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Test Code SNS Supplemental Newborn Screen, Blood Spot

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Whole blood


Additional Testing Requirements


A repeat specimen is required within 1 week of birth for infants tested before they are 12 hours old.



Specimen Required


Patient must be older than 12 hours and less than 1 week of age.

 

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

Preferred: Blood Spot Collection Card

Acceptable: Whatman Protein Saver 903 Paper, Munktell, PerkinElmer 226 filter paper, or local newborn screening card

Specimen Volume: 3 Blood spots

Collection Instructions:

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

2. Completely fill at least 3 circles on the filter paper card (approximately 100 microliters blood per circle).

3. Let blood dry on the Blood Spot Collection Card at ambient temperature in a horizontal position for 3 hours.

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

5. Do not stack wet specimens.

6. Keep specimen dry.

Additional Information:

1. For collection instructions, see Blood Spot Collection Instructions.

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

3. For collection instructions in Chinese, see Blood Spot Collection Card-Chinese Instructions (T800).


Specimen Minimum Volume

1 Blood spot

Specimen Stability Information

Specimen Type Temperature Time Special Container
Whole blood Ambient (preferred) FILTER PAPER
  Frozen  FILTER PAPER
  Refrigerated  FILTER PAPER

Reference Values

An interpretive report will be provided.

Day(s) Performed

Monday through Saturday

CPT Code Information

83789

Genetics Test Information

This screening test includes all disorders recommended by the American College of Medical Genetics detectable by tandem mass spectrometry.(1)

Report Available

2 to 3 days

Specimen Retention Time

2 years

Reject Due To

Blood spot specimen that shows serum rings or has multiple layers Reject
Insufficient specimen Reject
Unapproved filter papers Reject