High molecular weight kininogen-994

Test info

  
High molecular weight kininogen
  
994
  
LAB994
  
MSO
  
Fitzgerald factor
HMWK
  
  • Evaluation of an elevated aPTT
  • Measurement of high molecular weight kininogen concentration

Specimen

  
Sodium citrate (Na cit) plasma
  
  
2.0 mL
  
1.0 mL
  
  • Do not draw from an arm with a heparin lock or heparinized catheter.
  • 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.
  • 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 (i.e. "butterfly"), in which case a discard tube should be used.
  • When noncitrate tubes are collected for other tests, collect sterile and nonadditive (red-top) tubes prior to citrate (blue-top) tubes.
  • Any tube containing an alternate anticoagulant should be collected after the blue top tube.
  • Serum gel tubes with clot initiators should also be collected after the citrate tubes.
  
  1. Spin 
  2. Transfer the plasma into a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp), labelled as Na cit plasma
  3. Freeze immediately 

 

 

  
Frozen (preferred)
 
Four freeze/thaw cycles are acceptable
 
Ambient - 4 hours

Performance

  
LabCorp Burlington (500460): R-NX
  
Mo
  
8 days
  

Clot-based

Clinical and Interpretive info

  

65 - 135%

Billing

  
85293
  
Result 52754-9

Tracking

  
06/24/2019
  
04/12/2022
  
04/05/2022