Lifescan Ultra 2 - Manual (Page 66)

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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 healthcare 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
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.
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