Test Code SNS Supplemental Newborn Screen, Blood Spot
Performing Laboratory
Mayo Clinic Laboratories in RochesterSpecimen Type
Whole bloodAdditional 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 daysSpecimen Retention Time
2 yearsReject Due To
Blood spot specimen that shows serum rings or has multiple layers | Reject |
Insufficient specimen | Reject |
Unapproved filter papers | Reject |