A Model Analysis of Arterial Oxygen Desaturation during Apnea in Preterm Infants
Figure 2
Pulmonary gas exchange during apnea.
(A) Rate of pulmonary O2/CO2 exchange. and
fall from resting levels during apnea. (B) Net alveolar-capillary gas uptake (
) and respiratory exchange ratio (
)during apnea. (C) Changes in alveolar, arterial and mixed venous
during apnea. Contrast the time-course in
and
as they fall/rise towards
. (*) represents the fall in
if
was assumed equal to
. S1 = stage 1; S2 = stage 2.