Ordering Recommendation

Preferred first-line test to diagnose inherited or acquired factor XIII (FXIII) deficiency. Appropriate for evaluation of patients with a bleeding disorder who present with normal prothrombin time (PT), activated partial thromboplastin​ time (aPTT), and platelet count test results. Monitor FXIII therapy and confirm abnormalities detected on FXIII qualitative assay.

Mnemonic
F13 A
Methodology

Chromogenic Assay

Performed

Tue

Reported

1-8 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect

Lt. blue (sodium citrate). Refer to Specimen Handling at www.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 specimens 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: at -20°C or below: 1 month; Frozen at -70°C or below: 3 months

Reference Interval

Factor XIII Activity 69-143%

Interpretive Data



Compliance Category

Laboratory Developed Test (LDT)

Note
Hotline History
N/A
CPT Codes

85290

Components
Component Test Code* Component Chart Name LOINC
2006183 Factor XIII Activity 27815-0
* 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
  • Factor 13
  • fibrin stabilizing factor
Factor XIII Activity