Primary Hypofunction Secondary Hyperfunction Primary Hyperfunction Pituitary Failure Normal range THYROTROPIN (TSH) LEVEL Low Normal High Low Normal High THYROID HORMONE LEVEL Subclinical Hypofunction Subclinical Hyperfunction
Thyroid storm is a rare, life-threatening condition characterized by severe clinical manifestations of thyrotoxicosis. In national surveys from the United States and Japan, the incidence of thyroid storm was 0.57 to 0.76 and 0.20 per 100,000 persons per year, respectively, and 4.8 to 5.6 per 100,000 hospitalized patients per year. It may be precipitated by abrupt discontinuation of antithyroid drugs or by an acute event such as thyroid or nonthyroidal surgery, trauma, infection, an acute iodine load, or parturition . In addition to specific therapy directed against the thyroid, supportive therapy in an intensive care unit (ICU) and recognition and treatment of any precipitating factors is essential since the mortality rate of thyroid storm is substantial (10 to 30 percent). THYROID STORM
Precipitatants in hyperthyroid patients: abrupt discontinuation of antithyroid drugs surgery , sepsis , iodine loads , post-partum Endocrine emergency (Mortality 20-50%) A clinical diagnosis at the end of a hyperthryoid continuum
thyroid stimulating immunoglobulin (TSI) - limphosit (IgG) Antibodi berikatan dengan reseptor TSH ( TRAb ) PATOGENESIS Menghasilkan T3 & T4 Diffuse growth
KELOMPOK OBAT EFEK INDIKASI Thioamide Propiltiuurasil (PTU) Metimazol Karbimazol Menghambat fungsi TPO Menurunkan oksidasi dan organifikasi iodide Menghambat coupling iodotirosine (+) PTU menghambat konversi T4 T3 di perifer Obat jangka pendek prabedah/praRAI Metimazol lebih disukai dari PTU karena bekerja lebih cepat dan lebih sedikit efek samping Beta blocker Propranolol 20-40 mg/6 jam Metoprolol Atenolol Nadolol Mengurangi dampak hormon tiroid pd jaringan Obat tambahan, kdg obat tunggal pd tiroiditis Bahan mengandung iodin Kalium iodida Sol lugol Na ipodat Asam iopanoat Iodine Radioactive Therapy Menghambat keluarnya T4 dan T3 Menghambat produksi T4 dan T3 serta produksi T3 ekstratiroidal Persiapan tiroidektomi. Pd krisis tiroid. Bukan utk pengobatan rutin Obat lainnya -Kalium perklorat -Litium Karbonat -Glukokortikoid Menghambat transpor yodium, sintesis dan keluarnya hormon, memperbaiki efek hormon di jar dan sifat imunologis Bukan indikasi rutin. Pada subakut tiroiditis berat, dan krisis tiroid
Treatment of Hyperthyroid General principles — The principles of treatment outlined below are based upon clinical experience and case studies since there are no prospective studies. They are frequently also applied to patients with severe hyperthyroidism who do not fully meet the criteria for thyroid storm. The therapeutic regimen typically consists of multiple medications, each of which has a different mechanism of action : ● A beta blocker (if not contraindicated) to control the symptoms and signs induced by increased adrenergic tone ● A thionamide to block new hormone synthesis ● An iodine solution to block the release of thyroid hormone ● An iodinated radiocontrast agent (not available in the United States) to inhibit the peripheral conversion of T4 to T3 ● Glucocorticoids to reduce T4-to-T3 conversion, promote vasomotor stability, possibly reduce the autoimmune process in Graves' disease, and possibly treat an associated relative adrenal insufficiency ● Bile acid sequestrants may also be of benefit in severe cases to decrease enterohepatic recycling of thyroid hormones
Treatment For most patients with clinical features of thyroid storm or with impending storm ( ie , severe thyrotoxicosis that does not fully meet the criteria for thyroid storm), we begin immediate treatment with: ● Beta blocker – Propranolol preferred. ● Thionamide – Propylthiouracil (PTU) preferred. ● Iodine – Potassium iodide solution (SSKI) or potassium iodide-iodine solution (Lugol's solution). For patients with clinical features of thyroid storm , we also administer: ● Hydrocortisone – (See 'Glucocorticoids' below.) Cholestyramine is an additional adjunctive therapy, especially if the patient is allergic to thionamides . (See 'Other therapies' below.)