The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government.
The purpose of this research study is to test a new medical device, called SONAS. The SONAS device is a portable, battery-powered ultrasound device to detect strokes in the prehospital environment, such as emergency vehicles (eg. ambulances, helicopters).