Feedback
Ristocetin-Induced Platelet Aggregation
2003382
Ordering Recommendation

Not an initial test in the diagnosis of von Willebrand disease (vWD). Order in consultation with a coagulation specialist to distinguish between type 2 subtypes in patients diagnosed with vWD.

Mnemonic
RIPA
Methodology
Qualitative Aggregation
Performed
Tue
Reported
1-2 days
New York DOH Approval Status
Specimens from New York clients will be sent out to a New York DOH approved laboratory, if possible.
Time SensitiveTime Sensitive
UUHSC Testing OnlyUUHSC Testing Only
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
Prior to patient preparation, refer to Remarks section. Patient must fast from midnight until specimen is collected.
Outpatient: Send patient to ARUP Family Health Clinic (500 Chipeta Way, Salt Lake City, UT) for specimen collection.
UUHSC Inpatient: Contact the Hemostasis/Thrombosis lab at (801) 583-2787 ext. 2151 to schedule collection. 
Collect
Light Blue (Sodium Citrate) AND Lavender (EDTA) or Pink (K2EDTA). 
Specimen Preparation
Transport 14 mL whole blood (Sodium Citrate) AND 4 mL whole blood (EDTA). (Min: 14 mL Sodium Citrate AND 4 mL EDTA) Specimen must be received in the performing laboratory within one hour of draw. 
Storage/Transport Temperature
CRITICAL ROOM TEMPERATURE. 
Unacceptable Conditions
Specimens not collected by ARUP. 
Remarks
A completed Patient History Form must be submitted to Coagulation811@aruplab.com and approved prior to specimen collection. The Patient History Form is available on the ARUP Web site or by contacting ARUP Client Services at (800) 522-2787. 
Stability
Ambient: 1 hour; Refrigerated: Unacceptable; Frozen: Unacceptable 
Reference Interval
Effective April 18, 2011
Ristocetin-Induced Platelet Aggregation High DoseNormal
Ristocetin-Induced Platelet Aggregation Low DoseNormal

Interpretive Data


Note
Hotline History
N/A
Components
Component Test Code*Component Chart NameLOINC
2003383Ristocetin-Induced PlateletAgg High Dose55799-1
2003384Ristocetin-Induced Platelet Agg Low Dose55801-5
2003385Ristocetin-Induced Platelet Agg Interp
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • RIPA