OneTouch® Ultra®2 – Comparing Meter and Laboratory Results
OT-Ultra2-Comparing-Meter-and-Laboratory-Results
Comparing results from the OneTouch® Ultra® 2 meter to lab results.
Product Guide
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OneTouch® Ultra®2 meter
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Comparing Meter And Laboratory Results:
Test results with the OneTouch® Ultra® 2 Meter are plasma-calibrated. This helps you and your health care professional to compare your meter results with laboratory tests. If you have been using another type of meter—one that provides whole blood-calibrated results—you may notice that your test results with the OneTouch® Ultra® 2 Meter are approximately 12% higher.
OneTouch® Ultra® 2 Meter test results and laboratory test results both are expressed in plasma-equivalent units. However, your meter result may differ from your laboratory result due to normal variation. Meter results can be affected by factors and conditions that do not affect laboratory results in the same way.
Your OneTouch® Ultra® 2 Meter glucose value is considered accurate when it is within ±20% of the laboratory measurement. There are some specific situations that could cause a difference of more than ±20%:
You have eaten recently. The blood glucose level from blood obtained from a fingertip can be up to 70 mg/dL higher than blood drawn from a vein (venous sample) used for a lab test.1
1Sacks, D.B.: “Carbohydrates.” Burtis, C.A., and Ashwood, E.R. (ed.), Tietz Textbook of Clinical Chemistry. Philadelphia: W.B. Saunders Company (1994), 959.
Your hematocrit (percentage of your blood that is red blood cells) is high (above 55%) or low (below 30%).
You are severely dehydrated.
You tested at a temperature near the low end of the operating range (43°F) and you get a high glucose result (i.e., greater than 180 mg/dL). In this situation, repeat the test in a warmer environment with a new test strip as soon as possible.
For accuracy and precision data and for important information on limitations, see the insert that comes with your test strips.
To maximize your chances of an accurate comparison between meter and laboratory results, follow a few basic guidelines:
Before going to the lab:
Perform a control solution test to make sure the meter is working properly.
Do Not eat for at least eight hours before you test your blood.
Take your meter with you to the lab.
While at the lab:
Conduct your meter test within 15 minutes of the lab test.
Use only fresh, capillary blood obtained from the fingertip.
Follow all instructions for performing a blood glucose test with your meter.
