27
Venous Blood Testing (For Professional Use Only)
For fresh whole venous blood specimens, insert a new test strip into the
meter and allow it to proceed to the specimen application icon on the display.
Collect the venous blood using a butterfly collection set into a 3 ml syringe
with no anticoagulants. Remove the syringe from the butterfly tubing and
allow 4 drops to fall onto a clean gauze pad to be discarded. Apply a small
hanging drop (15 µL) from the syringe tip to the specimen application area of
the test strip. The blood drop should cover the bottom of the specimen well
entirely. Specimens must be run within 15 seconds after collection to obtain
an accurate INR reading.
