Huizing MJ, et al. – The validity and reliability of smartphone–paired pulse oximeter (Masimo iSpO2–Rx) were compared with a hospital–grade pulse oximeter (Masimo Radical–7) in the screening of critical congenital heart defects (CCHD). Investigations approved that CCHD screening with the Masimo iSpO2–Rx was feasible and accurate. Moreover, the use of reliable smartphone–paired pulse oximeters might contribute to the extension of CCHD screening to home births and low resource settings.

Methods

• By 2 independent teams, one using the Radical-7 and the other using the iSpO₂-Rx, preductal (right hand) and postductal (either foot) saturations were analyzed in a population of 201 term newborns.
• Bland-Altman analysis was used to calculate mean bias and 95% limits of agreement between the 2 pulse oximeters.

Results

• Investigations revealed that for the preductal oxygen saturation, the mean bias (Radical-7 minus iSpO₂-Rx) was -0.08 (SD 1.76) and the lower and upper limits of agreement were -3.52 and 3.36, respectively.
• For the postductal oxygen saturation, the mean bias was -0.11 (SD 1.68) and the lower and upper limits of agreement were -3.49 and 3.18, respectively.
• Moreover, the iSpO₂-Rx provided reliable measurements of saturations below 95% in a group of 12 infants admitted to the neonatal intensive care unit.