High Altitude Simulation Testing Make an Appointment Patient Education Find a Doctor Download Patient Education Your doctor has suggested you have a High Altitude Simulation Test as part of the evaluation at National Jewish Health. A High Altitude Simulation Test (HAST) is a test to determine if you need supplemental oxygen when you fly on an airplane or go to a higher altitude. Download PDF: High Altitude Simulation Testing Download PDF: High Altitude Simulation Testing View more information on High Altitude Simulation Testing National Jewish Health authors free downloadable patient education materials to provide you and your family the information and tools to help manage your disease. They include Understanding Booklets, Med Facts, Test Facts, Medication handouts and more. Search Free Education Materials