Test ID: VWD2N
von Willebrand Disease 2N (Subtype Normandy), Blood
Specimen Type 
Describes the specimen type needed for testing
Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.
Container/Tube:
Preferred: Yellow top (ACD solution B)
Acceptable: EDTA, sodium citrate
Specimen Volume: Full tube
Collection Instructions:
1. Invert several times to mix blood.
2. Send specimen in original tube.
Additional Information: If F8A/9070 Coagulation Factor VIII Activity Assay, Plasma; VWAG/9051 von Willebrand Factor Antigen, Plasma; and/or RIST/9046 Ristocetin Cofactor, Plasma have been previously performed on the patient, include results of these tests when submitting specimen for testing.
Forms:
1. Coagulation Patient Information Sheet (Supply T675) in Special Instructions
2. New York Clients-Informed consent is required. Please document on the request form or electronic order that a copy is on file. An Informed Consent for Genetic Testing (Supply T576) is available in Special Instructions.
Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.
Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected
| Hemolysis | Mild OK; Gross OK |
| Lipemia | Mild OK; Gross OK |
| Icterus | NA |
| Other | Green top (heparin) tube |
Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole blood | Ambient (preferred) | |
| Refrigerated | ||
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