
Answer:
Pulse oximeters, which simply clip onto your fingertip, are non-invasive devices that can measure blood oxygen saturation as well as pulse (heart rate). They are relatively inexpensive (about $20) and can be purchased for home ("non-medical") use.
Although they are not as accurate as FDA-approved "medical" pulse oximeters, which cost much more and undergo more rigorous testing, comparison studies indicate that some (but not all) non-medical pulse oximeters can help signal when medical attention is needed in conditions such as COVID-19, asthma, and chronic obstructive pulmonary disease (COPD). For example, some research has shown that at-home use of pulse oximeters may lower the risk of death in people with COVID-19 as they are more likely to seek medical attention sooner, if needed, than those not monitoring blood oxygen saturation levels or COVID symptoms at home.
Sign in as a ConsumerLab member to learn the pros and cons of non-medical pulse oximeters, factors that can affect their accuracy (including whether or not anemia impacts pulse oximeter readings and if the devices should be used to detect anemia), tips for getting more accurate readings (including if you can take a reading while wearing nail polish), and which brand has performed best in studies and is our Top Pick. Devices we've reviewed include Atlanteen SB100 II, Beijing Choice MD300C23, Biolight M70, Bodymed BDMOXMTRBLK, Choice MMed MD300CN340, Contec CMS50DL, CONTEC CMS50M, Masimo MightySat, Nonin Onyx Vantage 9590, Roscoe POX-ROS, Walgreens OxyWatch C20, Zacurate CMS 500DL, and Zacurate 500 C, as well as the Apple Watch. In addition, we discuss the pros and cons of ring-type pulse oximeters such as the Wellue O2Ring and circul+ Wellness Ring by BodiMetrics.
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JOHN19153
April 01, 2024It appears that as of this date Walgreens no longer sells the Oxywatch C20. They do sell two of the Walgreens brand traditional fingertip pulse oximeters.
OxyWatch C20 is manufactured for Walgreens by ChoiceMMed and is sold as the Walgreen Fingertip Pulse Oximeter.
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Carol19106
March 26, 2024Is there a home pulse oximeter that tracks your blood oxygen levels and records it on a phone app? Like, tracking overnight? I’ve used one through the respiratory therapist at our local hospital, but then you have to return it to them the following day to read the data.
As noted in the following section of our article, certain ring-type pulse oximeters may be used for overnight monitoring, with information recorded on smartphone devices. However, these devices do have some downsides for some individuals, as discussed above: https://www.consumerlab.com/answers/best-pulse-oximeter-for-home-use/best-pulse-oximeter/#ring-type
Emilie21103
November 17, 2024Yes, Carol, there is. OxyKnight Watch is the name of it, and it is available from CMI Health.com I have no connection with, or financial interest in, this company other than that I purchased one of their products for my own use to track my SpO2 and pulse rate overnight.
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Lona19092
March 26, 2024The Zacurate CMS 500DL is available from multiple sellers on ebay, starting at around $20 incl. postage. I have no financial interest in this product.
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kerry19075
March 24, 2024I am a respirstory therapist and havr found several inexpensive pulse oximeters that work well and are comparable to the more expensive hospital oximeters. It is impoetant to leave on a finger for at least 15 seconds on a montionless finger. Also note the fluctuating red column going up and down in a stable pattern. If its not.pixking up properly the column will be erratic
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LEAH19069
March 24, 2024The Nonin Onyx Vantage can be purchased without a prescription as I did several months ago from medical supply house for the price as mentioned.
I have used the Nonin products for years and found them most accurate.
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rob19064
March 24, 2024how about pulseox devices designed for sleep like the emay and wellue devices? can you review those?
Please see the following section of our article: https://www.consumerlab.com/answers/best-pulse-oximeter-for-home-use/best-pulse-oximeter/#ring-type
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TS
March 23, 2024Amazon has Zacurate CMS 500DL. Is this a knockoff?
As noted in our article, the product available on Amazon is the Zacurate Pro Series 500DL Fingertip Pulse Oximeter, a newer version of the Zacurate CMS 500DL device, which has been discontinued. We are not aware of any studies comparing the performance of these two products.
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John19019
March 20, 2024Masimo is the best one by far. Not sure why CL penalizes products based on price. When it comes to health, price shoud be a secondary consideration.
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Christine18997
March 19, 2024You should mention that lower O2 sat readings are acceptable at higher altitudes. Working in medicine in CO as an RN, readings that would not be acceptable at sea level are at elevation. Particularly in the mountains.
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Patricia18990
March 19, 2024I wish you would test the O2 Ring made in China by ViHealth. This device fits at the base of a finger so has none of the difficulties of those which clamp to the end of a finger or toe. It can be worn over extended periods, providing both a current reading and, after disconnecting from the user, providing a clear record of O2, pulse, & activity during the period it was worn. It is, thus, of special value to individuals with respiratory problems who have to adapt activity and O2 use to their need. I have compared it with the classic fingertip device and have found it to be pretty accurate (as best I can tell).
