CPC A61M 16/085 (2014.02) [A61B 5/0075 (2013.01); A61B 5/0205 (2013.01); A61B 5/0836 (2013.01); A61B 5/097 (2013.01); A61B 5/682 (2013.01); A61B 5/6838 (2013.01); A61B 5/7242 (2013.01); A61M 16/06 (2013.01); A61M 16/0666 (2013.01); A61M 16/0683 (2013.01); A61M 16/0833 (2014.02); G01N 33/497 (2013.01); A61B 5/02416 (2013.01); A61B 5/0816 (2013.01); A61B 5/082 (2013.01); A61B 5/6831 (2013.01); A61B 2562/0204 (2013.01); A61M 2202/0208 (2013.01); A61M 2202/0225 (2013.01); A61M 2230/432 (2013.01); G01F 1/00 (2013.01)] | 15 Claims |
1. An oxygen mask configured for CO2 sampling and oxygen delivery, the oxygen mask comprising:
an oxygen inlet;
a nasal breath-sampling element configured to reduce dilution of exhaled breath by oxygen delivered through the oxygen inlet, wherein the nasal breath-sampling element comprises a nasal trap, the nasal trap comprising:
a plurality of oxygen supply perforations disposed across the nasal trap and configured to allow the oxygen to enter the nasal trap; and
a trap wall shaped to isolate a nasal exhale area of a subject from the oxygen delivered to the oxygen mask, wherein the trap wall is configured to surround a nose of the subject; and
a breath sampling port configured to receive breath samples, sampled by the nasal breath-sampling element, wherein the breath sampling port is in fluid flow connection with the nasal trap.
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