Med flight businesses are looked up by the patients sons or daughters with the yellow pages. As these patients are specified as being in need of a ICU when being outside the United States at ski resorts but they are in a medically self sustaining circumstance , air ambulance businesses have to be coordinated with. Those people are in need of advanced cardiac life support when these patients fly. There frequently are case patients who are helped by medevac services because they are handicapped while being outside the United States in cities around the country although these individuals are in a medically stable situation. There are air evacuation charters that are there to help patients in the United States.