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PULS OX NOT MEASURED DURING SLEEP

Former Member over 5 years ago

I bought a vivamart 4 to see the pulse oximetry during sleep. I use a cpap machine for sleep apnea and I need to know if oxygen saturation is adequate during use. First, the pulse oximetry is totally false, nor does it approach, an average saturation of 70% is to be in the emergency room and is the average offered by the vivamart 4.

Second, DO NOT MEASURE THE PULSIOXIMETRY ALL THE HOURS YOU SLEEP IN. I have not been able to measure more than 4 hours, from 1.17h to 5.17h. They tell me on the SAT that it only measures a period of sleep time. This is so?. Has anyone else happened? I want to know to take the relevant legal measures, I think that if this is so, it is a hoax, I bought the bracelet to measure the pulse oximetry when I sleep, all the hours I sleep, not only Four hours of sleep.

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Former Member over 5 years ago +1

PulseOx is measured a good 5 hours from your defined go-to-bed time (i.e. NOT the actual time the watch detected you sleeping). E.g. I've set my "bed time" to 2am. PulseOx measurements stop at around 7…

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0 Former Member over 5 years ago

PulseOx is measured a good 5 hours from your defined go-to-bed time (i.e. NOT the actual time the watch detected you sleeping). E.g. I've set my "bed time" to 2am. PulseOx measurements stop at around 7:20am every day, even though I've went to bed around 3am and 4am in the last days and the watch detected it correctly.

For better measurements make sure to wear the watch ABOVE the wristbone and properly tight.

0 Former Member over 5 years ago

Rule number 1: don't use it for medical purposes and diagnoses. There are multiple warnings about that in both the app and manual. To answer the question: yes it's inaccurate, especially when it has to measure PulseOx for a longer time.

0 Former Member over 5 years ago

Both my wife and I use vivosmart 4's. Generally we have found that both begin measuring pulse ox 2 hours after it detects we have begun to sleep, although it sometimes varies. Both of our pulse ox's correspond fairly accurately with those from medical grade equipment, mine measures about 2% low. My wife does use a CPAP and her pulse ox data corresponds with breathing data pulled off the CPAP machine. In other words, when there are no mask leaks, etc, her measured pulse ox is about 95. If she has a "breathing episode" as recorded by the CPAP there is a corresponding drop in her pulse ox.

Here are some suggestions:

1. Sorry, as per the documentation it only measures pulse ox for 4 hours per night;

2. It seems to take about a week of 24 hour a day wear before it starts to accurately measure sleep cycles;

3. As previously mentioned the band has to be located above the wrist bones and fairly tight.

0 Former Member over 5 years ago in reply to Former Member

Hi, thank you very much for the answer. If you were so kind, I would like to know where in the manual it explains that it only measures 4 hours of pulse oximetry at night. I have not read that warning in the manual, if so, I would not have bought it. This is what happens to me, 4 exact hours, from 1.17h to 5.17h, not one more minute or one minute less. I use a cpap and also a medical pulse oximeter throughout the night. I wanted to see if Vivosmart 4 followed a trend similar to the medical pulse oximeter, not in values, which of course are not reliable because it is not a medical device designed for it. Vivosmart 4 marks (during those four hours, nothing more) an oximetry of between 70% and 82%, at most. In these periods of time, the medical pulse oximeter marks an average of 94%, which obviously has nothing to do with it. I did not buy the Vivosmart 4 to use it for medical purposes, of course not. I wanted to see trends, if more or less marked ups and downs similar to the pattern of the medical pulse oximeter, for me it was enough. The measurement is suitable for a cubist picture, but it does not approach a reliable trend. In apnea saturation drops the medical pulse oximeter marks drops of up to 90%. Vivosmart 4 same mark 70% than 80%, does not follow the pattern at all. And when the average of the medical pulse oximeter is at 95% it can also mark 70%, it does not follow a pattern consistent with reality. To that I add that it only measures 4 hours. I am very glad that your wife and you are working properly, it is not my case, I wear the band on my wrist and tight, but it is not reliable or in trends. I would not trust my health to a band that is not designed to measure with total reliability, I wanted to see if it helps me to have a curve tracking. In my case, from my experience, not even close is pure marketing. And this, for me, is a hoax. Thank you very much for the answer.