Virbac New Zealand


Speed™ T4

For the detection of thyroid related endocrine disorders in cats and dogs, with the Speed Reader™ analyser

  • Cat
  • Dog
  • Diagnostic
  • Laser-Induced Fluorescence
    Laser-Induced Fluorescence

The Speed™ T4 assay is a rapid immunochromatographic quantitative test which measures the circulating total T4 by laser-induced fluorescence analysis. The test should be performed only with a Speed Reader™ analyser.


Hypothyroidism and hyperthyroidism are among the most common endocrine disorders in dogs and cats. The Speed™ T4 test can be used for senior care screening, diagnosis in the presence of suggestive symptoms or for treatment monitoring.

Speed™ T4 assay permits a first line evaluation of the thyroid gland during the consultation. Simple and fast, the Speed™ ​​T4 test offers to the possibility to have reliable quantitative results within 15 minutes. 


Serum or plasma (Heparin-Li)


18 months between 2°C and 8°C


The correlation with the reference method was very good for both canine and feline samples (R2 = 0.91 and R2 = 0.95, respectively) and demonstrated a high association between the Speed™ T4 assay and the reference method (canine and feline chemiluminescent-enzyme immunoassay; IMMULITE®2000)

Speed T4 Performance


1. B. RANNOU, Evaluation of a point-of-care immunoassay (Speed™ T4) in the measurement of feline and canine total thyroxine, ESVCP-ESVONC Congress, 20-22 October, 2016, Nantes, France

Read moreRead less

Related products

Speed Reader™

Read more

Speed™ CPSE

Read more

Speed™ Cortisol

Read more

Speed™ Progesterone

Read more

Speed™ cCRP

Read more

Speed Reader Instructional Videos
VIDEO: Set up of Speed Reader™

VIDEO: Set up of Speed Reader™

VIDEO: Using Speed Reader™

VIDEO: Using Speed Reader™