Alternative Site Testing (AST)
You have the option of testing other places on your body besides the fingertip. Blood
obtained from a fingertip or palm can be used at any time to measure blood glucose.
The two palm testing sites are the fleshy areas under the thumb (thenar) and under
the little finger (hypothenar). If blood from an alternative site such as the forearm,
upper arm, thigh or calf is used, there are certain times when testing is not
appropriate (see next page). This is because your glucose level changes quicker in
your fingertip or palm than in the alternative sites. These differences may cause you
to make the wrong therapeutic decision produc ing adverse health effects. Please
read the following section before you try testing from other places.
19
Hypothenar
Thenar
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