By Bluegill88 Latest Reply 2012-06-11 08:46:09 -0500
Started 2012-05-15 10:20:20 -0500

My wife is a diabetes just as I am. So today I tested my B/G with her meater and I got 199. I then check my B/G on my meter and I got 156.
My question is why is there so much difference in these two reading. Is one meter better than the other?
Looking to see what kind of answer I can find.

Tags: devices

28 replies

re1ndeer 2012-06-11 08:46:09 -0500 Report

One very mportant factor among different blood sugar meters is whether they display the glucose levels as whole blood, or as plasma equivalent.

Different meters depending on the brand, register a different reading.

This could give you quite a variable in your readings.

diabetesfree 2012-06-11 07:44:55 -0500 Report

Try taking a look at the bottle the test strips are in. If either one of them is close to the expiry date, I would be wary of any results you get from it. Typically, there isn't much variance between the same meters, but test STRIPS can be adversely affected by a number of things. Age of the strips, temperature they are stored at, exposure to sunlight, etc. Of course, this is all assuming that the meters you are using do not use coding of any type and that you have entered the right codes into the meter that match the test strips. A code mismatch will provide incorrect results. Even if both meters have codes entered correctly, there can still be a difference due to how the strips themselves are coded. Each "code" assigned to a test strip defines what glucose range the meter is most accurate at. If you are using test strips that are coded for someone else, the readings may not be accurate in the range you usually test at.

Set apart
Set apart 2012-05-17 08:12:09 -0500 Report

One of the most important things I learned here on DC is to wash your hands and test again! I think James said this! It works, sometimes you can have something on your fingers and not even realize it!

jayabee52 2012-05-17 14:50:46 -0500 Report

yep I said it, and have to remind myself over and over again too. Sometimes I will get a higher than expected reading, so I go and wash my hands and sometimes my expectation of lower readings were correct, other times, like on last Tues, I had an unexpectedly high reading and washed fingers and tested again and it was (gasp!) 20 pts higher! But I did not have a lot of control over what was served for meals.

Nana_anna 2012-05-16 16:26:39 -0500 Report

When my sugar is high on, and I have checked on my left hand. I go to the right hand, and its always 10 degrees higher or lower. If its in the same number such as 214 on the left and 220 on the right, then I know its up. Mine is usually that high anyway.

Bluegill88 2012-05-16 21:10:14 -0500 Report

Thanks for your point of view. It helps me know that others are having the same problem, and I am not along. You have really help me feel better about the two reading I got yesterday.

Nick1962 2012-05-15 11:34:23 -0500 Report

Most meters have a 20% "margin of error". Something I didn't know until I signed up here. When i found out i almost went nuts because I'm so anal retentive about things. Luckily, the old dinosaur Medisense (Abbot) Precision Extra I use proved to be right on when I finally did get the calibration juice. Further discussion lower down in this thread

GabbyPA 2012-05-15 13:10:48 -0500 Report

Yep, Nick is right. There is an acceptable margin of error. I don't know who thinks that 20% is acceptable, but it seems to be.

The other thing could be that even when you test at the same time, there are such little differences. Did you use the same finger prick? Did you do it immediately or was there a time lapse? I know for me, even if I test different fingers I get different readings.

What I do is check mine with my doctors and see if they are running close. If so, I try not to panic too much about the readings. I have to trust something, and if I keep worrying about how accurate it is, I will go nuts. Just like Nick is a point where you just have to accept.

Bluegill88 2012-05-16 21:16:10 -0500 Report

Thanks Gabby for your in sight, and your comments as well. I wiill be reading more on this subject to get a better understanding on what I am going through. You know I have never use the right hand, I have only use the lleft fingers. Never given that any reason to use the other hand. I have learned something today.
Man it is so much you have learn with being a diabetes . I really appreciate your knowledge in this field.

GabbyPA 2012-05-18 07:42:36 -0500 Report

I'm learning just like everyone here. You guys teach me so much and remind me of things I forget sometimes.

jigsaw 2012-05-16 19:01:31 -0500 Report

It's the FDA that approves the +/- 20% margin. There are measures being taken to tighten this margin!

