Take ZetrOZ Systems’ sam® wearable products. Sam® Sport, for example, has a proprietary ultrasound technology using low intensity, long-duration ultrasound. It not only provides pain relief, but also speeds up the healing process for various tendon, ligament or muscle injuries, according to Chief Commercial Officer Jim Molinaro. To that end, there’s a small device that snaps into a bandage-like patch on the skin. Ultrasound wave pulses, he says, “wake up the human body,” building up collagen, which accelerates healing, increasing oxygen levels and blood flow. Sensors monitor the frequency of pulses, as well as temperature, to make sure the device doesn’t heat up too much. Approved by the Federal Drug Administration (FDA) in 2013, it’s available by prescription in the U.S. and over the counter in Europe, Canada and Asia.