Objective:

To describe the pre and post ductal saturation performed by the cardiac screen recommended by the American Academy of Pediatrics (AAP) of all newborns admitted to the physiological nursery, at a height of 2,640 meters above sea level (Mexico City).

Material and methods:

A cross-sectional study conducted during the period from March to August of 2018, all the sieves were performed after 24 hours of life, we use the algorithm recommended by the AAP. Oximetry was taken at two sites: right hand (preductal) and any of the feet (postductal). We included 292 newborns (RN), of which 256 were term RN, and 36 late preterm RN.

Results:

Mean preductal saturation was 95.5% (95% CI 95.2-95.8) and 95.8% postductal (95% CI 95.5-96.1).

Conclusions:

Values were established for newborns at the height of the City of Mexico, with which we can suggest the application of a safe cardiac sieve with the guidelines of the AAP in our environment.