26
TROUBLESHOOTING AND DETAILED INFORMATION ABOUT YOUR SYSTEM
Detailed information about your system
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 3.9 mmol/L higher than blood drawn from
a vein (venous sample) used for a lab test.
1
• Your haematocrit (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 (6°C) and you get a high glucose result (i.e., greater than 10 mmol/L).
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.
1. Sacks, D.B.: “Carbohydrates.” Burtis, C.A., and Ashwood, E.R. (ed.),
Tietz Textbook of Clinical Chemistry
. Philadelphia: W.B. Saunders Company (1994), 959.
To maximise 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 in this User Guide for performing a blood glucose test with your meter.
Message
What it means
What to do
No result in memory, such as the first time use
of the meter
or,
your meter was unable to recall this result.
This result will not be included in result
averages.
You can still perform a blood glucose test
and get an accurate result. Contact LifeScan
Customer Care on Freephone 0800 121 200
(UK) or 1800 535 676 (Ireland) to report this
occurrence,
unless
this is your first use of the
meter.
Your meter was unable to recall this result.
This result will not be included in result
averages.
You can still perform a blood glucose test and
get an accurate result, but contact LifeScan
Customer Care on Freephone 0800 121 200
(UK) or 1800 535 676 (Ireland) to report this
occurrence.
