Ristocetin Induced Platelet Aggregation
Orderable EAP code:
Billable EAP Codes:
CPT Codes:
Lab Section:
Turnaround Time:
1 day
Test Schedule:
Specimen must be collected at OHSU PPV or DCH by appointment only. Schedule with Lab Client Services 503-494-7383. Schedule appointments Tuesday only from 9:00 to 12:00, at least 1 hour apart and no more than 3 per day.
Specimen Requirements:
Patients should refrain from non-steroidal anti-inflammatory drugs, aspirin and aspirin containing products, (unless the patient is being checked for aspirin resistance) or dietary supplements known to affect platelet function 10-14 days prior to testing.
Two FULL 2.7 mL whole blood LIGHT BLUE (3.2% sodium citrate) tubes and one 3 mL whole blood LAVENDER (EDTA). Do NOT send in pneumatic tube system. Do NOT spin.
Stability is 3 hours at Room Temperature.
Sample must be received in SIC Lab within 1 hour of the draw.
Pediatric Specimen Requirements:
Patients should refrain from non-steroidal anti-inflammatory drugs, aspirin and aspirin containing products, (unless the patient is being checked for aspirin resistance) or dietary supplements known to affect platelet function 10-14 days prior to testing.
Two FULL 2.7 mL whole blood LIGHT BLUE (3.2% sodium citrate) tubes and one 3 mL whole blood LAVENDER (EDTA). Do NOT send in pneumatic tube system. Do NOT spin.
Stability is 3 hours at Room Temperature.
Sample must be received in SIC Lab within 1 hour of the draw.
For pediatric patients requiring multiple coagulation tests, please call 503-494-7383 regarding draw volumes.
Reference Range:
Ristocetin Aggregation (0.25mg/mL) less than 5 Ohms
Ristocetin Aggregation (1.0mg/mL) greater than 5 Ohms
Comments:
Used for the detection of Von Willebrand Disease, Bernard Soulier, and Type 2B or Platelet-type vW disease.
Synonyms:
RIPA