von Willebrand Factor Antigen VWFAC
Method(s) | Microlatex-Particle Mediated Immunoassay (LIA) |
---|---|
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 3-4 times to avoid clotting. |
Stability | Ambient or Refrigerated: 4 hours; Frozen platelet-poor plasma: 2 weeks. |
Unacceptable Conditions | Specimens that are clotted, hemolyzed, collected in the wrong tube, less than 90% or greater than110% filled, exceed stability limits or non-frozen plasma are unacceptable for testing. |
Schedule | Thur |
Billing Code | 4010127 |
CPTCode | 85246 |
Notes | Anticoagulent therapy may interfere with test results. |
Preferred Specimen Collection Device(s) | |
Reference Interval | |
63-190 % |