I work at St Vincent Hospital in Leadville, CO (10,200 feet above sea level). We have many of the Uranium Miners come to us to have Arterial Blood Gases, PFTs, and x--rays. Our policy is the patient must be at Altitude at least 8 hours prior to any ABGs. The ABG is only affected by the PO2 which is 60 to 80 instead of 80 to 100 mmHg.
We don't have a pulmonologist in our hospital and our in-town family doctors don't write for these prescriptions. We get the prescriptions from the patient's own doctor. This has been going on for over 3 years at least.
Email me at amartinson@svghd.org if you have any other quesitons. Hopes it helps.
Amy Martinson CRT