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Platelet Aggregation, Risto

eDH Procedure Code(s)

LAB3207 Platelet Aggregation, Ristocetin (DHMC)

Order Questions

LAB3207 Platelet Aggregation, Ristocetin (DHMC)
  • Clinical History:
  • Patient on Aspirin?
  • Patient on NSAIDs?
  • Patient on Antiplatelet drug?

Collection Information

Contact the Coag lab before drawing: 5-8604
Collect THREE 2.7 mL Sodium Citrate tube filled to the line
Blue top tubes must be filled within 10% of stated volume. A discard tube must be used if a citrate tube is to be drawn using a winged blood collection set. It is important to remove air from the blood collection set to ensure the proper blood volume is obtained in the coag tube.

If the patient has a known hematocrit >55%, please contact the coagulation lab for an adjusted collection tube before drawing the blood. Platelet Aggregations cannot be transported. Patient must be present at DH-Lebanon campus. DO NOT send through pneumatic tube system. Samples must be hand delivered, contact the Coag lab for pickup. Do not centrifuge. Platelet Aggregations must be scheduled in advance. Contact the Hemophilia Center Secretary 603-650-6763 Results will be summarized in a Pathologist interpretive report.

Specimen Information

Specimen Type Specimen Source Acceptable Containers Minimum Test Volume (mL)
Blood Blood, Venous BluCit-A 6.0

Shipping and Handling

Processing Instructions: N/A

Transport Temperature: N/A
Transport Instructions: Platelet Aggregations cannot be transported. Patient must be present at DH-Lebanon campus.

Specimen Stability Unprocessed
Unprocessed: 4 hours

Specimen Stability Post Processing
Ambient: 4 hours
Refrigerate: N/A
Frozen: N/A

Test Components

Component LOINC Code
RISTOCETIN 0.5 MG/ML AGGLUTINATION 93410-9
RISTOCETIN 1.25 MG/ML AGGLUTINATION 78528-7

Turnaround Time (TAT)

STAT 1 Hour
Routine 4 Hours

CPT Code(s)

85576

Performing Lab Section

Coagulation

Performing Lab(s)

Dartmouth Hitchcock Medical Center Laboratory (MHMH)