Test Directory
Ristocetin Induced Platelet Aggregation (RIPA)
Containers - Adult
Green Cap Tube 3.0ml (Sarstedt)
|
Volume Range
3.0ml
Additive per Container
Sodium Citrate |
Containers - Child
|
1.4ml citrate sarstedt monovette tube
|
Volume Range
Additive per Container
Sodium Citrate |
Reference ranges
A normal response is:
|
Ristocetin Concentration (mg/mL)
|
Aggregation (%)
|
|
1.5
|
>50
|
|
1.0
|
>50
|
|
0.75
|
<20
|
|
0.5
|
<20
|
Laboratory Site
Old Dalkeith Road
Edinburgh
EH16 4SA
Transport arrangements
Specimen must be transported within a plastic sealable bag or other suitable container. This assay must be carried out within 2hours of collection.
Sample storage arrangements
Room Temperature
Special instructions for collection
Coagulation samples (green top) MUST be filled to the green line indicated on the tube
How to request
Must be discussed and arranged with Haematology medical staff.
Availability
Test not available during restricted service.
Anticipated turnaround
7 days
What happens if the result is positive or abnormal
The laboratory will telephone abnormal results where it appears that these are likely to be clinically significant. Please provide telephone/ bleep number.
General additional information
The range of drugs known to affect platelet aggreggation responses is wide. Asprin, in particular, will affect the results. The patient should not have taken any aspirin containing medication at least 10days prior to testing. Where patients have low platelet counts, it can be difficult to obtain meaningful aggregation results.