Aspirin Platelet Function Test
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Automated platelet induced aggregation.
Aid in the detection of platelet inhibition due to aspirin therapy.
Test results are reported in Aspirin Reaction Units (ARU). Therapeutic range for effective platelet inhibition for patients on an aspirin regimen is 350-549 ARU. Values of 550-700 ARU are seen in patients not on aspirin therapy or where therapy is not effectively inhibiting platelet function.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Collect specimen in a 2.7 mL blue top (citrate 3.2%) tube using a 21 gauge or larger needle;[bold] do not use 1.8 mL tube[/bold]. Mix by inversion. Do not centrifuge. Whole blood specimen should arrive at lab within 3 hours of collection; transport at room temperature. Collection of the blood through lines that have been previously flushed with heparin should be avoided. If the blood must be drawn through a VAD (vascular access device), the line should be flushed with 5 mL of saline and the first 5 mL of blood or six dead space volumes of the VAD discarded.