RIPA (Ristocetin Induced Platelet Aggregation)
Indications | Further differentiate Type 2 VWD, specifically to confirm Type 2B VWD |
Method | Platelet Aggregation |
Test Information | Platelets are agglutinated in vitro by adding 3 concentrations (1.5, 1.0 or 0.5 mg/mL) of ristocetin to platelet rich plasma which is stirred continually. The process is measured spectrophotometrically and the rate and degree of aggregation (clearing of the turbid solution) is plotted by a recorder. |
Sample Requirements | Appointment required. It will be drawn at Bloodworks Northwest. Call Hemostasis Lab at 206-689-6594 to schedule an appointment. |
Requisition Form | RFT- Hemostasis Reference Laboratory |
Transaction Code | 3240-04 |
CPT Codes | 85576 x3 |
Test Schedule | Monday – Friday |
Turn around Time (analytic time) | Same day as scheduled visit |
Report/Results | Fax number required to receive report |