The thyroxine (T4) test measures the amount of T4 hormone in a cat’s blood. T4 is produced by the thyroid gland and plays a crucial role in regulating metabolism. The circulating level of this hormone provides valuable information about thyroid gland function. A reference interval is established using statistical analysis of test results from a healthy population of cats and defines the expected range for T4 levels.
Maintaining appropriate thyroid function is vital for a cat’s overall health. Imbalances can lead to hyperthyroidism (overactive thyroid) or hypothyroidism (underactive thyroid), each with significant implications. Monitoring thyroid hormone levels aids in the early detection and management of these conditions, leading to improved quality of life and longevity. Historically, assessing T4 has been a cornerstone of feline health evaluations, enabling veterinarians to diagnose and treat thyroid disorders effectively.