Extremes in hematocrit (the amount of red blood cells in the blood) can affect test results. Very high hemat- ocrits (above 60%) and very low hematocrits (below 25%) can cause false results.1
Abnormally high levels of Vitamin C or other reducing substances will cause false low blood glucose results.2 Normal levels of reducing substances have little effect on blood glucose results.
Do not use blood samples with preservatives that contain fluoride
When testing, removal of the test strip prior to display of the blood glucose result may give you a false result.
Infection Control
Use universal blood precautions. All patient samples and materials with which they come in contact are considered biohazards and should be handled as if capable of transmitting infection.
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