Stanford researchers have developed a new strategy for designing, making and collecting data from a passive (non-powered), flexible pressure sensor for intra-cranial pressure (ICP) monitoring at the optimal Ghz frequencies for wireless transmission in biological tissues. This approach allows the smallest size scaling of the sensors to 1mm by 1mm and 0.1mm in thickness, with a pressure resolution of 2 mmHg and a range up to 100 mmHg. It is also applicable to other bio-pressure monitoring, such as intra-ocular, cardiovascular or urinary systems.
Stage of Research
NPR "All Tech Considered" Feature
"Just Like Human Skin, This Plastic Sheet Can Sense And Heal", April 11, 2016
- Intra-cranial pressure monitoring
- Bladder pressure monitoring
- Intra-ocular pressure monitoring
- Low cost
- Easy to use
- Simple design and fabrication
- Mechanically flexible
- Passive, non-powered
- Very small form factor, 1x1x0.1 with volume of 0.1mm3
- Can detect signals in fluid (under several mm of saline)
- L. Y. Chen, B. C.-K. Tee, A. L. Chortos, G. Schwartz, V. Tse, D. J. Lipomi, H.-S. P. Wong, M. V. McConnell, Z. Bao, "Continuous wireless pressure monitoring and mapping with ultra-small passive sensors for health monitoring and critical care," Nature Comm., 5, Article number: 5028, 2014.
- Abate, Tom. "Stanford team invents sensor that uses radio waves to detect subtle changes in pressure," Stanford Engineering News & Updates (Oct. 10, 2014).