Assessing Modeled CO₂ Retention and Rebreathing of a Facemask Designed for Efficient Delivery of Aerosols to Infants

Figure 3

CO₂ concentrations predicted by one-dimensional model. (a) The % CO₂ concentrations averaged within the total volume of the mask were modeled over the first three breathing cycles (simulated breaths). (b) The % CO₂ concentrations were modeled over the first 50 breathing cycles (simulated breaths) to show that steady state is reached early. Both (a) and (b) were modeled using the “normal” infant respiratory pattern (60 breathing cycles/min).

(a)

(b)