Discussion SN - Using Samsung Health to roughly measure time till unconsciousness?

[x-Ace-x]

The app Samsung Health allows you to roughly measure your heart rate / stress / oxygen saturation. In the SN FAQ it's written the brain continues to function even with 30% oxygen level.

I wonder if it's possible to measure the time till unconsciousness using this app? Or it shows the wrong information and couldn't be trusted?

It's nothing required, but I thought would be nice to see how your oxygen levels decrease, thus giving you some information.

Any thoughts?

 

[Yomyom]

Everything that belongs to Samsung is unreliable at all

 

[x-Ace-x]

Everything that belongs to Samsung is unreliable at all

Why you think so?

 

[Yomyom]

Why you think so?

These programs are amateurish, they are not really intended to provide useful information.
Besides Samsung's Electronic Components are really sucks, Tend to break down quickly (from my experience)

 

[Whale_bones]

Your question made me curious, so I Googled it. Turns out there have been a lot of articles lately about smart phone apps that claim to measure oxygenation levels because of COVID. It seems pretty widely agreed by professionals that they don't work. They just measure your oxygen as normal no matter what, which makes people think it's correct, since when they use it they're already in a state of normal oxygenation. When researchers tested them to see if they actually correctly identified low oxygen in those who were experiencing it, the apps failed.

"Schrading and colleagues evaluated three iPhone pulse oximetry apps in a study published in 2019, and found that they couldn't reliably identify people who did not have enough oxygen. Their findings were consistent with other studies, which also found that pulse oximetry apps were inaccurate. A recent analysis from the Centre for Evidence-Based Medicine at the University of Oxford, which reviewed the research on apps in the context of the COVID-19 pandemic, also concluded that they are unreliable."

Apps Aren't a Reliable Way to Measure Blood Oxygen Levels

 

[autumnal]

The app Samsung Health allows you to roughly measure your heart rate / stress / oxygen saturation. In the SN FAQ it's written the brain continues to function even with 30% oxygen level.

I wonder if it's possible to measure the time till unconsciousness using this app? Or it shows the wrong information and couldn't be trusted?

It's nothing required, but I thought would be nice to see how your oxygen levels decrease, thus giving you some information.

Any thoughts?

Yeah, I would say definitely not reliable at all.

 

[x-Ace-x]

Your question made me curious, so I Googled it. Turns out there have been a lot of articles lately about smart phone apps that claim to measure oxygenation levels because of COVID. It seems pretty widely agreed by professionals that they don't work. They just measure your oxygen as normal no matter what, which makes people think it's correct, since when they use it they're already in a state of normal oxygenation. When researchers tested them to see if they actually correctly identified low oxygen in those who were experiencing it, the apps failed.

"Schrading and colleagues evaluated three iPhone pulse oximetry apps in a study published in 2019, and found that they couldn't reliably identify people who did not have enough oxygen. Their findings were consistent with other studies, which also found that pulse oximetry apps were inaccurate. A recent analysis from the Centre for Evidence-Based Medicine at the University of Oxford, which reviewed the research on apps in the context of the COVID-19 pandemic, also concluded that they are unreliable."

Apps Aren't a Reliable Way to Measure Blood Oxygen Levels

Thank you for your findings.

So the main differences between smartphone-based and standard oxygen meters:

Smartphone-based​	Standard​
One wavelength of light​	Two different wavelengths of light​
Some using white light from camera, making it less accurate (some Samsung devices use red and infrared light but still not accurate enough)​	Red and infrared light​
Sends light and captures data from same spot (rely on reflection of wavelength, can be skewed by light from environment)​	Sends light through finger and captures data from sensor on other side​

For the few patients whose oxygen saturation measurements were between 85% and 93%, the difference between the smartphone estimate and the ABG device varied between -5.5% and +2.5%. In other words, the readings become less accurate as the patient becomes more hypoxic.

Question: Should smartphone apps be used clinically as oximeters? Answer: No. - CEBM

Professor Lionel Tarassenko1 Professor Trisha Greenhalgh2 On behalf of the Oxford COVID-19 Evidence Service Team 1Department of Engineering

www.cebm.net

 

[Aap]

The last user feedback post I read here a few days ago was 29-41minutes roughly based on the individual posting.

