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.
Container/Tube: Local newborn screening card
Specimen Volume: 2 blood spots
1. Do not use device or capillary tube containing EDTA or ACD to collect specimen.
2. At least 1 spot should be complete, unpunched.
3. An alternative blood collection option for patients >1 year of age is fingerstick. Include type of feeding information on the collection card.
4. Do not expose specimen to heat or direct sunlight.
5. Do not stack wet specimens.
6. Keep specimen dry.
7. If collection of a new specimen is necessary, let blood dry on the Supplemental Newborn Screening Card (Supply T493) at ambient temperature in a horizontal position for 3 hours.
Forms: 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.
Blood Spot: 1
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)|