Test Overview
Test Methodology

Chromogenic Assay

Test Usage

Detection of specific coagulation factor XIII deficiency

Reference Range *

50%-100%

Test Details
Days Set Up
Tuesday - Thursday
Analytic Time

1 hour

Soft Order Code
F13
MiChart Code
Factor 13 Assay
Synonyms
  • Factor XIII Assay
  • F13
  • Factor 13 Activity
  • Factor 13 Assay
  • Factor XIII:C Assay
Laboratory
Hematopathology
Section
Coagulation
Specimen Requirements
Collection Instructions

Collect specimen in a blue top (citrate 3.2%) tube. Mix by inversion. Specimen should arrive at lab within 3 hours of collection; transport at room temperature. Alternatively, centrifuge, aliquot plasma into a polypropylene plastic vial, and freeze the specimen within 4 hours of collection. Transport frozen specimen on dry ice. Collection of the blood through lines that have been previously flushed with heparin should be avoided. If the blood must be drawn through a VAD (vascular access device), the line should be flushed with 5 mL of saline and the first 5 mL of blood or six dead space volumes of the VAD discarded.

Rejection Criteria
Specimens will be rejected if not properly filled, clotted, grossly hemolyzed, or contaminated with heparin.
Contraindications
Test is not indicated if the patient is receiving heparin anticoagulation therapy.
Blue Top Tube
Normal Volume
Full 2.7mL tube or 1mL plasma aliquot
Minimum Volume
Full 1.8mL tube or 1mL plasma aliquot
Storage Temperature
Room temperature for whole blood or frozen aliquot of citrated plasma.
Additional Information

Decreased factor XIII may be associated with: disseminated intravascular coagulopathy, acute myocardial infarction, severe liver disease, brain infarction, and recurrent first trimester spontaneous abortions.

Billing
CPT Code
85291
Fee Code
31139
NY State Approved
No