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Platelet Aggregation
MessagePerformed in the Hematology Laboratory x5475, 76.
Sample MUST be drawn to minimum fill line on tube. Do not collect on ice.
Sample MUST be drawn to minimum fill line on tube. Do not collect on ice.
Test Code
PLTAG
CPT Codes
85576
Includes
agonists used: ADP, epinephrine, collagen, standard dose ristocetin and arachadonic acid.
Preferred Specimen
Whole Blood
Minimum Volume
4, 2.7 mL sodium citrate tubes. Sample MUST be drawn to minimum fill line on the tube or the sample will be rejected as QNS. Do NOT collect on ice.
Instructions
Do not place the specimen on ice (platelets undergo spontaneous aggregation is stored in the cold).
Transport Container
4, Light Blue Top (Sodium Citrate), 1.8 or 2.7 mL draw
Transport Temperature
Room Temperature
Specimen Stability
Room Temperature: 3 hours
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis, lipemia, QNS, clotted.
Patient's with platelet counts less than 100,000/µl will be rejected.
Patient's with platelet counts less than 100,000/µl will be rejected.
Methodology
aggregometry/light transmittance
Setup Schedule
M-F 8:30am- 3pm
Limitations
Platelet aggregation should not be performed on any patient who has ingested aspirin, aspirin-containing compounds, or any platelet function inhibitor within eight days prior to the test.
Reference Range
ADP, Epinephrine, Collagen, Ristocetin, Arachidonic Acid: 60- 100%
Clinical Significance
To identify congenital or acquired platelet aggregation defects. Platelet count should be > 100,000/µl
