Reverse T3
(rT3)

Sample type

Serum

Uses

The Reverse T3 (RT3) test measures the inactive form of the hormone T3 or Triiodothyronine.

Precautions

No special preparation required.

Interfering factors

-Generally, reverse triiodothyronine tests are not necessary since triiodothyronine should not be ordered in hospitalized or sick patients.

-Hemolysis

Pre-analytical errors

Hemolyzed, unlabeled samples

The corrective actions

The sample should be rejected and another sample requested.

Post-analytical errors

1-Writing a wrong result or wrong name in the report

2-report were sent to incorrect patient

The corrective actions

1- If the report is not delivered to the patient and this error is discovered, the correct result or the correct name must be written, but if the report is delivered to the patient, you must communicate with the patient, apologise to him, and tell him that an error has occurred and replace it with the correct report.

2-Communicate with patient ,apologizing for the error, and providing him with the correct report.

Reference range

1. 6-12 months old – 8.1 to 52.8 ng/dL

2. 1-15 years old – 8.3 to 22.9 ng/dL

3. 16 years or older – 10 to 24 ng/dL

rT3 levels may naturally increase with age