Design of oxygen-sparing nasal reservoir cannula (OSNRC) based on oxygen sparing and CO2 retention Posted by Dietrich von Diemar on February 3, 2021 12:24 am | Leave a Comment Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Save my name, email, and website in this browser for the next time I comment. Δ