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.
Preferred: Yellow top (ACD solution B)
Acceptable: EDTA, sodium citrate
Specimen Volume: Full tube
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.
1. Coagulation Patient Information Sheet (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.
3.If not ordering electronically, complete, print, and send a Coagulation Test Request Form (T753) with the specimen (http://www.mayomedicallaboratories.com/it-mmfiles/coagulation-test-request-form.pdf)
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
Mild OK; Gross OK
Mild OK; Gross OK
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.
|Whole blood||Ambient (preferred)|