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Test Code RIPA Ristocetin-Induced Platelet Aggregation

Important Note

Prior appointment is required. Please call Haematology at 67725320 for appointment.

Patient should be fasting for this test.

Specimen Requirements

Specimen Type: Whole Blood
Container/Tube: 2 Light Blue Top (3.2% Sodium Citrate)
Volume: 2 × 2.7mL Whole Blood (Tubes must be full)
Collection Instructions:

Please call Haematology to arrange for the collection of blood samples.

Reference Interval

Normal platelet agglutination response to high dose ristocetin
Absent platelet agglutination response to low dose ristocetin

Days and Times Performed

First Thursday of the month, TAT 3 working days

Methodology

Platelet Aggregometry

Service Code

12437

Update

Last updated 18/03/2016

Unacceptable Condition

Haemolysis Reject
Icterus Reject
Lipaemic Reject
Others Clotted or insufficient reject

 

Specimen Stability

**Preferred temperatures for storage prior to and during shipping to NUH**

Fresh specimen required

 

Specimen Type Whole Blood
Ambient 1 hour
Refrigerate NA
Frozen NA

 

Testing Laboratory

National University Hospital

Haematology, 67725320

Useful For

Aids in the diagnosis of variant von Willebrand’s Disease (especially Type 2 VWD).

Profile Information

Includes the following agonists:

  • High Dose Ristocetin
  • Low Dose Ristocetin

Alias

RIPA

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