OneTouch ULTRASMART Manual page 54

While at the lab:
• Make sure that the meter test and the lab test are
performed within 15 minutes of each other.
• Wash your hands before obtaining a blood sample.
• Use only fresh capillary blood.
You may still have a variation between the results because
blood glucose levels can change significantly over short periods,
especially if you have recently eaten, exercised, taken
medication, or experienced stress.
eaten recently, the blood glucose level from a fingerstick can be
up to 3.9 mmol/L higher than blood drawn from a vein (venous
sample) used for a lab test.
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
1. Surwit, R.S., and Feinglos, M.N.: Diabetes Forecast (1988), April, 49–51.
2. 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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In addition, if you have
2
Therefore, it is best to fast for eight
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