Factor XII, Activity FAC12

Method(s) Clot Detection
Specimen Required
Collect

One adequately filled 3.0 mL light blue (sodium citrate) top tube.

Transport

**TIME SENSITIVE** For specimens that cannot be shipped to the laboratory to arrive within 4 hours of collection, see Collection and Processing of Coagulation Specimens information (link below).

Remarks

Draw blood into citrate (light blue) top tube filled to the proper level (1 part anticoagulant to 9 parts blood). Invert tube 3 to 4 times to avoid clotting.

Stability Ambient, Refrigerated: 4 hours. Frozen platelet-poor plasma: 2 weeks.
Unacceptable Conditions

Clotted, hemolyzed, collected in wrong tubes, tubes less than 90% full, non-frozen plasma, or exceed stability limits.

Schedule Tue, Thu
Billing Code 4010128
CPTCode 85280
Notes

Anticoagulant therapy may interfere with results.

Preferred Specimen Collection Device(s)
Reference Interval

72-155 seconds.

No Appointment Necessary
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12 Patient Service Centers in Central New York.

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