Figure 4.
Noninvasive adjuncts used to measure CO2 levels during overnight polysomnograms. (a) Transcutaneous CO2 probe, which is applied to the skin; (b) nasal cannulae, which is inserted in the nares to measure end-tidal CO2 levels.
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.