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Dexcom seems to be coming close. I wonder if this is something Apple is working on. So far none of their Watch features require FDA approval (class III). The ECG feature is considered a class II product which means it isn’t considered to have as much risk. It received FDA clearance. I think a big growth area for the company could be to get further into health tech. A big thing right now is continuous health monitoring. I’d actually rather see Apple work on health wearables than a VR headset.

Dexcom is good because it makes finger sticks unnecessary but it still requires a transcutaneous electrode. This wouldn't work with the watch. The sensors comm with the phone so doing it on the Watch should be a breeze.

BTW, FDA Clearance is a much lower level status than Approved. Clearance basically means that a company has sent in the docs to the FDA and it doesn't look immediately deadly. Lots of work has to be done to progress to Approved.
 
Does anyone know how accurate the current watch-style wearables with oximeters, such as those from Fitbit and Gamin, are at measuring oxygen level?

I've been assuming Apple hasn't implemented such a feature yet because current hardware/methods aren't up to a credible standard.
Anyone know if blood oxygen monitoring can be used to make workout tracking more accurate? I’ve found that an Apple Watch is essentially worthless for strength training workouts (it just guesses an average calorie burn), and “walking workouts” end up burning about the same as a strenuous hour long strength training session. It’s clearly very inaccurate at tracking anything but heart rate. Could O2 sensing make this more accurate?
Calories 'burned' is always an estimated calculation, at least on a consumer level -- I'm not aware of all available in the professional medical field. Nevertheless, calorie counting, intake and used, is only a (small) portion of fitness and estimates are well enough to allow a person to adjust their consumption amounts. Additionally, you'll probably be surprised that walking can burn as many calories as weight-training. I know this from personal results as well as reading lots of articles about a wide variety of workouts and results studies. One quick search example:

Cardio vs. Weight Lifting: Which Is Better for Weight Loss?

Basically, the calories estimate accuracy is probably not nearly as low as you believe.

Lastly, I don't know if oxygen monitoring would improve a calorie estimation algorithm, though the relationships claimed in the following article would imply it might.

Calories Burned Per Liter of Oxygen Consumed
 
Sensing the SpO2 is a real aid to those of us with lung issues. It would be really helpful if we can set our own lower limit for getting an alarm. Some of us are OK down to 90% and want to be notified when it drops below that. That is the floor many of us have set by our Dr.
I am just so pleased you are going to release this!!! :)
 
Man as much as I love Apple Watch I REALLY REALLY wish it would work with Android! I have no desire to buy an iPhone.
You could just make your life easier and get over that mental hurdle of not wanting to buy an iPhone. They're great devices.
Or buy an iPod touch. It would manage the Apple Watch and, of course, could be utilized for plenty of other tasks, plus would allow @Swampbaby985 to try/acclimate to iOS and better decide if a platform switch is desired/satisfactory with a much lower initial investment cost versus an iPhone.

Just sayin'. :)
 
Man as much as I love Apple Watch I REALLY REALLY wish it would work with Android! I have no desire to buy an iPhone.
I'm with you. My iPhone is fine, but I prefer Android as a phone OS. I really love my Apple Watch though, so I make do with an iPhone.
 


The Apple Watch Series 6 will add blood oxygen monitoring to its features list when it's launched later this year, according to a new report from DigiTimes.

applewatchs5designheartrate.jpg
The Taiwan-based website's sources say that the next-generation Apple Watch has undergone "smooth development" thanks to close collaboration between Apple and Taiwanese company ASE Technology, which has obtained major backend orders for the device.

Leaked code found in iOS 14 has previously suggested Apple is working on an Apple Watch that can detect blood oxygen levels.

Based on the discovered code, Apple will provide notifications when blood oxygen levels drop below a healthy threshold, which is right around 95 to 100 percent saturation. A drop in blood oxygen level can suggest a serious respiratory or cardiac problem.

It was not clear from the code if the feature would be limited to new Apple Watch Series 6 devices or if it would come as a software update in watchOS 7, but today's report suggests it may be exclusive to the Series 6.

When the original ‌‌Apple Watch‌‌ was released back in 2015, iFixit actually discovered that Apple's heart sensors have the capability to monitor blood oxygen levels, but Apple has never activated it.

Other smartwatch and fitness tracker makers including Google-owned Fitbit already offer blood oxygen monitoring features in some of their wearable devices, so Apple is playing catch-up in the area, but that could mean the company has a more advanced implementation of the feature in the works.

Apple Watch Series 6 models, which are in development for a fall launch, are rumored to feature faster performance, better water resistance and improved wireless transmission for faster Wi-Fi and cellular speeds.

