Fora GTel Manual Del Propietário página 49


Take your meter with you to the lab.
While staying at the lab:
Make sure that the samples for both tests 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 or venous blood only.
You may still have a variation from the result because blood glucose
levels can change significantly over short periods of time, especially if
you have recently eaten, exercised, taken medication or experienced
stress* . In addition, if you have eaten recently, the blood glucose level
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from a finger prick 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 (dehydration) may also cause
a meter result to be different from a laboratory result.
* : Surwit, R.S., and Feinglos, M.N.: Diabetes Forecast (1988), April, 49-51.
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* : Sacks, D.B.: "Carbohydrates. " Burtis, C.A., and Ashwood, E.R.( ed.), Tietz
4
Textbook of Clinical Chemistry. Philadelphia: W.B. Saunders Company (1994),
959.
.
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