A new compact ultrasound-delivering device helps alleviate osteoarthritis of the knee. An osteoarthritic knee has damaged joint surfaces, inflamation and swelling. This creates a stagnant environment. Just like a saturated sponge will not accept more water, the osteoarthritic joint is slow to soak up nutrients. However, ultrasound delivered at a low volume for a long time through a newly designed compact transducer agitates remaining cartilage and tissues. The ultrasound penetrates the joint and tissues. It stimulates the joint thermally and mechanically and improves permeability, creating a dynamic environment conducive to healing. Similar to a sponge that has been wrung out, the treated knee is now able to absorb nutrients. The waste is removed and swelling subsides. For more information, see the NSF news release.

Credit: Zina Deretsky, National Science Foundation