WRINERY M170 Pulse Oximeter

Great pulse Ox. Measures O2, PR, and Respirations. It is efficient and as quick as any other pulse ox I have owned. This one looks especially pleasing and works great.

Works really well and the pulse ox takes respirations. I am a CNA and I take alot of vitals. So, it is definitely very handy.

I was in the hospital with covid for 15 days so that’s when I learned how important oxygen levels are. The nurses & doctors advised me to purchase a ‘pulse ox’, which is what they called these gadgets, so that I could monitor my oxygen levels at home. I had one that came with a kit but it wasn’t always reliable so then I saw this one and purchased one for both my husband and myself since we both had been in the hospital with covid and we both need to keep a close watch on our oxygen levels. We both LOVE this particular monitor because it’s VERY easy to use, read and see the readout. It’s accurate and only takes a few seconds to get the readout. It’s lightweight and easy to carry with you as it comes in a very secure case with a zipper which protects the pulse ox from any possible scratching or damage if dropped. The case isn’t too bulky or big so it fits into my purse easily. It also has a nylon (?) cord that attaches to the monitor which enables you to wear this around your neck if you choose to do so. The colored readout is very easy to see, unlike the other cheaper monitor I had but the great thing is that this monitor is very reasonably priced too so it’s a no brainer – get this one if you need to have accurate, easy-to-access readings of your oxygen. We rely on ours completely and are very happy with them. We purchased these in May and they’re working extremely well so far.

What to say about or report on my WRINERY® finger pulse oximeter, or anything else?

1. Wrinery is the branding of this particular model manufactured by Shenzhen Fitfaith Technology Co. Ltd (PRC). The model is M170 and is covered by FDA’s referred to Section 510(k) premarket notification (September 2017). So are its oximeter models A300, A310, M110, M120, M130, M150, M160, and M230. Those may not be “Wrinery” branded.

2. The equipment came complete as advertised. The user’s manual (v 1.0) is comprehensive and informative, in excellent print (fine print, but readable), double-sided, 1 sheet of glossy paper. There are no distributor details for the US or for anywhere else. The manufacturer attends to in-warranty issues (the address is on the packaging).

3. In addition to showing the values for SpO2 (oxygen saturation) and PR (pulse rate) the oximeter also calculates and displays the PI (perfusion index) result and that for RR (respiratory rate). The software of the meter is v 1.0 as shown by the clear and tidy OLED screen (of fixed screen orientation).

4. For those mathematically inclined and knowledgeable about statistics, the manual publishes equipment’s measuring accuracy (“A”). It shows the A(subscript root mean quare) for (i) SpO2 to be 2% (80-100% range), and 3% (70-80% range), (ii) for pulse rate 2 bpm, (iii) for perfusion index 1%, and (iv) for respiration rate 2 “rpm” (respirations per minute).

The manual informs QUOTE: A(subscript rms) is a statistical calculation of the difference between device measurements and reference measurements. Approximately two-thirds of the device measurements fell between +/- A(subscript rms) of the reference measurements in a controlled study. UNQUOTE. Hm, I am unsure how to interpret that.

5 I had the occasion to visit an after-hours medical centre for urgent medical attention to my wife. This prompted me to bring along the Whinery oximeter to see if during the waiting time (been there before) a friendly triage nurse could hook me up to one of their clinical Vital Signs Monitor (VSM) for checking my oximeter against the ‘real thing’.

There was such nurse, and the VSM was near-new! With one middle finger clamped by my oximeter and the other one by the VSM oximeter I compared the two instruments for readings of SpO2 and PR. This for an uninterrupted length of time of 6 to 7 minutes. Then the VSM had to be wheeled away!

The VSM was very fast in showing measured values and fluctuations (in comparison with the oximeter tested). I am sure my exited body caused the up and down readings for SpO2 (lowest 93%, highest 98%, but far more common were 96% and 97%) and the up and down PR readings. My oximeter tenaciously followed (or chased) the VSM readings, with a lag of a few seconds. During the several ‘steady’ state periods during the testing my oximeter readings matched those shown by the VSM. Hurray!

Keeping eyes on two meters and each showing two variable readings to compare I was not capable of watching and comparing PI and RR values at the same time. Too much data flow to my brain distracts me from concentrating on the main objective of seeing how the SpO2 measurement by the Whinery oximeter fared in this particular ‘clinical setting’.

6. For ordinary use at home, an oximeter also capable of producing PI and RR readings is unlikely of great use (unless you’re data-mad, or gadget mad). This may explains the existence of many oximeters that show SpO2 and PR only.

7. I keep paper records of oximeter data as trends over time of measured values seem more meaningful than one-off readings. It would be nice to have an oximeter that is BT capable for data transfer. They exist, but then finding an app able to receive and process the oximeter data may not be that easy. My foray in Apple’s app store was difficult because the search functionality for apps related to oximeters is abysmal. Persistence will help (use a variety of search words). Could developers please be more attuned to what search words would usefully apply to their apps for bringing these up? No, I have not settled on an app but now I can ‘trust’ my oximeter I might look for an app that lets me usefully input data manually. I only received the oximeter just over 14 days ago!

Hope this helps.