Types

• TSH is produced by the Anterior Pituitary. It stimulates the thyroid to release the hormones Thyroxine (T4) and Triiodothyronine(T3) into the blood. TSH along with its regulatory hormone Thyrotropin releasing hormone (TRH) is part of the feedback system to maintain stable amounts of thyroid hormones in the blood
• If the Thyroid relea...

Description

• 0.35 -5.50 uI U/ml

Pediatric normal range-

• Birth to 4 days-1.0 -39 .0 uI U/ml
• 2 to 20 weeks- 1.7 to 9.1 uI U/ml

When to get Tested

• When there is s/s of Hyperthyroidism (Increased heart rate, Anxiety, weight loss, difficulty sleeping, tremors in the hands, weakness, Menstrual irregularity)
• When there is s/s of Hypothyroidism (Weight gain, Dry skin, Constipation , Cold Intolerance, puffy skin , hair loss, fatigue , menstrual irregularity)

Elevated Level

• Primary untreated hypothyroidism
• Hashimoto’s thyroiditis including those with clinical hypothyroidism
• Other conditions such as –iodine deficiency goitre, iodine induced goitre or lithium treatment

Decreased Level

• Hyperthyroidism (due to Toxic multi nodular goitre , Autonomously functioning thyroid adenoma, Treated Grave’s disease , Thyroiditis, Extra thyroidal thyroid hormone source
• Over replacement of thyroid hormone in treatment of hypothyroidism
• Secondary pituitary or hypothalamic hypothyroidism
• Euthyroid Sick patients
• Drugs- L Dopa , Glucocorticoids, phenytoin