THYROID STIMULATING HORMONE WITH REFLEX

Mnemonic

TSHR

Synonym

TSHR

Includes

TSH with Free T4 when TSH result is outside its reference range

Specimen Collection Requirements

Collect

Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red or 3.0 mL green (sodium or lithium heparin PST) top tube

Handling

Allow serum to clot completely at room temperature (minimum: 30 minutes). Centrifuge and separate serum and plasma from cells ASAP.

Preferred Volume

1.0 mL

Minimum Volume

0.5 mL

Transport

Refrigerated (2-8°C)

Rejection Criteria

Grossly hemolyzed specimens

Stability

AFTER SEPARATION FROM CELLS: Ambient (20-25°C): 8 days; Refrigerated (2-8°C): 14 days; Frozen (at or below -20°C): 24 months

Testing Information

Performed

Sun - Fri

Method

Chemiluminescence (Third Generation)

Referral Lab

THYROID STIMULATING HORMONE WITH REFLEX

Reference Values

Reference Values

TSH: 0.27 4.20 miu/mL Free T4: 0.85-1.71 ng/mL

CPT Codes

TSH: 84443 FT4: 84439

Last Updated: Thursday, January 5, 2017 03:42:31 AM