Protein S, total

Alphabetical Test listing

Protein S, total-994

  
Protein S, total
  
994
  
LAB994
  
MSO
  
PS
  

Confirmation and characterization of protein S (PS) congenital deficiency

  
Sodium citrate (Na cit) plasma
  
  
1.0 mL
  
0.5 mL
  
  • Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate.
  • Evacuated collection tubes must be filled to completion to ensure a proper blood to anticoagulant ratio.
  • The sample should be mixed immediately by gentle inversion at least six times to ensure adequate mixing of the anticoagulant with the blood.
  • 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.
  5. Freeze immediately and maintain frozen until tested.
  

Frozen (strict)

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

Immuno-turbidometric

  

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

  
85305
  
Result 27823-4
  
05/23/2019
  
12/29/2019