Wellue O2 Pulse Oximeter with Smart Reminder | Blood Oxygen Saturation Monitor for SpO2 and Heart Rate Tracking Continuously, Bluetooth Finger Ring with Free APP &PC Report, Style 1

Matches hospital monitoring. Comfortable.
This is a mixed review. I gave it five stars because the original product was amazing and because it bothers me that people say it’s not accurate when they are using it wrong. You can’t use it while exercising. The directions tell you that excessive motion will cause it to stop recording, and it will flash at you instead. It can’t get a good connection when you are exercising. This is for sleeping and for daytime use when you are not exercising. I’ve worn one for 3 years now and it has saved my life. Doctors have been so impressed they have asked where they can get it to order for relatives. It’s so accurate that in the hospital they just read my monitor instead of getting out their own. I’ve worn it on my left hand while wearing overnight oximetry from the sleep lab on my right, and it was completely accurate. When I go for checkups at the doctor, they use my monitor instead of getting out their own, because it has always been the same. I love the vibration feature. I have 2 monitors that I switch for night and day. Night is set at 90% and daytime at 94. That way if I drop below I will wake up and solve the problem at night, and during the day when it vibrates, I know I need to either adjust my oxygen or change my activity level. I can’t say enough good about it. I’m typing this while wearing it. It doesn’t interfere with anything. You just can’t get it wet. It’s so comfortable at night, I don’t even know it’s there. The display goes into sleep mode when you hold still to conserve battery, and just a flick of the wrist wakes it up to show you your O2 sats, pulse strength, and HR. I download them each morning and save to a pdf in my oxygen file, and can send anything unusual to my primary care doc, pulmonologist, and cardiologist. It’s amazing. However, the new model O2 Max has a different clasp than the older model, Wellue Sleepue, and it is hard to put on, and I am allergic to metal, so I can’t use the newest model. I am heartbroken. Why would they take a great thing and make it worse? 🙁

Did not match pulmonary office measurements
Overall, using this for several nights has told me what I needed to know about whether my CPAP is doing an adequate job of maintaining oxygenation. The exact accuracy of the reading cannot be confirmed, but at least I believe the size and frequency of the dips in oxygen saturation and the number of times a dip produces an arousal from sleep based on pulse changes or motion. I have the medical and engineering qualifications needed to interpret this. The silicone ring fit comfortably on my little finger (large bones) and the tightness was tolerable for one night on my ring finger. A true sleep study would be much more expensive and some fraction of that would be out of pocket. And there were delays and hassles in getting it scheduled. So I opted for this and am satisfied.Minor issues include the difficulty for an elderly person to fasten the wrist band – 2 short metal obelisks go through evenly spaced holes on the other band. Also, establishing the blue tooth connection each night is not a smooth process, often taking 2-3 minutes of hassles.Beware that the promised “free return” only applies to an unopened package.Update,After 6 weeks of use I remain satisfied. The ring stays comfortably all night on my little finger. The data seems trustworthy. Long battery life. The information display on my iPhone is good. I am able to spread the graph enough to see 2-5 second events. The interface is intuitive.Update #2, January 2024Decrease to 1 starDoes not match data obtained at pulmonology office.After using for a month and liking the interface for looking at sleep readings, I tried this while walking. It showed alarming drops, consistently, to 85% and even 79% during brisk walks. Over 20 such documented events while waiting for an appointment.That prompted a medical work up – Chest Xray, pulmonary function tests, and a six minute walk with saturation monitoring. During the supervised walk in the office (471 meters in 6 minutes), this device said oxygenation dropped to 85% and the maximum heart rate was 114. The hospital’s medical device never dropped below 96% saturation and reached a heart rate of 127. I have both an MD and a PhD in engineering, so this is perplexing and disturbing. I will purchase another brand of fingertip pulse oximeter (medical grade) and run (pun intended) more tests while walking. Physiology can be variable and needs repeatable testing, so I do not yet fully accept the hospital tests. I do not yet want to condemn this device – it seemed repeatable and the readings seemed logical, though extreme. Stay tuned for updates.Update Feb 2024I have now compared the Wellue device to a medical grade finger pulse ox while exercising on over 10 different days. The numbers do not agree. Not even close. The medical tests I had were prompted by false readings. The Wellue’s app is great, intuitive, informative and excellent recording of use. Far more useful than a cheap Fitbit knockoff. But if the readings are not accurate, then it is all a mirage.