Expired Test Strips - Page 2

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Expired Test Strips - Page 2


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Old 02-04-2018, 16:31   #11
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looks like someone actually did a study on the expired test strips....
https://diabeticfaq.com/diabetic-test-strips-expire/


A company named Glucomart performed some tests to help answer these questions. The design and results of their study are shown below.

Design

They used test strips from different manufacturers that had been expired for 1, 2, 3, 4, or 5 years.The expired strips were compared with the same brand unexpired strips.Three control solutions were used: normal, high, and low concentration glucose solutions.Test trips were tested three times in each control solution.Statistics were used to test the accuracy of each strip.The brands tested included:Accu-Check Aviva PlusAccu-Check CompactAdvocateBayer Breeze 2Bayer ContourBayer Contour NextElementEmbraceFreeStyleFreeStyle InsulinxFreeStyle LiteLibertyNova MaxOne Precision XtraOne Touch UltraOne Touch Ultra BlueTrueBalanceTrueTest

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Old 02-04-2018, 16:35   #12
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Notes of caution

You should always use discretion if using expired test strips.This was a small study, and a larger-scale trial might give different results.If you are planning to use expired strips, always use control solutions and test for accuracy before use.Test strips in open vials should not be used after 6 months.If you think that your strips are inaccurate do not use them. Contact your physician or the test strip manufacturer for advice.It is possible that your manufacturer will replace your expired test strips.

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Old 02-04-2018, 16:42   #13
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I think someone else said it before me, but I wouldnt use expired strips to determine your next dose of fast acting insulin. not ever


but if you have stable blood glucose levels....well....the inacuracy wont kill you. but if it was a loved one that was asking you what they should do.....wouldn't you recommend that they get new strips and find another place to save money?

that is my advice when someone asks me about winter tires...ie find another way to save money.

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Old 02-04-2018, 18:20   #14
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Quote:
Originally Posted by NSDad126 View Post
wouldn't you recommend that they get new strips and find another place to save money?

that is my advice when someone asks me about winter tires...ie find another way to save money.
Preach, brother! I'm always amazed at how people in serious northern climates will drop 30-40 large (or more) on a new vehicle and not give it appropriate winter footwear.

Interesting article; one that I'm sure helps some folks. Me, I guess I just don't like living that close to the edge. I'll stick with new strips.

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Old 02-04-2018, 18:59   #15
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One of the pluses of using expired test strips is...when they're gone...you have to buy new ones.

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Old 02-05-2018, 00:01   #16
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I have always wondered about this. I know some expired meds are even good 10-15 years after the expiration date. My doctor even told me this.

I think it would depend mostly on how expired they are? One year vs. five years perhaps!

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Old 02-05-2018, 00:40   #17
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from an electronics point of view, the blood has to come in contact with an electrical surface on the test strip for the meter to work its magic. without even knowing what that surface is, we can generalize that it is a conductive material which is likely suseptical to oxidization. so one might conclude that an oxidized test strip is not accurate.
You'd think that, but no, that's not quite how it works. The blood never touches the contacts. The contacts on the test strip are gold-plated copper as are the contacts of the meter.

When the test strip is inserted into the meter...the meter reads what should be a known resistance factor and activates a go-code that tells you on the screen that test is good to go.

Most glucometers today use an electrochemical method. Test strips contain a capillary that sucks up a reproducible amount of blood. The glucose in the blood reacts with an enzyme electrode containing glucose oxidase (or dehydrogenase). The enzyme is reoxidized with an excess of a mediator reagent, such as a ferricyanide ion, a ferrocene derivative or osmium bipyridyl complex. The mediator in turn is reoxidized by reaction at the electrode, which generates an electric current. The total charge passing through the electrode is proportional to the amount of glucose in the blood that has reacted with the enzyme.

The meter then calculates that current, turns it into a whole blood value...then converts it to a plasma value which is then displayed on the meter screen.

More than likely...that meter has more computing power to it than the on-board Apollo 11 had when it went to the moon.

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Old 02-05-2018, 00:43   #18
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side note for anyone with a bit of a prepper mind: there are some antibiotics that you can keep for long time, others become toxic as they break down. please do your homework, don't assume that everything is safe.

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