Prekallikrein assay

Alphabetical Test listing

Prekallikrein assay-994

  
Prekallikrein assay
  
994
  
LAB994
  
MSO
  
Fletcher factor assay
PK
  

Measurement of prekallikrein factor concentration

  
Sodium citrate (Na cit) plasma
  
  
2 mL
  
1 mL
  

Do not draw from an arm with a heparin lock or heparinized catheter.

  1. Blood should be collected in a blue-top tube containing 3.2% buffered sodium citrate.
  2. Evacuated collection tubes must be filled to completion to ensure a proper blood to anticoagulant ratio. Coag - Tube fill guidelines
  3. The sample should be mixed immediately by gentle inversion at least six times to ensure adequate mixing of the anti- coagulant with the blood.
  

Spin, separate, and freeze

  

Frozen (preferred)

Ambient - 4 hours

  
LabCorp Burlington (500194): R-NX
  
We
  
4 - 8 days
  

Factor prekallikrein activity is determined utilizing an aPTT-based one-stage clotting time assay. Factor prekallikrein-depleted plasma is used as the substrate, and the clotting time with the patient plasma is compared to the clotting time of normal pooled plasma.

  

Normal: ≥ 50 %

  
85292
  
Result 28659-1
  
06/24/2019
  
02/17/2021