SpO2 readings matched the Masimo at every altitude, while the PulseOx
5500 yielded measurements that were consistently higher, by an average of two or three points.
One experienced Denver-based Cirrus instructor, who was familiar with the West Virginia accident, told me he adds checking his pulseox
to his habit of doing 15-minute checks of his position, fuel, instruments, and weather.
Tiny sensor pads are put on the hands and feet of babies, like little Isobel, to detect whether they have normal oxygen levels in their blood under the year-long PulseOx