One approach could be at minimum, random sampling of 3-4 babies on supplemental oxygen on different shifts during one week each month. Nursing shifts range from 6 up to 12 hours across the world and nurse to patient ratios are also variable. For this reason, the data collection method should be tailored by hospital, and by unit.

Mortality (will be calculated by the Patient Safety Movement Foundation): 

Prenatal detection of CCHD has been shown to improve surgical outcome reducing neonatal morbidity and mortality,8-10 supporting findings of neonatal studies that early detection has impact on the clinical results and morbidity and mortality rates. The Patient Safety Movement Foundation will use the mortality rates associated with the findings published in 2013 by Oster et al.22 The Oster study found that the one-year survival of newborns screened by pulse oximetry after 24 hours of age was 82.5%. Based on these data the mortality rate of 17.5% will be used.