| CLASS | CHEM | LP7786-9 | 
| COMPONENT | Triiodothyronine/Thyroxine | LP307573-8 | 
| PROPERTY | MRto | LP6834-8 | 
| TIME_ASPCT | Pt | LP6960-1 | 
| SYSTEM | Ser/Plas | LP7576-4 | 
| SCALE_TYP | Qn | LP7753-9 | 
| parent | Triiodothyronine | Serum or Plasma | Chemistry - non-challenge | LP381527-3 | 
| CLASSTYPE | Laboratory class | |
| ORDER_OBS | Observation | |
| UNITSREQUIRED | N | |
| STATUS | ACTIVE | 
| LONG_COMMON_NAME | en-US | Triiodothyronine (T3)/Thyroxine (T4) [Mass Ratio] in Serum or Plasma | 
| LONG_COMMON_NAME | en-US | Triiodothyronine (T3)/Thyroxine (T4) [Mass Ratio] in Serum or Plasma | 
| SHORTNAME | en-US | T3/T4 SerPl | 
| ConsumerName | en-US | T3/T4, Blood | 
| LONG_COMMON_NAME | nl-NL | Tri-iodothyronine/thyroxine [massaverhouding] in serum of plasma | 
| LONG_COMMON_NAME | es-MX | Triyodotironina / Tiroxina: Suero o Plasma : Punto temporal: Relación de masa: Cuantitativo: | 
LOINC Version: 2.78