Comparing Meter And Laboratory Results - Medaval MONOMETER VOICE Gebrauchsanleitung

COMPARING METER AND LABORATORY RESULTS

Test results from the meter and laboratory are both expressed in
plasma-equivalent units. However, the result you obtain from your
meter may differ somewhat 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. (See test strip pa-
ckage insert for typical accuracy and precision data, and for important
information on Limitations.) To make an accurate comparison between
meter and laboratory results, follow the guide-lines below.
Before you go to the lab:
Perform a control solution test to make sure that the meter is working
properly.
It is best to fast for at least eight hours before doing comparison
tests.
Take your meter with you to the lab.
While at the lab:
Make sure that the samples for both tests (the meter test and the lab
test are taken and tested within 15 minutes of each other).
Wash your hands before obtaining a blood sample.
Never use your meter with blood that has been collected in a gray-
top test tube.
Use fresh capillary blood only.
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You may still have a variation from the result because blood glucose
levels can change significantly over short periods, especially if you
have recently eaten, exercised, taken medication, or experienced
*6
stress In addition, if you have eaten recently, the blood glucose le-
vel from a finger stick can be up to 70 mg/dL(3.9 mmol/L) higher than
blood drawn from a vein (venous sample) used for a lab test
Therefore, it is best to fast for eight hours before doing comparison
tests. Factors such as the amount of red blood cells in the blood (a
high or low hematocrit) or the loss of body fluid (severe dehydration)
may also cause a meter result to be different from a laboratory result.
References
*6: Surwit, R.S., and Feinglos, M.N.: Diabetes Forecast (1988), April,
49-51.
*7: Sacks, D.B.:"Carbohydrates. "Burtis, C.A.,and Ashwood, E.R.( ed.),
Tietz Textbook of Clinical Chemistry. Philadelphia: W.B. Saunders
Company (1994), 959.
*7 .
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