BEFA Flying Study Club

This is an opportunity for aviators to learn as well as to share their flying experiences.

• The host is Fred Quarnstrom, and each monthly topic is unique.

• A topic is presented once a month on the third Saturday at 10 – 11:45 am via Zoom meeting.

• After the presentation, there will be an interactive discussion.

Everyone is welcome to join the Zoom meeting, including nonmembers!




Saturday, February 20th at 10 AM
Supplemental Oxygen Use
presented by Fred Quarnstrom
  • Can symptoms tell me I am hypoxic?
  • Can I become hypoxic below 12,500’ and for less than 30 minutes?
  • Does hypoxia affect us all at the same altitude?
  • Can I carry an oxygen system to the planes I fly for under $140?
  • Do I need a pulse oximeter in my flight bag?
  • Maybe! YES! NO! YES! YES!
  • What is the difference between carbon monoxide (CO) and carbon dioxide (CO2)?

We will discuss how we get oxygen from the air to our brains, eyes, muscles, nerves – our whole body. We will also talk about the influence of carbon dioxide in breathing. Carbon monoxide can be deadly. How does breathing CO affect us?  What is the effect of altitude on breathing?

The FAA requires we use oxygen if we have been above 12,500’ for 30 minutes or above 14,000.  Some people should use supplemental oxygen much earlier and lower.  How can you tell you need O2?  Do you need a pulse oximeter? 


Fred Quarnstrom, DDS, CFI-I is a retired dentist anesthesiologist.  He taught dentists about respiratory physiology for 45 years and has some studies using a pulse oximeter at latitudes up to 16,000’.


Join Zoom Meeting:

Meeting ID:   574 735 9443                                    Passcode:       818922

Receive FAASTeam  - WINGS credit.  To register, click on  the following FAA link: