Comparison of tissue oxygenation achieved breathing oxygen from a demand valve with four different mask configurations.

CONCLUSION: Of the commonly available O₂ masks for use with a demand valve, the IOM with NC achieved the highest PtcO₂ values. PtcO₂ and nasopharyngeal FIO₂ values were similar between the IOM with and without NC. Given the reported discomfort of the NC, the IOM without NC may be the best option. PMID: 30517952 [PubMed - in process]
Source: Diving and Hyperbaric Medicine - Category: Sports Medicine Tags: Diving Hyperb Med Source Type: research