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COMPARING THE InDuo
TM
METER AND LABORATORY RESULTS 59
• Never use your InDuo
TM
meter with
blood that has been collected in a
grey-top blood collection tube.
• Use fresh capillary blood only.
Other reasons for variation
Besides the factors listed in the
OneTouch
®
Ultra test strip package insert
there are other reasons for variations:
• Blood glucose levels can change
significantly over short periods,
especially if you have recently eaten,
exercised, taken medication, or
experienced stress.
1
• If you have eaten recently, the blood
glucose level from a fingertip blood
sample can be up to 70 mg/dL higher
than blood drawn from a vein
(venous sample) used for a laboratory
test. It is therefore best to fast for 8
hours before doing a comparison test
between an InDuo
TM
meter result and
a laboratory result.
2
• Physical factors, such as the amount
of red blood cells in the blood (a high
or low hematocrit) or the loss of
body fluids (severe dehydration) may
also cause an InDuo
TM
meter test
result to be different from a
laboratory result.
References
1. Surwitt RS, Feinglos, MN. Diabetes
Forecast. April, 1988: 49–51.
2. Sacks DB. Carbohydrates. Burtis CA,
Ashwood BR ed. Tietz Textbook of Clinical
Chemistry. Philadelphia, PA: W.B. Saunders
Company; 1994: 959.
DCO_06084101C_InDuo_OB_US 8/16/04 1:08 PM Page 59