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Review about: Wellue
wrist oxygen monitor
I had low spo2 average not apnea and did start to use an oral appliance made by a dentist.
I follow my spo2 with wellue wrist monitor.
It provides very good set of important measurements as: average spo2, time less than 90%, number of 4% drops (my understading pretty same as OD-index in the sleep study), minimum spo2 and draws graphs of the whole night of spo2 and pulse rate. Every night has a numericl rating of the sleep.
A very carefully planned set of things important about spo2 also for apnea patients, I think.
Could be even useful for CPAP users to track how things are going.