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Coagulation factor assays

Here is a list of the coagulation factor assays carried out by the Haematology department, together with specimen requirements and the estimated time it will take to produce a result.

The results availability times given here represent the time generally required to produce a result following receipt of the sample in the laboratory. Sample transport times are not included.

Where appropriate, if a result is required the same day samples must be received sufficiently early to allow completion of the test. Contact the lab if the test you require is not listed.

These tests are available during the normal working day. See a list of haematology tests available outside core working hours.

From April 6th we will be using the Sarstedt blood tube system - see the colour coded conversion chart.


Test Specimen requirements Urgent results available (from time of receipt in lab) Non-urgent results available (from time of receipt in lab) Reports available
Factor II assay Blue cap vacutainer [1.3ml, 2ml or 5ml paediatric bottle] 3 hr

< 10 days

< 10 days

Factor V assay Blue cap vacutainer [1.3ml, 2ml or 5ml paediatric bottle]

3 hr

< 10 days

<10 days

Factor VII assay Blue cap vacutainer [1.3ml, 2ml or 5ml paediatric bottle]

3 hr

< 10 days

< 10 days

Factor VIII assay Blue cap vacutainer [1.3ml, 2ml or 5ml paediatric bottle]

3 hr

< 5 days

< 5 days

Factor IX assay

Blue cap vacutainer [1.3ml, 2ml or 5ml paediatric bottle]

3 hr

< 5 days

< 5 days

Factor X assay Blue cap vacutainer [1.3ml, 2ml or 5ml paediatric bottle] 3 hr < 10 days < 10 days
Factor XI assay Blue cap vacutainer [1.3ml, 2ml or 5ml paediatric bottle] 3 hr < 10 days < 10 days
Factor XII assay Blue cap vacutainer [1.3ml, 2ml or 5ml paediatric bottle]

3 hr

< 10 days

< 10 days

Factor VIII inhibitors

Blue cap vacutainer [1.3ml, 2ml or 5ml paediatric bottle]

3 hr

< 1 month

< <1 month

Factor IX inhibitors Blue cap vacutainer [1.3ml, 2ml or 5ml paediatric bottle] 3 hr < <1 month < <1 month
Platelets Aggregation Studies Contact lab - ext 12123

Same day by arrangement

by arrangement

< 5 days

von Willebrand factor activity

Blue cap vacutainer [2x1.3ml, 2ml or 5ml paediatric bottle]

3 hr

< 1 month

< 1 month

von Willebrand factor multimers

Contact Lab - ext 64809 (Molecular Diagnostic Centre)

- 4-5 wks 4-5 wks

von Willebrand Factor

Blue cap vacutainer [2x1.3ml, 2ml or 5ml paediatric bottle]

3hr

< 1 month < 1 month
Ristocetin induced platelet aggregation (RIPA)

Contact lab - ext 12123

Same day

by arrangement

<5 days