 

[x-Ace-x]

The last user feedback post I read here a few days ago was 29-41minutes roughly based on the individual posting.

Sorry, what do you mean?

 

[autumnal]

As well as smartphone blood oxygen measurements being generally unreliable, also please note the following:

​

Pulse oximetry: Findings on bedside pulse oximetry [oxygen measurement] are misleading. This device only measures the relative absorbance of 2 wavelengths of light to differentiate oxyhemoglobin [1] from deoxyhemoglobin [2]; however, metHb [methemoglobin] absorbs both of these wavelengths equally. Therefore, at high levels of metHb [methemoglobin], the pulse oximeter [incorrectly] reads [an oxygen] saturation of 85%, which corresponds to equal absorbance of both wavelengths. This is an inaccurate depiction of the Hb oxygen-carrying capacity. [my emphasis]​

​

[1] oxyhemoglobin – blood that is carrying oxygen​

[2] deoxyhemoglobin – blood that is not carrying oxygen​

(REFERENCE)​

Summary: So even a proper hospital-grade pulse oximeter would give a deceptively incorrect oxygen reading when used on someone with methemoglobinemia (such as from SN poisoning).

I believe the only way to accurately determine blood oxygen levels in the methemoglobinemia patient is with a CO-oximeter, and unlike a basic pulse oximeter (which you can buy on the auction site for around USD $30), a CO-oximeter is a much more specialised and expensive piece of equipment at around USD $850 or more.

 

[Aap]

the user posted for at least 29 minutes after taking SN. Exact timing is unclear, as the user posted s/he would be taking SN in approximately 12 minutes.

 

[shipwreck]

the user posted for at least 29 minutes after taking SN. Exact timing is unclear, as the user posted s/he would be taking SN in approximately 12 minutes.

Which user?

 

[Aap]

I don't remember. It was one of the goodbye threads posted in the last 1-2 weeks. At around 15 minutes, seemed to be fine, at around 29 minutes, user posted he was feeling very sleepy and that it would be the last post. User posted at around xx:48 they would be taking SN at xx+1:00. Final post was at xx+1:29 if I'm remembering the times correctly. It would still be here if you dig a bit. No nausea or vomitting reported, and it sounded quite peaceful.

 

[shipwreck]

I don't remember. It was one of the goodbye threads posted in the last 1-2 weeks. At around 15 minutes, seemed to be fine, at around 29 minutes, user posted he was feeling very sleepy and that it would be the last post. User posted at around xx:48 they would be taking SN at xx+1:00. Final post was at xx+1:29 if I'm remembering the times correctly. It would still be here if you dig a bit. No nausea or vomitting reported, and it sounded quite peaceful.

It was @allovernow. Took SN at xx:05. Last post xx:29. Last activity xx:35. So more like 30 minutes. That's a lower bound.

User mentioned she had difficulty breathing.

 

[Living sucks]

It was @allovernow. Took SN at xx:05. Last post xx:29. Last activity xx:35. So more like 30 minutes. That's a lower bound.

User mentioned she had difficulty breathing.

In my findings ive noticed that people who were or are drug users tended to have longer times to symptoms and unconscious. Not sure why? Allovernow had indicated prior drug use. As did maggot666. And a few others.
most others felt symptoms in3-5 mins and unconscious in 15-30.
About a dozen reported breathing issues

 

[Aap]

I don't think you will find much of a link other than to say that perhaps younger people use drugs than older. One would expect younger people to remain conscious longer. Keep in mind PPH is geared for the older who are terminally ill.

 

[Living sucks]

My findings don't include any pph info. It's every documented account here from SS. The Potentially believable ones anyway.

 

[Aap]

My comment still holds. Unless you are specifically referring to active opiate users due to slowed gi motility, there wouldn't be a generic mechanism that "drug usage" slows death. Are you referring to opiates, Cocaine, benzos, alcohol, amphetamines, etc.?

 

[Living sucks]

I believe most of them used all of that and then some. I didn't document what drugs each person was using, I just noticed in researching the anecdotes several times that The members who revealed that they used recreational drugs tended to have longer times to symptoms and unconsciousness. It is only an observation