fT4 (Free Thyroxine)

LABOKLIN Service ID: 126

• Single value determination: fT4 and fT3 both are strongly affected by the current metabolic state
• Just like T4, fT4 is affected by underlying diseases.
• Fasting 10 hours prior to sampling is recommended (omnivores and carnivores only).
• In cases of doubt: perform TRH stimulation test or – in dogs and cats - measure TSH concentration.

Material	Serum 0.5 ml resp. 0.4 ml (small mammals)
Method	CLIA
Duration	1 day