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Test 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