Bluegill88 2012-05-15 15:28:19 -0500 Report

Thank for your reply. I can some how understand what you are saying, but I was really shock when I saw the two reading.

Bluegill88 2012-05-15 10:29:52 -0500 Report

I need to explain the kinds of meters we are using. She my wife has Clever chek voice, and I am using theAccu-Chek Aviva.

jayabee52 2012-05-17 05:20:14 -0500 Report

When I was married to my 2nd wife (now desceased) I had access to 2 meters from the same company right down to the exact same model. Those meters did not agree.

From that I had come to the conclusion that I had to use one meter for my readings and her meter for her readings. The most important thing IMO was not absolute dead-on accuracy, but instead how my own BG levels were trending. The same with her. That is why I kept the meters separate so the trends would be observable for each of us.

Bluegill88 2012-05-17 07:13:33 -0500 Report

Good point, I will keep that in mind. These communitation points are well needed. I have learn more just asking questions and reading what others have said about their condition. This is great, and I am glad that I can ask a question and get an answer real quick.
When I went to bed I took my bg, and got a reading of 118. Got up at 04:30 took my bg test and got 117. I say that is good. I wonder what will my Doctor say when she sees that all of my bg is in 110-120 range.

jayabee52 2012-05-18 08:01:38 -0500 Report

if you have had trouble with your Blood Glucose (BG) levels previously, Dr will undoubtedly be pleased. Then you can share with Dr how you found this resource in DC and share with him/her so perhaps Dr can share this resource with other people with diabetes. The more the merrier I say!

GabbyPA 2012-05-18 08:05:57 -0500 Report

I always try to share the site with my doctor and others. I have mixed results, but the more people know about it, at least when they are ready to give it a try, they will be aware. I personally think we are the best, but then, I am a bit prejudiced.

jayabee52 2012-05-18 08:11:06 -0500 Report

I try to share with DC people also. I also have mixed results. I also believe that DC is the best on the web for what we are all about.

As the western "sage" Will Sonnet said on TV: "No brag — just fact."

Bluegill88 2012-05-18 08:20:18 -0500 Report

Since I been onine with this group, I have learned more from members than my Doctor has told me about my diabetes. In fact I have never been told if I am boardline, Type 1, of Type 2. But after talking to everyone I am pretty sure where I will be placed, thanks to each of you at DC.

GabbyPA 2012-05-18 08:35:48 -0500 Report

It was the same for me. I had no doctor for the first 9 months of my diagnosis. So most of what I learned, I learned from these great folks! Now, when I see my doctor, I always have questions or something new to share with him. Sometimes it annoys him, but too bad. I am the one with diabetes, not him. And I am responsible for my treatment even more than he is.

jayabee52 2012-05-18 10:14:08 -0500 Report

The way it SHOULD work is you and Dr sit down and make this decision together.

Ultimately it is you who will administer the insulin so ultimately you have the control as to whether or not to continue to stay on insulin.

When I was put on insulin I was not consulted as I was in no shape to consent to insulin. I was in the Emergency room (ER) with a kidney shutdown (I was also put on dialysis) so I was just injected by the hospital staff until I was about to be discharged (about a month later). Then I was taught how to inject insulin and did so for about 4 years or so until I figured out that if I ate very carefully, I didn't need to inject insulin and could manage on what insulin my pancreas put out. Since Feb 2011 I haven't injected 1 unit of insulin into my body. It is both wonderful and scary at the same time. Wonderful I don't have to inject and worry about all that extra stuff needed to inject insulin. It is also scary in that should I overeat, as I sometimetimes do, I don't have the ability to inject insulin to counteract the higher Blood Glucose (BG) levels. I do have natural substances which to eat/drink which tend to bring my BG levels down, but they do not work as well or as surely as insulin might.

Bluegill88 2012-05-18 10:51:41 -0500 Report

I really appreciate your input on this subject. Now I know how I will plead my case. I will show her (Doctor) my results for the pass thirty days; My meal plan (witch I got from you), My meter reading. and my diet plan that I will be following. I keep you posted on my out come.