LOINC Code 3050-2: T3RU

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Triiodothyronine resin uptake (T3RU). It is commonly used with the system or sample type Ser/Plas.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Both

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Triiodothyronine resin uptake (T3RU) in Serum or Plasma
• Triiodothyronine resin uptake (T3RU)
• Resin & T3 added to patient serum. Proportion of tracer bound by solid matrix measured. Result for patient serum divided by that of reference serum to give ratio. This test has been replaced by thyroid hormone binding ratio test.
• Chemistry; Endocrine; Endocrinology; Number Fraction; Percent; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; RT3U; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; T uptake; T3; T-3; T3 binding ratio; T3 RU; T3 uptake; T3RU; T3uptake; thyroid hormone; Total T3; Triiodothyroinine uptake; Triodothyrne; UniversalLabOrders

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions