Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Risk of desaturation during apnoea. Proportion of study participants in HFNO (purple line) and FM (blue line) groups with oxygen saturation >92% during apnoea. Hazard ratio comparing FM and HFNO groups, 0.27 (95% confidence interval, 0.11–0.65; log-rank P=0.007). TA, onset of apnoea. TA+x, apnoea duration where x denotes min after TA; FM, facemask oxygen; HFNO, high-flow nasal oxygen.
