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GlucoRX Nexus vs SD Codefree

googlegoss

googlegoss

Well-Known Member
Messages
195
Location
Redditch
Type of diabetes
Type 2
Treatment type
Diet only
Doctor gave me a Nexus about a month ago as well as 50 strips. She said I could have more but probably not on the scale that I would like them so purchase an SD Codefree which arrived yesterday. Tested on both of them at the same time and they were 3 whole points apart. Tested this morning as well on both and it was the same. I know that no meter is 100% accurate but which one would be the one to trust? Was really shocked to see the difference I must admit. Thanks.
 
I found this with my parallel testing. My SD reads between 1.5 and 3 mmol/L higher consistently. It is not a faulty meter. firstly may I suggest the following:
http://www.joslin.org/info/plasma_glucose_meters_and_whole_blood_meters.html

Also, the ISO standard covering glucometers defines specific accuracy requirements that all manufacturers are required to meet, There is an article describing this at:
http://www.diabetes.co.uk/blood-glucose-meters/iso-accuracy-standards.html

Hope this helps.
 
To answer the second part of the OP, I use the meter that reads 'low'as my main decision meter, and use the SD as backup and also to help me detect changes in readings when changing to a new pack of strips (My Neo can rise or fall by 1 mmol/L on a pack change) I use averages and trends to help me get a more accurate result, and also you can use your HbA1c result as a way of checking calibration.

If you are running close to hypo range,then trust the lower reading for safety. If your GP reduces your strip allowance, then at least you will know how the SD was comparing, and adjust accordingly.

I think the advice on this site regarding target levels, as given in the newbie startup data are still expressed in the old calibration terms, and modern meters will be reading higher. I think this should be clarified @Administrator I believe a factor of 1.2 applies, but I could be wrong in this
 
Dear googlegoss, for a start, none of them are as accurate as we like to believe. What we can expect of them, though, is that they're reasonably consistent, and the better ones are. In my experience the SD Codefree is okay at that. I recommend you pick one to use, then when and if you run out of strips, switch to the other. Don't switch between them. That way madness lies.

I used to test between all three of my meters on the same blood drop, but quickly realised it wasn't getting me anywhere realistic.

Good luck sorting it out.

Oh, and preferring the lower reading one sounds good advice.
 
Using 2 meters simultaneously makes life very frustrating. Much better to stick to one, keeping the other for emergencies only. Personally, being on diet only, when I do re-tests for whatever reason, I average them for my own records. If 2 or more readings are very close, I take the highest one (I have no risk of hypos)
 
Yesterday my SD Codefree gave a misread. My Neo registered 12.6 mmol/L, but my SD registered 24.3 on the same drop. A repeat of the SD gave 15, and a retry of the NEO gave11.2. This is not the first time my SD has read high like this. i have had it reporting a warning (33+) when my Neo was showing around 15. My SD consistently reads around 2 points higher than the NEO, but I do get days when it can be 5 or 6 points higher on an individual reading, but it averages out at the 2 up over time.
 
Re-test? As you did.

My Optium Neo, which is my most accurate meter, gets it wildly wrong occasionally and I have to waste a second strip. Once it told me my BG was 1.8! (It wasn't, though I took a load of Dextrosols first before I checked.)

I'd regard that as a part of the glory of testing.
 
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