Thyroid hormones influence almost every physiological process in the body, including growth and development, metabolism, body temperature and heart rate. TSH is a pituitary hormone that regulates the synthesis and release of the hormones T3 and T4 in the thyroid gland. TSH release is stimulated by low levels of T3, T4 in the blood (hypothyroidism) and suppressed by high levels of T3, T4. In addition, TSH release is stimulated by a hypothalamic hormone (TRH). Neonatal TSH is used in the diagnosis of congenital hypothyroidism.
Interpretation:In the first years of life, if hypothyroidism is suspected, it should be treated immediately. If not, mental retardation, growth retardation and many other metabolic problems may occur. Since the problems are not remarkable after birth, it is appropriate to investigate in a routine manner in newborns. Nevertheless, it may manifest itself with findings that the paediatrician may observe during physical examination. These findings may be abdominal swelling, dry skin, inability to gain weight, larger than normal size of the infant’s spleen, continuous sleepiness, prolonged duration of physiological jaundice.
Sample: Venous blood from the heel or arm.
Working day: Every day
Result Time: Next day at 6 PM
