Owner`s manual
26
You may still have a variation from the result because blood
glucose levels can vary signicantly over short periods of
time, especially if you have recently eaten, exercised, tak-
en medication, or experienced stress
1
. In addition, if you
have eaten recently, the blood glucose level from a nger
prick can be up to 70mg/dL (3.9 mmol/L) higher than blood
drawn from a vein (venous sample ) used for a lab test².
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 uid (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.