protein S : factor II ratio


protein S : factor II ratio

Additional information

This test is a ratio of protein S to factor II. 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


The Haematology Department provides a wide range of specialist tests with a special interest in the diagnosis and monitoring of coagulation disorders.

© 2011 Great Ormond Street Hospital for Children NHS Trust