Test/Investigation
Von Willebrand screen (includes VWF Antigen, VWF Activity)
Site(s) or Laboratory offering Test/Investigation
NNUH
Indications
Investitagion of haemostasis and prolonged aPTT
Comments/Precautions
Urgent requests should be discussed with duty haematology consultant. Sample should be filled to the mark in the tube. Under or overfilled samples will be rejected. Please provide details of anticoagulants, if patient is on any.
Ideal sample age for accurate results/Maximum acceptable sample age (at the time of analysis)
4 hours; Max 8 hours
Sample type
Citrate x2
Turnaround times (TAT) Urgent/Routine/GP or OPD
24 hours for in-patient samples; Otherwise, samples are run in weekly batches.
Reference intervals (adult unless stated)
Advisory comments, age, sex and analyser specific reference intervals are included on the laboratory report where appropriate. Further advice can be obtained by contacting the laboratory.
If UKAS Accredited Test indicate at which site
Yes: NNUH