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HelpTest Code 158018946 TSH (Thyroid Stimulating Hormone) Neonate (<1 Month)
Specimen Requirements
Please submit the following specimen:
Specimen Type: Serum
Container/Tube: Serum gel
Spin Instructions: Allow to sit for 30 minutes prior to spinning. Spin within 2 hours of collection.
Also acceptable: Red top tube
Specimen Transport Temperature
Ambient
Storage Temp Stability
Room Temperature: 24 hours
Refrigerated: 7 days
Methodology
LOCI—Luminescent Oxygen Channeling Immunoassay
Reference Range
Interpretative guidelines are based on the July 2012 California Department of Public Health recommendations for the follow-up of a positive newborn screen for primary congenital hypothyroidism
1. If the Newborn Screening results for TSH > 40
µIU/mL: Repeat TSH and test for Free T4. Neonate may
require immediate treatment. Refer neonate to pediatric
endocrinologist promptly.
2. If the Newborn Screening results for TSH were between 29- 40
µIU/mL: Repeat TSH and test for Free T4 level.
Treatment should be held until confirmation tests are
completed.
a. If the repeat TSH was collected
during the first 2 weeks of life and the repeat TSH result is ≤
10 µIU/mL, the result is normal and the case can be resolved
as negative.
b. If the repeat TSH results are ≥ 10 but ≤ 40 µIU/mL,
repeat the TSH and Free T4 again. Refer neonate to pediatric
endocrinologist who will interpret the TSH results in conjunction
with Free T4 values.
c. If the repeat TSH result is ≥ 40 µIU/mL, neonate may
require immediate treatment. Refer neonate to pediatric
endocrinologist promptly.
Day(s) Test Set Up/TAT
Performed:
Daily
Available STAT
STAT: < 1 hr
Routine: < 4 hrs
Aliases
TSH Neonate
CPT Code
84443