In the LaMW: Ox Kills podcast, I discussed preoxygenation strategies. Sam Ghali had some questions; this wee has the answers.

Groombridge et al.

NRB @ 15 lpm  = 52.6%

NRB @ 15 lpm + NC @ 5 lpm = 57.1%

Max with anesthesia circuit

Hayes-Bradley et al.

http://www.annemergmed.com/article/S0196-0644(15)01500-0/abstract

Here are their numbers (they also simulated air leaks in this study)

NRB @ 15 lpm alone = 52% ETO2

NRB @ 15 lpm + NC @ 10 lpm = 67%

BVM = 79%

BVM with Mask Leak: BVM markedly improved with NC

Russell_et_al.

Nasal cannula improved ETO2 when mask leak was created