This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Thyroid storm after operation is due to: \nSelect and explain. \nA. Inadequate control of hyperthyroidism, B. Massive bleeding, C. Recurrent laryngeal nerve injury, D. Postoperative infection', 'role': 'user'}, {'content': 'Answer: A \nExplanation: THYROID STORM (THYROTOXIC CRISIS)\n→ It is an emergency due to compensated hyperthyroidism.\nTreatment\n→ Non-selective beta-blocker (Propranolol):\n\nMost valuable measure in thyroid storm.\nIn thyroid storm, most of the symptoms are because of adrenergic over activity, due to increased tissue sensitivity to catecholamines in hyperthyroidism.\nThis increased sensitivity is due to increased number of beta receptors.\n\n→ Quick relief is obtained by blocking beta receptors.\n→\xa0Propylthiouracil:\n\nAntithyroid drug of choice for thyroid storm.\nReduces hormone synthesis as well as peripheral conversion of T4 to T3.\n\n→\xa0Corticosteroids (Hydrocortisone):\n\nInhibits both release of thyroid hormone from the gland and peripheral conversion of T4 to T3.\n\n→\xa0Iodides (Potassium iodide to ipanoic acid):\n\nUsed to inhibit further hormone release from the gland.\n\n→\xa0Other Measures:\n\nDiltiazem, if tachycardia is not controlled by propranolol alone.\nRehydration, anxiolytics, external cooling and appropriate antibiotics.', 'role': 'assistant'}]