A reading this low means you might need supplemental oxygen or that there may be challenges ... with prongs that go into your nostrils) or a face mask.

NASHVILLE, Tenn. (AP) — A lack of oxygen that incapacitated the pilot and three passengers is likely what caused a private ...

These included a missing pilot-side oxygen mask and supplemental oxygen levels at ... to the airplane occupants and passenger oxygen masks would not have deployed in the event of a loss of ...

They included no pilot-side oxygen mask and supplemental oxygen at its minimum ... to the airplane occupants and passenger oxygen masks would not have deployed in the event of a loss of ...