These improvements will be made in part through a rumored swap to liquid crystal polymer or LCP material for the flexible circuit boards expected to be included in the Apple Watch Series 6, according to Apple analyst Ming-Chi Kuo.

Article Link: Apple Watch Series 6 to Feature Blood Oxygen Monitoring Sensor
HI: a few months ago Apple removed an app that did this perfectly created by a Doctor in Norway see his web pagr: https://digidoctech.no/
 
They're obviously all in on AW being a health and fitness device, both in terms of software development and new hardware. Which isn't really what I want, but I get it. It's still the best smartwatch out there for communications, even though apple is allowing it to kind of stall in that area in favor of health.
 
Well if it’s anything like garmin’s bloodox sensors, it’s a complete waste of space, battery, money and everything else. They are completely inaccurate and the data shouldn’t even be shown to people. It’s irresponsible to say you can measure spo2 levels and then provide the data that current wrist based devices do. It’s misleading, meaningless garbage data simply to sell a bullet-point feature.
Maybe Apple developed some new reliable way to do this, but if not - just don’t even bother enabling it.
 
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I currently have a S5 in stainless and not going to give that up to get the Blood Oxygen Sensor. My brother designs and builds medical instruments. Knowing that his company developed an precision Oxygen sensor years ago, I asked him about it, and his recommendation was to buy one of the cheap finger units from Amazon! I got one and I get pretty consistent readings, like the EKG feature, which quite good, I rarely take readings anymore. I use a blood pressure cuff by iHealth and the heart rate monitor most of the time. Doesn't solve my main problem which is sitting and eating too much!
 
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I think it will be very hard for Apple to build that into the Watch along with all the other sensors. Looking at the leading Continuous Glucose Monitoring devices, that have some type of sensor under the skin and send data to the smart phones. Diabetes is a very serious condition and requires accurate and consistent readings. Probably more of a liability for Apple if not done right.
 
If you combine oxygen sat with sleep tracking, you've got yourself a pretty handy test for sleep apnea! That would be truly amazing.
 
Apple Watch 5 sensor already supports SPO2, I’m not paying more cash to get drip fed functionality every 12 months, sick of Tim Crook, if Apple don’t start to treat its customers better I’m going to dump them, it’s an abusive relationship and I’m sick of it
 
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My guess is that basic sleep tracking functionality will be provided in all watchOS 7 AWs but the AW6 will probably support some advanced sleep tracking as a headline feature. Specifically:
  • Use of the new blood oxygen sensor to do a simple form of sleep apnea tracking (akin to the simple EKG feature in AW4/5).
  • Dedicated circuitry to ensure low-power modes of heartbeat/other sensors during sleep mode, which enables better data collection for advanced sleep tracking.
  • Faster charging to make morning top-offs quick while getting ready for the day ahead.
  • Apple will probably tout their magic algorithms developed by their health team to be best-in-industry.

These are just guesses because otherwise I don’t really know what else AW6 could offer other than standard speed and battery improvements. AW5 was already a sleeper update. Two years like that would be disappointing.

You are spot on here. Also, they *MAY* roll out some illness detection and overall health monitoring by popping out a quick ox check at 30-90 min intervals during the day when you're not active and roll out optional ox checks during workouts as well, though that's going to hit battery life negatively. Apple themselves won't say you're ill, but the data will be in Apple Health and third parties (particularly research and health orgs) will be able to use that data and apply some analysis. Will be marketed as a response to Covid indirectly.
 
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I would love to know how this can work. As far as I know, O2 meters work by transmitting light through your skin (typically a fingertip or earlobe) to a receiver on the other side....
After a bit of web searching, I found an article about reflective pulse oximetry from 2016. It's an interesting read. The conclusion is of particular interest:
ScienceDirect said:
Reflectance pulse oximetry: Practical issues and limitations

...
Based on the performance of the oximeter, monitoring SpO2 at the wrist using the reflective mode presents challenges with regard to clinical use. Another limitation is that the reflected red and infrared pulses can only be used for specific areas, such as a radial artery; thus, most areas of the wrist are not available for monitoring. In addition, a slight position change at the measurement site significantly affects the performance of the oximeter. Thus, the focus of research studies involving oximetry should be on choosing appropriate measurement sites, and optimizing pressure, ambient light, and SNR.
Now I'm especially curious what Apple may have done to avoid these problems. Is there a suitable artery underneath where a Watch typically rests? If not, what are they measuring? And how do they deal with position changes?

I'd really love to see a white-paper on this feature.
 
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