There are air evac businesses who exist wherever they may be in the United States. As these individuals have need of a basic life support medical staff , and/or specialized surgery , medical air evacuation operations must be used. Those people need advanced cardiac life support while they travel. Sometimes there are citizens who have a medical necessity to be transported or are wherever they may be in the United States, so these men or women obtain help from medical air evacuation establishments. The patients frequently will look around for medical flight businesses with a hospital case worker.