Protein S, total

Alphabetical Test listing

Protein S, total-994

Protein S, total

Confirmation and characterization of protein S (PS) congenital deficiency

Sodium citrate (Na cit) plasma
1.0 mL
0.5 mL
  • Evacuated collection tubes must be filled to completion to ensure a proper blood to anticoagulant ratio.
  • Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times to prevent clotting
  • A discard tube is not required prior to collection of coagulation samples, except when using a winged blood collection device (ie, "butterfly"), in which case a discard tube should be used.

Platelet poor citrated plasma samples (PPP) should be obtained by double centrifugation.

  1. Centrifuge for 10 minutes and carefully remove 2/3 of the plasma using a plastic transfer pipette, being careful not to disturb the cells.
  2. Deliver to a plastic transport tube, cap, and recentrifuge for 10 minutes.
  3. Use a second plastic pipette to remove the plasma, staying clear of the platelets at the bottom of the tube.
  4. Transfer the plasma into a LabCorp frozen purple tube with screw cap, labelled as PPP
  5. Freeze immediately and maintain frozen until tested.

Frozen (strict)

LabCorp Burlington (164518): R-NX
2 - 4 days



0 to 3 days:             27 - 55
4 days to 6 months: 44 - 111
> 6 months:            60 - 150

Result 27823-4