Participant

sex

age

APACHE II score

respiratory management

Reason for starting NPPV/NHF

Treatment

Data Collection with PSG

Semi-structured interview

Interview time

A

man

50 s

24

NPPV

(mouth mask)

pulmonary edema

medical

NPPV and NHF first day night

9 days after NPPV withdrawal

28 minutes

B

man

70 s

24

NHF

acute pneumonia

medical

8 days after NHV withdrawal

26 minutes