Department of Haematology

Notes

  • Prolongation of the coagulation screen that can be significantly corrected by the addition of normal patient plasma may be the result of a specific factor deficiency.
  • Specific assays of each of the coagulation factors can be performed to determine the nature of the deficiency.
  • Samples that are under filled, overfilled or haemolysed give erroneous results and therefore will not be tested.
  • Tested at CGH, GRH or Oxford Haemophilia Centre.

Sample Requirements

2 x 3ml or 3.5ml Trisodium Citrate tubes x 2

3ml Trisodium citrate

Turnaround Time

Urgent Factor VIII levels: within 4 hours

Routine: within 2 weeks

Please contact the laboratory in the first instance if urgent factor assays are required.

Reference Ranges

Test Range
Factor II 50 - 150%
Factor V 50 - 150%
Factor VII 50 - 129%
Factor VIII 50 - 150%
Factor IX 65 - 150%
Factor X 50 - 150%
Factor XI 65 - 150%
Factor XII 50 - 150%

Further search terms : Coagulation Factor Assays FII FV FVII FVIII FIX FX FXI FXII II V VII VIII IX X XI XII 2 5 7 8 9 10 11 12

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