Laboratory Medicine

Test Directory / Ristocetin Induced Platelet Aggregation

Ristocetin Induced Platelet Aggregation

Citrated Plasma

Test	Ristocetin Induced Platelet Aggregation
Common Abbreviations	RIPA
Profile
Clinical Indication	Ristocetin induced aggregation is a platelet funtion test that is used to screen for and sub-type Von Willebrands disease. Only performed after initial investigations of vWD
Specimen Type	Blood
Sample Type	Citrated Plasma
Minimum Volume	1 x 3mL (adult) 1 x 1mL (paed)
Special Precautions	Please discuss with Consultant Haematologists in the first instance. Must be prearranged with Haemophilia Nurse prior to appointment and samples taken. Hand delivery to the Coagulation Lab before 10am
Stability	4 hrs (unspun)
Turnaround Time	2-3 days
Laboratory	SLM Haematology Laboratory Leeds St James University Hospital
Reference Interval	Issued with final report
Limitations	Samples must not be sent by air tube. Samples must be processed within 6 hours of collection
Additional Information

Update for visitors

Visiting restrictions are in place at our hospitals to stop the spread of norovirus. These restrictions will be in place until further notice.

The following wards are closed to visitors:

York Hospital: Ward 29 and Ward 37.

There are four exceptions only to the restrictions. These are:

For patients who are receiving end of life care

Paediatric patients (babies and children)

Maternity care

The family carers of those with dementia

We understand these restrictions can be difficult when a loved one is unwell. The restrictions will be reviewed daily and lifted as soon as it is safe. Thank you for your understanding as we try to reduce the spread of norovirus in our hospitals.