Protein S is a naturally occuring inhibitor of the coagulation pathway. A deficiency of protein S can contribute to an increased thrombotic tendency.
Tube
05 (CP) – Citrate
ID
12674
Availability
Weds, Thurs, Fri
Additional information
Protein S is a vitamin K dependent protein and levels are therefore diminished during warfarin therapy.
Protein S levels may be reduced in pregnancy, with use of oral contraception or by HRT.
Turn around
7 days
Send to
Specialist Coagulation
Chancellor / Lincoln Wing Link Corridor
Pathology
Block 32
St James University Hospital
Beckett Street
Leeds
LS9 7TF
Contact
[LINK to specialist-coagulation]
Collection Con
Citrate x 1 (Protein S only). Citrate x 2, EDTA x 1, Serum x 1 (full Thrombophilia screen). Citrate samples full to line please.
Samples must be processed within 6 hours of being taken.
Sample REQ
Blood
Units
iu/mL
IP Acute TAT
0.7 – 1.25
IP Routine TAT
0.7 – 1.25
GP Acute TAT
0.7 – 1.25