Thyroid Disease: Hypothyroidism, Hyperthyroidism, and Thyroid Storm

Thyroid disorders create two opposing bedside patterns. Too little thyroid hormone slows cellular metabolism and reduces adrenergic responsiveness; too much increases oxygen demand and magnifies the effects of catecholamines. The nurse first decides which direction the patient is moving and whether compensation is failing. A patient with uncomplicated hypothyroidism may need planned testing and replacement. A patient with hyperthyroidism may need rhythm and temperature assessment. A patient with fever, marked tachycardia, altered mentation, gastrointestinal symptoms, or heart failure may have thyroid storm and requires emergency treatment before the thyroid laboratory results return. Myxedema coma is the opposite emergency: hypothermia, bradycardia, hypoventilation, and depressed consciousness. The same clinical model guides the entire lesson: identify the hormone pattern, confirm or refine it with appropriate testing, and look for cardiovascular, neurological, or temperature instability that changes the priority from routine management to resuscitation.