If I’m in the hospital and I need oxygen, Crank it up to 100%.
Seems to work for Sleepy Joe.
https://www.aljazeera.com/news/2023/6/28/white-house-says-biden-uses-cpap-machine-for-sleep-apnea
Only if you don’t like your lungs. Free radical injury and pulmonary fibrosis occurs at great than 60%
Except that prolonged 100% oxygen can dry out membranes severely.