Platelet Aggregation (low dose ristocetin for von Willebrand disease)

Specimen Container	Sodium Citrate Tube
Specimen Requirement	Citrated Whole Blood 10 mL of blood. Fill blood up to the marking on tube and mix well. Patient to fast overnight prior to test and should not be on anti-platelet medication for at least 2 weeks for investigation of bleeding disorder
Specimen Storage/Transport	Send immediately at room temperature. DO NOT send with ice pack.
Orderable as Urgent?	No
Turn Around Time	1 day
Testing Laboratory Location	SGH
Laboratory	Haematology
Contact Number	6326 6022
Day and Time Performed	By appointment only Monday - Friday
Orderable on CPOE?	Yes
Downtime Form	63170-Form-1080 Haematology Laboratory Downtime Form
Additional Information	New platelet aggregation test using low dose ristocetin for confirmation of Type 2B von Willebrand disease. All platelet aggregation tests are by appointment only, please contact SGH Haematology laboratory 6326 6022.

Change History Notes

Last Updated - 05 Apr 2025