The application of a surgical face mask over different oxygen delivery devices; a crossover study of measured end-tidal oxygen concentrations.

ABSTRACT:

Background

The application of a surgical face mask over oxygen delivery devices is now a widespread recommendation in the setting of the Coronavirus disease pandemic. This addition is designed to reduce droplet spread, but this also changes the nature of these devices, and may alter the amount of oxygen delivered to a patient. This research investigated how placing a surgical face mask over both a simple plastic mask ("Hudson mask") and nasal cannula altered the concentration of available oxygen measured at the nares.

Methods

We measured the inspired and end-tidal oxygen concentrations of five healthy non-smoking volunteers. Oxygen was delivered via nasal cannula and also a simple plastic face mask, at flow rates of 2, 4, 6 and 8 l per minute, with and without an overlying s

SUBMITTER: Brown-Beresford K 

PROVIDER: S-EPMC8899454 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature