The Leeds Teaching Hospitals NHS Trust

Total Triiodothyronine (tT3)

Total Triiodothyronine (tT3)

Measurement of total plasma T3 is a sensitive test for hyperthyroidism since levels are usually raised proportionately more than total T4. In T3 thyrotoxicosis, total T3 is elevated but total and free T4 are normal.

Tube 01 (SE) - Serum Gel
ID Tests&Tubes0124
Additional Information
Turn Around A&E: N/A
Day Case: N/A
In-Patient: 24 Hours
Out-Patient: 24 Hours
GP: 72 Hours
Send to Blood Sciences Cross Site
Contact For further details please contact Leeds Pathology customer services: leedsth-tr.pathologycustomerservice@nhs.net.
Collection Con Minimum volume - 250µl serum / plasma
Instructions for Lab Staff: Standard lab processing- No special requirements
Sample REQ Blood
Ref. Range Notes Blood Sciences reference ranges are available through the useful information and links page:
https://www.leedsth.nhs.uk/a-z-of-services/pathology/blood-sciences/useful-information-and-links/
Units nmol/L
Telepath TT31L
ICE Codes LTT3