SNS - Specimen: Supplemental Newborn Screen, Blood Spot

Test Catalog

Test ID: SNS    
Supplemental Newborn Screen, Blood Spot

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

See Informative Markers for Supplemental Newborn Screening at Mayo Clinic in Special Instructions.

 

The following algorithms are available in Special Instructions:

-Newborn Screening Follow-up for Elevations of C8, C6, and C10 Acylcarnitines (also applies to any plasma C8, C6, and C10 acylcarnitine elevations)

-Newborn Screening Follow-up for Isolated C4 Acylcarnitine Elevations (also applies to any plasma C4 acylcarnitine elevation)

-Newborn Screening Follow-up for Isolated C5 Acylcarnitine Elevations (also applies to any plasma C5 acylcarnitine elevation)

Specimen Type Describes the specimen type needed for testing

Whole blood

Additional Testing Requirements

A repeat specimen is required within 1 week of birth for infants tested before they are 24 hours old.

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.

Patient must be >24 hours and <1 week of age.

 

Supplies: Card-Blood Spot Collection Filter Paper (T493)

Preferred: Blood Spot Collection Card (T493)

Acceptable: Whatman Protein Saver 903 Paper, Ahlstrom 226 filter paper,

Specimen Volume: 3 Blood spots

Collection Instructions:

1. Do not use device or capillary tube containing EDTA to collect specimen.

2. Do not expose specimen to heat or direct sunlight.

3. Do not stack wet specimens.

4. Keep specimen dry.

5. If collection of a new specimen is necessary, let blood dry on the Blood Spot Collection Card (T493) at ambient temperature in a horizontal position for 3 hours.

Additional Information:

1. For collection instructions in Spanish, see Blood Spot Collection Card-Spanish Instructions (T777) in Special Instructions.

2. Patient education brochures in English (T523) and Spanish (T535) are available upon request.

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 Spots: 1

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected

Hemolysis

NA

Lipemia

NA

Icterus

NA

Other

Blood spot specimen that shows serum rings or has multiple layers

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)
 Frozen 
 Refrigerated