High Altitude Simulation Test (HAST)
This test will be performed in the Pulmonary Function Lab (Module B6/2), at the University of Wisconsin Hospital and Clinics, 600 Highland Avenue. Please arrive 15 minutes prior to your appointment to allow time to complete the registration process.
Finding your way.
From the parking ramp you will enter through the main Hospital Entrance. Follow the brown pathway past the “D” elevator lobby to “Clinic Registration”. Upon completing registration you will be directed to the Pulmonary Function Lab “Check In” area.
What is a high altitude simulation test?
This is a test that has been ordered by your physician to determine how much additional oxygen, if any, you may need when flying or traveling to high altitudes. Someone with lung disease may have increased oxygen needs under such conditions.
For this test you will be in a reclined chair. A clear round hood will be placed over your head to rest on your shoulders for approximately 30 minutes. There will be a constant flow of oxygen delivered into the hood through a tube to represent the oxygen level one inspires during air travel. Your oxygen level will be monitored throughout the test by a small sensor placed on your finger. If your oxygen level decreases to a predetermined level a blood sample will be drawn to further evaluate the oxygen content in your blood. Once the blood is drawn extra oxygen will be given to you until your oxygen level is at an acceptable level.
How do I prepare for this test?
- No smoking or breathing in secondhand smoke before the test.
- No heavy exercise before the test.
- Remove any finger nail polish.
How will I feel after the test?
After the test you will be able to eat, drink, and keep your normal routine.
If you have any questions or concerns before the test, please call:
UWHC Pulmonary Function Lab: (608) 263-7000, Monday-Friday 8:00am-4:30pm.
Toll free 1-800-323-8942; ask for the Pulmonary Function Lab.
The information provided should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Any duplication or distribution of the information contained herein is strictly prohibited.
Last Updated: 07/16/2012
Copyright © 07/11/2012 University of Wisconsin Hospitals and Clinics Authority. All rights reserved. Produced by the Department of Nursing. HF#6383
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