Fig. 2.

Reduction of the “diagnostic gap” in critical congenital heart disease (cCHD) with pulse oximetry screening. All newborns with critical cCHD (n = 90 out of the study population (n = 48,348)) are shown. Colours indicate in percentages whether the diagnosis was made by prenatal ultrasound (prenatal), by physical examination or clinical observation (clinical) before pulse oximetry screening, i.e. during the first 24 h of life or by pulse oximetry screening (POS). When POS was used, only 4.4% of newborns had a delayed diagnosis of cCHD (diagnostic gap)