use
- Stimulates specific peripheral nerves (e.g., sciatic nerve)
- Drug-free and non-invasive neuromodulation
- Operates at 1.5 MHz with sub-centimeter precision
- Demonstrated pain relief in rodent models of diabetic neuropathy
Science Behind It
The patch contains 24 spiral-shaped transducer elements that deliver pulsed ultrasound to peripheral nerves. When applied over the skin:
- Ultrasound penetrates muscle and fat tissue
- Nerves are modulated at safe and effective intensities
- Result: Reduced inflammation, lower pain markers, and improved nerve function
Results from Preclinical Studies
- Animals with induced diabetic neuropathy showed a significant reduction in pain sensitivity after treatment.
- No visible tissue damage, inflammation, or systemic side effects were observed.
- Pain suppression persisted for up to 7 days with repeated stimulation.
Real-World Impact
This innovation paves the way for:
- Alternative to opioids and painkillers
- Personalized, wearable neuromodulation devices
- Clinical translation for chronic pain, fibromyalgia, and arthritis
- Future exploration into brain or spinal cord stimulation using similar tech
Reference
Pu, C., Fu, B., Lu, P., Guan, X., Zhang, J., Shen, Y., … & Peng, C. (2025). A wearable spiral ultrasound patch for focused ultrasound peripheral neuromodulation of diabetic neuropathic pain. Cell Reports Physical Science. DOI: 10.1016/j.xcrp.2025.102684
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