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Prekallikrein Factor, Activity
0099043
Ordering Recommendation
Evaluate the cause of an isolated prolonged PTT in a patient who is not currently bleeding.
Mnemonic
PREKALL
Methodology
Electromagnetic Mechanical Clot Detection
Performed
Tue
Reported
1-8 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
Lt. blue (sodium citrate). Refer to Specimen Handling at aruplab.com for hemostasis/thrombosis specimen handling guidelines.  
Specimen Preparation
Transfer 2 mL platelet-poor plasma to an ARUP Standard Transport Tube. (Min: 1 mL)  
Storage/Transport Temperature
CRITICAL FROZEN. Separate samples must be submitted when multiple tests are ordered.  
Unacceptable Conditions
Serum. EDTA plasma, clotted or hemolyzed specimens.  
Remarks
 
Stability
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 2 weeks  
Reference Interval
55-207%
Interpretive Data


Note
CPT Code(s)
85292
Components
Component Test Code*Component Chart NameLOINC
0099043Prekallikrein (Fletcher) Assay52759-8
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Fletcher Factor