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0030115
Factor XII, Activity
F12
Ordering Recommendation
Evaluate the cause of an isolated prolonged partial thromboplastin time (PTT) in a patient who is not currently bleeding.
New York DOH Approval Status
This test is New York state approved.
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 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: 2 weeks
Methodology
Electromagnetic Mechanical Clot Detection
Performed
Mon-Sat
Reported
1-3 days
Reference Interval
58-166%
Interpretive Data
Compliance Category
Standard
Note
Hotline History
N/A
CPT Codes
85280
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0030115 | Factor XII, Activity | 3232-6 |
* 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
- Coagulation Factor XII Activity Assay, Plasma
- Factor X11a
- Hageman factor
- Hageman Factor (Contact Factor)
- Intrinsic Factor Proteins
- Intrinsic Factors
- Surface Factor
Factor XII, Activity
