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Table 3 Thyroid function test results

From: Tertiary hypothyroidism in a dog

PARAMETER Result Reference range
Basal total T4 (nmol/L) <6.435 15 0- 50
Basal cTSH (ng/mL) 0.1 < 0.68
Free T4 (pmol/L) 4.0 6.6 - 40
TSH response test   See below
Basal total T4 9.9  
4 hour total T4 29.3  
TRH response test   See below
Basal total T4 12.1  
Basal cTSH 0.07  
30 minute cTSH 0.56  
4 hour total T4 23.9  
Monitoring treatment   
1 month total T4 51.2 > 35 nmol/L
1 month cTSH < 0.03