Here is a story from Medgadget about a device that helps people perform perfect chest compressions when performing CPR.

We are seeing sensors being incorporated into many devices. Mostly they’re being used to monitor various processes and collect data for later analysis and feedback. The Physio-Control device suggests ways that sensors in devices can give immediate feedback and serve in a teaching/coaching manner. As it relates to medical product development, I can see this type of sensor and realtime feeback configuration being extremely useful for therapeutic and physical rehabilitation devices. Combined with the research being done on the brain, a sensor-feedback loop could be incorporated into a device that helps stroke victims and those with brain injuries to regain function.