Test directory: Platelet VerifyNow, Aspirin

Ordering Code6209
Test NamePlatelet VerifyNow, Aspirin
AliasVerifyNow Aspirin
Platelet Function, Aspirin
Preferred SpecimenVenous Whole Blood
Preferred ContainerGreiner Bio-One Vacuette 2.0 mL partial fill w/3.2% sodium citrate
Optimum Volume2 Tubes
Collection InstructionsLab Draw Only
Drawn only at QMC or QMC DLS POB III
Use 21 gauge or larger needle
Use discard tube (Citrate or Plain no activator).
Handling InstructionsDo NOT centrifuge specimen
Do NOT refrigerate or freeze
Keep at room temperature.
Transport RequirementsOahu: Ambient
Do not transport by PTS.
Hand delivered only.
No agitation.
Specimen StabilityAmbient: 4 Hours
Refrigerated: Not Stable
Frozen: Not Stable
Rejection CriteriaClotted, Contaminated, Frozen, Hemolyzed, Over filled tube,
Refrigerated, Specimen older than stability limits, Under filled tube
Do NOT accept floor or nurse draws.
Avail. StatPatients of the testing hospital only
Analytic Time2 Hours
MethodologyPlatelet aggregation

Reference range(s)

ComponentAgeMale NormMale Critical LowMale Critical HighFemale NormFemale Critical HighFemale Critical LowUnitsAdd'l info
Platelet VerifyNow, AspirinALLARU

Test ...

Test results are reported in Aspirin Reaction Units (ARU).
 350-549 ARU: Therapeutic range for platelet function.
 550-700 ARU: NON-therapeutic range for platelet function.
Note: Aspirin Reaction Units (ARU) indicate the amount of
      thromboxane A2-mediated activation of GPIIb/IIIa
      receptors involved in platelet aggregation. ARU is
      calculated as a function of the rate and extent of
      platelet aggregation. Expected values are in the
      range of 350-700 ARU. The cut-off to determine if
      a patient is receiving the therapeutic benefit of
      aspirin is 550.
      Certain conditions may affect test results, such
      as exposure to GPIIb/IIIa inhibitors (48 hours
      for Integrillin and 10 days for ReoPro) or improper
      sample collection (platelet activation).
      VerifyNow Aspirin Test results should always be
      interpreted in conjunction with other clinical
      and laboratory data available to the clinician.

See report.