Laboratory Medicine

Test catalogue

TSH Receptor Antibodies
Test Name TSH Receptor Antibodies (TRAb, Thyroid Stimulating Immunoglobulin, TSI)
Specimen Type/Requirements Container Type = 1 Gold Top Minimum Testing Volume = 0.5 mL Serum Collect pediatric sample in red or yellow microtainer Cord blood is also acceptable.
Specimen Handling Collection Instructions: Collect sample in gold top (SST) or red top tube. Write your initials, date and time of collection on the collection label or requisition. Laboratory Staff Instructions: Serum should be separated from cells within 1 hour. Once seperated, sample should be frozen until time of testing. Avoid repeated freezing and thawing. Rejection criteria: Plasma, grossly lipemic, grossly hemolysed, mislabeled or samples of non sufficient quantity. Stability: Stable at room temperature for 7 hours, refrigerated for 6 days and frozen for 12 months. Transportation: Send sample to core lab as soon as possible.
Required Documentation
Turnaround time (TAT) 7 days	Test Utilization N/A
Reference Value Negative: < 1.8 IU/L	Cord: Negative: <= 2 IU/L Values greater than 4 IU/L are at higher risk of developing neonatal hyperthyroidism
Test Code LAB574	Methodology Electrochemiluminescence Immunoassay
Testing Location SMH-Biochemistry	Other Information Last Updated: June 22, 2026

TSH Receptor Antibodies

Test Name

TSH Receptor Antibodies (TRAb, Thyroid Stimulating Immunoglobulin, TSI)

Specimen Type/Requirements

Container Type = 1 Gold Top

Minimum Testing Volume = 0.5 mL Serum

Collect pediatric sample in red or yellow microtainer

Cord blood is also acceptable.

Specimen Handling

Collection Instructions: Collect sample in gold top (SST) or red top tube. Write your initials, date and time of collection on the collection label or requisition.

Laboratory Staff Instructions: Serum should be separated from cells within 1 hour. Once seperated, sample should be frozen until time of testing. Avoid repeated freezing and thawing.

Rejection criteria: Plasma, grossly lipemic, grossly hemolysed, mislabeled or samples of non sufficient quantity.

Stability: Stable at room temperature for 7 hours, refrigerated for 6 days and frozen for 12 months.

Transportation: Send sample to core lab as soon as possible.

Required Documentation

Turnaround time (TAT)

7 days

Test Utilization

N/A

Reference Value

Negative: < 1.8 IU/L

Cord:

Negative: <= 2 IU/L

Values greater than 4 IU/L are at higher
risk of developing neonatal hyperthyroidism

Test Code

LAB574

Methodology

Electrochemiluminescence Immunoassay

Testing Location

SMH-Biochemistry

Other Information

Last Updated: June 22, 2026