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Ristocetin Induced 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
RIPA
CPT Codes
85576
Includes
Platelet aggregation with ADP, Epinephrine, Collagen, low dose Ristocetin, and Arachadonic acid
Preferred Specimen
plasma
Minimum Volume
4, 2.7 mL sodium citrate tubes. Sample MUST be drawn to the minimum fill line on the tube or the sample will be rejected as QNS.
Instructions
4, 2.7 mL sodium citrate tubes. Do not place the specimen on ice.
Transport Container
4, Light Blue Top (Sodium Citrate), 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, platelet counts less then 100,000/µl, if the specimen is on ice, if the specimen is spun in a centrifuge.
Methodology
aggregometry/light transmittance
Setup Schedule
M-F 8am- 3pm
Limitations
Hemolysis, Lipemia, Platelet counts, the specimen may not be on ice or spun down.
Reference Range
See Report
Clinical Significance
To identify Type II b VWD
