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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.


Test Specimen requirements Urgent results available (from time of receipt in lab) Non-urgent results available (from time of receipt in lab) Reports available Can be performed at Central site Can be performed at Trafford 
Factor II assay Green cap vacutainer [1.3ml neonate, 2.9ml paediatric or adult] 3 hr

< 10 days

< 10 days

 Yes

No 

Factor V assay Green cap vacutainer [1.3ml neonate, 2.9ml paediatric or adult]

3 hr

< 10 days

< 10 days

 Yes

 No

Factor VII assay As above

3 hr

< 10 days

< 10 days

 Yes

 No

Factor VIII assay As above

3 hr

< 5 days

< 5 days Yes No

Factor IX assay

As above

3 hr

< 5 days

< 5 days

Yes

 No

Factor X assay As above 3 hr < 10 days < 10 days Yes No
Factor XI assay As above 3 hr < 10 days < 10 days Yes No
Factor XII assay As above

3 hr

< 10 days

< 10 days

Yes

 No

Factor VIII inhibitors

2x Green cap vacutainer [1.3ml neonate, 2.9ml paediatric or adult]

3 hr

< 1 month

< <1 month

Yes 

No

Factor IX inhibitors 2x Green cap vacutainer [1.3ml neonate, 2.9ml paediatric or adult] 3 hr < <1 month < <1 month Yes No
Platelets Aggregation Studies Contact lab - ext 12123

Same day by arrangement

by arrangement

< 5 days

 Yes

 No

von Willebrand factor activity

Green cap vacutainer [1.3ml neonate, 2.9ml paediatric or adult]

3 hr

< 1 month

< 1 month

 Yes

No 

von Willebrand Factor

Green cap vacutainer [1.3ml neonate, 2.9ml paediatric or adult]

3hr

< 1 month < 1 month Yes No
Ristocetin induced platelet aggregation (RIPA)

Contact lab - ext 12123

Same day

by arrangement

<5 days

 Yes

No