High Altitude Simulation Test (HAST)
Test date______________________ Test time______________________
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
Finding your way.
From vale or 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
For this test you will be in a reclined chair. A nasal canula will be placed in your
nose, 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 air 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 small
sample of blood sample may be drawn to further evaluate the oxygen level in your
blood. Once the blood is drawn extra oxygen may be given to you until your
oxygen level is at an acceptable level.
How do I prepare for this test?
ξ No smoking or breathing in secondhand smoke before the test.
ξ No heavy exercise before the test.
ξ 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-
Toll free 1-800-323-8942; ask for the Pulmonary Function Lab.
Your health care team may have given you this information as part of your care. If so, please use it and call if you
have any questions. If this information was not given to you as part of your care, please check with your doctor. This
is not medical advice. This is not to be used for diagnosis or treatment of any medical condition. Because each
person’s health needs are different, you should talk with your doctor or others on your health care team when using
this information. If you have an emergency, please call 911. Copyright ©3/2015. University of Wisconsin Hospitals
and Clinics Authority. All rights reserved. Produced by the Department of Nursing. HF#6383.