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von Willebrand Comprehensive Panel 2 with Consultation [19681X]
Test Code3948551
CPT Codes
83520, 85240, 85245, 85246, 85247, 85730<br>Dependent on the complexity of the consultation, 80503 or 80504 or 80505 may be assigned. 80506 may also be billed if high complexity with more than 60 minutes
Includes
Partial Thromboplastin Time, Activated
Factor VIII Activity, Clotting
von Willebrand Factor Antigen
Ristocetin Cofactor
von Willebrand Factor Collagen Binding Assay
von Willebrand Antigen, Multimeric Analysis
Coagulation Consultation
Factor VIII Activity, Clotting
von Willebrand Factor Antigen
Ristocetin Cofactor
von Willebrand Factor Collagen Binding Assay
von Willebrand Antigen, Multimeric Analysis
Coagulation Consultation
Preferred Specimen
1 mL (x4) frozen platelet-poor plasma collected in 3.2% sodium citrate (light blue-top) tubes
Minimum Volume
0.75 mL (x4)
Instructions
See individual tests for specific specimen requirements and stabilities.
Platelet Poor Plasma: Centrifuge light blue-top tube 15 minutes at approximately 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into four new plastic vials. Plasma must be free of platelets (<10,000/mcL). Freeze immediately and ship on dry ice.
Note: Storage of whole blood at refrigerated temperatures prior to processing may lead to cryoprecipitate formation and falsely low Factor VIII and von Willebrand Factor studies.
Platelet Poor Plasma: Centrifuge light blue-top tube 15 minutes at approximately 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into four new plastic vials. Plasma must be free of platelets (<10,000/mcL). Freeze immediately and ship on dry ice.
Note: Storage of whole blood at refrigerated temperatures prior to processing may lead to cryoprecipitate formation and falsely low Factor VIII and von Willebrand Factor studies.
Transport Container
Plastic screw-cap vial
Transport Temperature
Frozen
Specimen Stability
Room temperature: Unacceptable
Refrigerated: Unacceptable
Frozen: 14 days
Refrigerated: Unacceptable
Frozen: 14 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
See individual assays
Methodology
See individual assays
Setup Schedule
Set up and Report available: See individual assays
Reference Range
See Laboratory Report
Clinical Significance
See individual assays
Performing Laboratory
| Quest Diagnostics Nichols Institute |
| 14225 Newbrook Drive |
| Chantilly, VA 20153 |
