Replies to This Discussion

Permalink Reply by Scott Wilkins on May 12, 2012 at 9:35am

I'd like to start by saying in the past years a number of questions have come up from many places about the accuracy of BG meters. Some of the questions getting up to the FDA level and other legal avenues. I've not heard any real outcome from these questions though.

I'd start with Insulet on the validity of your PDM, or the possibility you may have a bad one. In my testing so far (I've been on my Omnipod for about 1 day so far...) I've found my PDM to be about 10% to 20% lower than the other Freestyle meters I own. Which seems to be the norm from other people's posts here.

In your test, you mention "from the same stick" Did you actually use the same stick twice? If so, that would invalidate your reading right off. The test is a very tightly balanced equation of electrical resistance upon chemicals. Once a strip's been used, it's worthless. You'd be better off testing individual strips once only from the same bottle many times before drawing a conclusion.

Good luck with your findings.

Permalink Reply by Gil DePaula on May 12, 2012 at 12:31pm

Scott,

I think Tinkersmom said from the same stick (prick), not from the same strip. A strip won't let you use it twice, if I'm not mistaken.

Cheers,
Gil

Permalink Reply by Scott Wilkins on May 12, 2012 at 7:04pm

Yep, read that the second time. Thanks for the affirmation.

Permalink Reply by Helmut on May 12, 2012 at 9:43am

Test with the control solution. The result should be 104 mg/dl.

Permalink Reply by Steve D on May 12, 2012 at 10:12am

This is a question that has plagued me for years. My PDM has always given me lower (about 10-20%) then any other meater, When I was concictently wearing a Dex I once was tesing on the PDM, reading my Dex, then testing via One Step system. Never had concistent results, so I decided to go to my Endo for some answers. She could only suggest that I get a test done in her lab, then do a test myself on the PDM and the Dex and just figure what the differences were approzimately and apply those differences each time I do the testing myself. On that day the lab test she did was the closest to the PDM (Freestyle), the PDM test was approzimately 5% higher, so that is the formula I use whenver I do a fingerstick.

And also, I agree with Helmut.
Test with the solution on all meters used.

Permalink Reply by EllasMom on May 12, 2012 at 5:01pm

Our PDM was consistently lower with the butterfly strips if we used the code 16. So I tested it using code 16, 17, 18 and 19 against my accu-check and code 19 gave us numbers much closer to the accu-check which we'd been using, with much success, before starting the omnipod. So now we use code 16 butterfly strips with code 19 setting in the PDM. Works great.

Permalink Reply by Scott Wilkins on May 12, 2012 at 7:05pm

Very good info. I also have an Accu-check meter which I think is very close to reality, so I'll check them side by side too.

Permalink Reply by mikep on May 15, 2012 at 6:38am

very interesting.

Here's what I just did.

Same finger, same blood drop.

Omnipod (code 16) - 67 (no hypo symptoms)
New iBG Star Meter - 100
Omnipod (code 19) - 87

For the record, I've used the Omnipod Meter since I went on the Omnipod 2+ years ago. I've heard the same though, that it typically runs on average 10-20% lower than other meters.

Permalink Reply by mikep on May 15, 2012 at 6:55am

oops and I forgot to add : Dexcom CGMS - 81

Permalink Reply by mikep on May 15, 2012 at 7:12am

Just did another test.

Omnipod (code 19) - 76

Omnipod (code 16) - 63
iBG Star - 92
Dexcom - 78

Permalink Reply by EllasMom on May 15, 2012 at 7:40am

Yup. Just be careful - code 19 works great if you are in range. If you are high, code 19 will say you are super high. Like 200 on accu-check aviva = 290 on omnipod code 19 PDM. So if the number you get doesn't make sense, double check it.

Permalink Reply by Steve D on May 15, 2012 at 9:52am

How does one acquire "code 19"? I can only get code 16 and have never seen another code since about a year ago. Pls advise.

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