Homocysteine (Total), Methylmalonic Acid, and Methylcitric Acid, Blood Spots
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.
Supplies: Card-Blood Spot Collection (Filter Paper) (T493)
Preferred: Card-Blood Spot Collection (Filter Paper) (T493)
Acceptable: Whatman Protein Saver 903 paper
Specimen Volume: 2 blood spots
1. Completely fill at least 2 circles on the filter paper card (approximately 100 microliters blood per circle).
2. Let blood dry on filter paper at room temperature in a horizontal position for 3 or more hours.
3. Do not expose specimen to heat or direct sunlight.
4. Do not stack wet specimens.
5. Keep specimen dry.
1. 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 (T576) is available in Special Instructions.
2. Biochemical Genetics Patient Information (T602) 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 blood spot
Blood spot specimen that shows serum rings, insufficient specimen, specimens collected using a device or capillary tube containing EDTA or ACD
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)|