84
Testing blood glucose3
12 Take the AST cap and press it against the puncture
site. The pin-hole opening on the AST cap must be
in the same position on the skin as during punc-
ture. This ensures that a proper drop of blood can
form and prevents the AST cap from coming into
contact with the blood.
You can watch the drop of blood form through the top
of the AST cap. The drop of blood should be approxi-
mately this size:
. If the drop is smaller, release the
pressure for a few seconds, without removing the AST
cap from the puncture site. Then re-apply pressure on
the AST cap until you get a sufciently large drop of
blood.
Too much blood emerging can contaminate the
AST cap. For hygienic reasons, the AST cap and
the front surface of the lancet drum should be
cleaned immediately after testing your blood
glucose (see chapter 11.2). Also, dried blood on
the lancing device could prevent it from func-
tioning properly.
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