glucose level from a fingerstick can be
up to 70 mg/dL higher than blood
drawn from a vein (venous sample)
used for a lab test.
8
Therefore it is best
to fast for four to 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 dehy-
dration) may also give a meter result
different from a laboratory result.
References
1. LifeScan data on file.
2. LifeScan data on file.
3. Kahn, R., and Weir, G.:
Joslin’s Diabetes Mellitus,
13th ed. Philadelphia: Lea and Febiger (1994), 489.
4. Krall, L.P., and Beaser, R.S.:
Joslin Diabetes
Manual.
Philadelphia: Lea and Febiger (1989),
261–263.
5. American Diabetes Association position statement
on the Diabetes Control and Complications
Trial (1993).
6. Clarke, W.L., et al.:
Diabetes Care,
Vol. 10, No. 5
(1987), 622–628.
7. Surwit, R.S., and Feinglos, M.N.:
Diabetes Forecast
(1988), April, 49–51.
8. Sacks, D.B.: “Carbohydrates.” Burtis, C.A., and
Ashwood, E.R. (ed.),
Tietz Textbook of Clinical
Chemistry.
Philadelphia: W.B. Saunders Company
(1994), 959.
64
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