Specimen:

Plasma

Collection Medium:

Minimum:

Full draw required for Na Citrate tubes

Rejection Criteria:

Hemolysis, Lipemia and specimens other than Platelet-poor plasma

Delivery Instructions:

Deliver to laboratory immediately after collection.

Specimen
Instructions:

Scheduled through Hematology Consult Service.  Test will be processed 
in Hemostasis/Thrombosis (Core Laboratory). Once sample is processed 
the testing will be sent to a reference laboratory for analysis.

Separate samples must be submitted when multiple tests are ordered.

Analytic Time:

1 week

Reference Range:

An interpretive report is provided.

Comments:

Please print, complete, and submit the MayoConnect Additional Test 
Information from the Mayo Medical Laboratories with the specimen and 
A-1a Miscellaneous Request.

Note:

1. Specimen should be drawn prior to coagulation factor replacement
   therapy.

2. Double-centrifuged specimens are critical for accurate results as
   platelet contamination may cause spurious results.

3. Double centrifugation will occur in Core Laboratory.

Methodology:

Agarose gel electrophoresis/infrared dye-labeled antibody
detection

CPT Code:

85247

See also:
Von Willebrand Antigen Assay, Plasma
Von Willebrand Factor Assay (FVIIIR:RCF), Plasma

See Additional Information:
Specimens Requiring Immediate Delivery