ConsumerLab has not tested pulse oximeter devices at this time. However, we've added information about the pros and cons of ring-type pulse oximeters to the following section of our article: https://www.consumerlab.com/answers/best-pulse-oximeter-for-home-use/best-pulse-oximeter/#ring-type
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BartD
March 19, 2024I have the Wellue Oxyfit which i have used every night to test the benefit of my new Auto-CPAP machine. It never falls off (has rubbery grip). This has an APP that records data 4 hrs at a time. Do u have anything you've test with similar features?
ConsumerLab has not tested pulse oximeter devices. However, we've added information about the pros and cons of ring-type pulse oximeters to the following section of our article: https://www.consumerlab.com/answers/best-pulse-oximeter-for-home-use/best-pulse-oximeter/#ring-type
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Michael18972
March 19, 2024The massimo mighty sat has proven unreliable - ie: works intermittently - failing to display any results, then shuts itself off, as if your finger wasn't inserted at all. I've seen other reviewers on ebay note the same experience. When it does work, it seems to be accurate. Masimo is the gold standard for accurate oximetry in-hospital. I'm a respiratory therapist.
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micheline14332
March 20, 2022I didn't find the Clinical Guard oximeter that good, would not recommend.
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Sandy
December 05, 2021Can you use this to see your ox levels for anemia?
We've added information about the impact of anemia on pulse oximeter readings in the answer above: https://www.consumerlab.com/answers/best-pulse-oximeter-for-home-use/best-pulse-oximeter/#anemia
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Jeanne14323
August 11, 2021As an RN, I have had good luck with turning the machine over and reading through the finger pad if a person had on fake nails or polish. If someone is extremely obese, this could be problematic, but I have tried it both ways on people with normal nails, as a little test, and got the same readings. Sideways reading sounds quite awkward to me.
Sandra Collins
August 12, 2021Thank you!!! I have gel nails and going on a trip. Did not want to remove them. The finger pad is a great idea
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JefOneF
December 20, 2020Pulse Ox differences for people of color have been noted going back to 1998. Shameful this hasn't been addressed or solved by now.
https://pubmed.ncbi.nlm.nih.gov/18048893/
https://pubs.asahq.org/anesthesiology/article/102/4/715/7364/
https://onlinelibrary.wiley.com/doi/pdf/10.111
Jean19073
March 24, 2024Agree! I have made it my mission to inform my family and friends and my health care practitioners of the problems with the Pulse Ox on people of color.
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Ted_S
December 02, 2020We spend time in mountain cabins at high elevations (6000 - 10,000 feet) where the altitude causes a large drop in oxygen saturation. We need a meter that is accurate in the 80% to 90% range, and are willing to spend $100 - $200. Any suggestions?
William14315
April 21, 2021Though I am a physician, I cannot claim expertise, but I am a pathologist who subspecializes in blood diseases and coagulation (hemato-pathology). When a person moves to high altitude, they develop higher blood counts, but most importantly, their oxygen carrying capacity of the blood increases. Especially important is that hemoglobin (the protein that carries oxygen inside red blood cells) has a "dissociation curve" that shifts, allowing the oxygen to more easily leave the hemoglobin and go into tissues. These changes allow the body's cells to get more oxygen to compensate for the lower amounts in the air at high altitude. These changes take time to develop, usually a matter of a couple of weeks, but begins to happen fairly quickly. With pulse oxymeters relying on the more "red" color of transmitted light, that shows only the amount of oxygen being carried in the blood, the effect on the numbers seen on a pulse oxymeter may, OR MAY NOT, be helpful in high altitude situations. A more knowledgeable person than I am may be able to answer that question better. The only thing that is certain is that a person who is developing lung dysfunction in a COVID-19 infection would be a much greater danger when travelling to high altitudes, and this would be less likely if the person has already been living at high altitudes for awhile.
Jeanne14314
August 11, 2021Excellent information William! Thank you.
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Barbara14310
November 07, 2020Has ConsumerLab reviewed pulse oximeters? I clicked on a link but only found this brief statement talking about others' reviews.
We did not test these devices but reviewed the results for specific pulse oximeters published in independent studies by others, leading us select one as our Top Pick.
Dan19083
March 25, 2024Personally I feel the Innovo Deluxe iP900AP Fingertip Pulse Oximeter with Plethysmograph and Perfusion Index is possibly the best fingertip oximeter, but it was not reviewed.
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JCohen
September 23, 2020I'm curious about your comments on this video review https://www.youtube.com/watch?v=QvxjcNuMmiE
We watched the video, apparently made by the manufacturer of the DB products, so unclear how objective it is. In our article, we cite results from independent studies.
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Gene14296
September 23, 2020In terms of Amazon customer reviews, the ChoiceMMed Grey Finger Pulse Oximeter at $25 has good reviews. As a long-time (good) HR monitor user for athletics, I can attest to its accuracy on that score and it’s pulse oximeter readings closely jibe with what’s been found in the doctor’s office. I don’t know about its accuracy under 90, but if I had a steady reading there, at least during the covid-19 period, I’d be on the way to the hospital.
Other things to add about these finger monitors is that I’ve found they need to be held away from other electrical devices, such as a phone charger, the hand/arm should be flat not upright and lower than heart level, and it typically takes a few moments to a minute or so for the readings to become settle, all like in the doctor’s office.
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