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Test ID: VWD2N    
von Willebrand Disease 2N (Subtype Normandy), Blood

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Specimen Type Describes the specimen type needed for testing

Whole blood

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 / Coagulation Factor VIII Activity Assay, Plasma; VWAG / von Willebrand Factor Antigen, Plasma; and/or RIST / 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.

1 mL of blood in 3-mL ACD tube

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 TypeTemperatureTime
Whole bloodAmbient (preferred)
 Refrigerated