Oxymeter wayyyy off!

Hello. My oxymeter readings always seemed to low - between 89 and 91. I started to use medical-grade oxymeter and I actually have SPO2 between 97 and 99. I see this as problem because in SPO2 the most important range is 85-100, so if the reading is off by 8%, it is actually 50% error. That is not acceptable.

Jan

  • Moreover, due to %96 is not a good value, i can not take it as a reference. Because Garmin mostly shows %95-96, typical.

    For istance, if your real Spo2 is %100, Garmin will show as %95-%96 already. So, please try on a healthier person with Spo2 value of +%98 and share here. I'm sure that you will see %96 or below on your watch. 

    But please share a footage, not a picture. Because if i try 20 times, of course i can catch one that meets with the pulse oximeter; even a stopped watch is right twice a day !

  • Can we close this thread now? TheOtherPill just did a mic drop. Should be end of the discussion now. 

  • You should really stop now. Try direct communication with Garmin. What do you expect for the end result here? Someone to agree with you? Then what? Continue to have “immaculate results” when compared to products purchased from Amazon, CVS etc.?

    Forward your “””””findings”””” to Garmin

  • For istance, if your real Spo2 is %100, Garmin will show as %95-%96 already. So, please try on a healthier person with Spo2 value of +%98 and share here. I'm sure that you will see %96 or below on your watch. 

    Despite posting evidence contrary to your claims, you still continue to argue. It’s obvious you don’t understand the significance of pulse oximetry, what it can and can’t measure, what normal values are, how they are influenced or how any of it relates to arterial partial pressure oxygen (PaO2) saturation. Go away and at least research the oxyhemoglobin dissociation curve and how it relates to pulse oximetry readings. Fully understand the mechanisms that can cause a left or rightward shift of the curve and then come back and tell me that 96% isn’t a reading from a “healthy adult”.

    Let me ask you this…how do you know your pharmacy toy is correct? Is it a case of you like the number better?

    In medicine, we use machines such as the Corpuls3 because it has technology just not available in consumer devices such as Masimo Rainbow Signal Extraction Technology (SET).

    Unfortunately for conventional pulse oximetry, venous blood moves every time the patient moves or breathes. This causes conventional pulse oximeters to display false low or high SpO2 and pulse rates–resulting in false alarms as high as 90% in ICUs and recovery rooms.”

    ”To date, more than 100 studies have shown that Masimo SET® outperforms other pulse oximetry technologies, providing clinicians with unmatched sensitivity and specificity to make critical patient care decisions.

    www.masimo.com/.../

    There’s a reason that your pharmacy toy is under $50. A medical grade device that professionals rely on start at $400+ for a basic finger probe and are over $12k for something like the Corpuls3. And my Tactix Delta is giving readings identically under an ideal environment. That is incredible given Garmin make zero claims about it’s performance being anywhere near a “medical grade device” and in fact go out of their way to make it clear that there are a lot of limitations.

    This is literally my job, I’m an intensive care paramedic with a masters degree in intensive care….only have 20yrs experience both in the UK and Australia. 

    Oh dear:

  • Oh please, this is not a mainstream talk show.

    An instrument with a specific error, say +-5%, may well give a perfect measurement once and it won’t make it any better.

    For an instrument to be reliable it must give precise readings each and every time and, as written before, just the fact that many times it doesn’t even give me any measurement at all is a clear indication that it’s not precise nor reliable.

    BTW I worked for years in a research team which evaluated medical instruments for years, so I have quite an experience on the matter.

  • Oh so you should know this isnt a medical grade device then. And from what I’ve seen with other people posting pictures on here that actually know what they’re talking about, it leads me to believe that you are doing it wrong 

  • it leads me to believe that you are doing it wrong

    Huh? Doing wrong, what? I just told my Fenix, of all the consumer grade devices I've tested is the least reliable. 

    Having said that please stop being so rude with those who don't share your opinion: we don't know each other. Life is good.

  • I don't claim that wearable devices are %100 correct. What i mean is Garmin's Spo2 sensor is the worst among others ok ? You don't have to have a medical career in order to have an idea about the accuracy or quality of a pulse oximeter, as you don't have to be a cardiologist to determine your own heart rate and evaluate the HR accuracy of your device.

    I'm not arguing. Here is a forum and i'm writing about my ideas and issues regarding my device. 

    (Meaning of forum: forum is a place, situation, or group in which people exchange ideas and discuss issues.)

    If you search on this forum, you'll meet a lot of subjects that people are complaining about the Spo2 accuracy of their devices. And i'm one of them because my experience is negative. What do you except me to do ? Pretending to be happy with my false measurements ? 

    how do you know your pharmacy toy is correct? Is it a case of you like the number better?

    My mom has been hospitalized recently due to Covid 19. That's why i purchased this pulse oximeter. And while she was at the hospital as being attached to a patient monitor, we also checked her oxygen levels via this pulse oximeter. Moreover, for inspection purposes, nearly all doctors and medical staff use that finger type of devices, not patient monitors.

    I'm not a medical staff but that doesn't mean i don't have any knowledge.


    Even a stopped watch is right twice a day ! I'm talking about general experience whic is poor.

  • Look, we're going around in circles here so this is my last post on this subject.

    You have come to a support forum, not a general forum. People who frequent these forums are generally those that are having problems and are seeking answers or those that are enthusiasts and like to test the latest betas so generally have a little more experience with the features than your average Joe. What this means is that these places become an echo chamber in which a problem that a small number of users have, seem magnified so forum members make the claim "EVERYBODY is having this problem" or "ALL Fenix watches...." or "WE can ALL agree...."

    This is the issue that many of us have taken exception to with your comments, and that of some others. Taking your specific issue and trying to generalise it to the rest of the population is a bad idea because the rest of the population who are happy with their devices don't come to support forums to proclaim "nothing to see here...everything is working as expected".

    I'd say I fall into the enthusiast category as to why I am here. I have had every model of Fenix including their sub models such as the Garmin Marq Expedition and the Tactix lines. I like to test new features and provide feedback that can improve things for all users. I HAVE NOT seen the same issues a number of forum members have. All my devices have worked as expected. I have shown a number of times in this thread that I am not having the same issue as you, as have a number of other users, which means no "we can't all agree that there is a problem".

    Your insistence that your cheap, no name, pharmacy device is in any way comparable to one used in a clinical setting is laughable. It even has a display issue which can be clearly seen in this picture.

    Yes, medical professionals will use these type devices for a quick spot check, but are not using the cheap ones from the local pharmacy and they will not be relying on them to make any clinical decisions. The models that are used in healthcare are significantly higher quality and using much better technology. For example, the Nonin Onyx II is a $350 device and uses PureSAT technology.

    And the Masimo MightySAT RX starts at $375 and uses their Rainbow Signal Extraction Technology:

    I visit patients every day who also use the automated BP cuffs from the pharmacy. I do not rely on the information from their devices to make clinical decisions because they are not medical grade, never get calibrated and are intended for consumers only. They cannot read correctly in a range of conditions; Atrial Fibrillation for example, really throws off the consumer devices yet my CorPuls3 reads it perfectly.

    So whilst I acknowledge that you (and SOME other users) may have an actual issue with either your device or how you are using it, it doesn't mean that ALL Fenix devices have the same issue, as has clearly been shown in this thread a number of times.