Having suffered from SEPSIS this been lot of chat ABOUT if you can pic up septic event with SPO2 meter .. Of curse I would say you can IF your PI Perfusion to Oximeter was within perimeters then all of a sudden dropped and you started feeling unwell.
Anyway it's bit more complex with lot of fancy names BUT ITs a new feature more understandable one on pulse oximeter BIT better than a plethysmograph (or 'Pleth' for short) wave form you see on some you might buy.
I for one welcome any new perimeters we can manage gauge our condition with that keeps us out of AE