protein S : factor X ratio


protein S : factor X ratio

Additional information

This test is a ratio of protein S to factor X. It is only used when the patient is on warfarin. No sample is required for the ratio itself.

Sending address

Department of Haematology Camelia Botnar Laboratories Great Ormond Street Hospital Great Ormond Street WC1N 3JH

Laboratory service


Sample requirements


Reference range

Please click on the link to view reference range

Turnaround time

30 days


Upon request

Call in advance?

Not required

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