14
Blood Glucose Tests
2
Performing a Blood Glucose Test with Blood from Your Palm, Forearm,
or Upper Arm (Alternative Site Testing)
w WARNING
Risk of a serious health incident
Your blood glucose level changes faster in your fingertip and palm than in the
forearm and upper arm. Performing a blood glucose test with blood from the
forearm or upper arm may cause you to misinterpret your actual blood glucose
level, leading to improper therapy.
• Do not use alternative site testing (AST) to calibrate a continuous glucose
monitoring system.
• Do not use alternative site testing to make insulin dosing calculations.
• Alternative site testing should be done only during steady-state times (when
glucose is not changing rapidly).
You have the option of obtaining a blood sample from other sites on your body besides
the fingertip. Alternative sites include the palm, forearm, and upper arm.
Blood obtained from the fingertip and palm can be used at any time to perform a
blood glucose test.
If blood from the forearm or upper arm is used, there are certain times when testing is
not appropriate. Read the following section before you try testing from the forearm or
upper arm.
a forearm or
upper arm test
• immediately before a meal.
• while fasting.
perform a forearm
or upper arm test
• up to 2 hours following a meal, when blood glucose values
can rise quickly.
• after injecting bolus insulin, when blood glucose values can
decrease rapidly.
• after exercise.
• if you are sick.
• if you think your blood glucose is low (hypoglycemia).
• if you sometimes do not notice when your blood glucose is
low.
If you are interested in AST, talk to your healthcare professional first.
To obtain an AST cap and detailed AST instructions, contact Roche.
83715_09767959061A.indd 1483715_09767959061A.indd 14 6/29/2021 11:30:32 AM6/29/2021 11:30:32 AM
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