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St. John Health System
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Factor 13 (XIII) Assay

Order Name FACTOR 13
Test Number: 1501400
Revision Date 03/26/2010
Test Name Methodology LOINC Code
Factor 13 (XIII) Assay
Clot Detection  
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 2.7 mL Whole Blood Sodium Citrate 3.2% (Blue Top) Ambient whole blood or frozen aliquots
Alternate 1 2.7 mL Double Spun Plasma Sterile, Capped Plastic Tube Ambient whole blood or frozen aliquots
Instructions Please indicate anticoagulant therapy. Tubes must be filled to the proper level, no hemolysis. Improperly filled tubes can give erroneous results. Whole blood must be transported to lab immediately. If sending citrated plasma aliquots, they must be double spun then aliquot 1.5 ml plasma from each tube into individual plastic aliquot tubes and freeze. Do not pool aliquots together!
GENERAL INFORMATION
Testing Schedule Mon - Fri 
Expected TAT 1 Day 
Clinical Use This is a qualitative test for Factor XIII (13). Factor XIII stabilizes clot formation. 
CPT Code(s) 85291
Service Provided By Labcorp Oklahoma, Inc.
Lab Section Hematology