Hallmark findings are very high fever (often above 104F/40C), severe tachycardia, and hypertension.
Before you read
Test yourself first: 5 questions
Question 1 of 5
A client is admitted in thyroid storm (thyrotoxic crisis). Which set of vital signs is most consistent with this emergency?
Answer: A. Thyroid storm is a severe hypermetabolic state. Expected findings include high fever (often above 104 F / 40 C), tachycardia, hypertension, and severe agitation. Hypothermia and bradycardia would instead suggest myxedema coma.
Question 2 of 5
A client with hyperthyroidism develops thyroid storm. Which finding does the nurse expect?
Answer: B. Thyroid storm is a hypermetabolic emergency: high fever, severe tachycardia/dysrhythmias, hypertension, agitation/delirium. Manage with cooling, beta-blockers, antithyroid drugs.
Question 3 of 5
A client recovering from a thyroidectomy reports numbness and tingling around the mouth and in the fingertips. What is the nurse's PRIORITY action?
Answer: B. Perioral and digital numbness after thyroidectomy suggests hypocalcemia from inadvertent parathyroid injury. The priority is to assess for worsening neuromuscular irritability and airway compromise by checking for Trousseau and Chvostek signs while keeping IV calcium and emergency equipment available, because laryngospasm can be life threatening.
Question 4 of 5
A client with hypothyroidism is started on levothyroxine. The nurse evaluates effectiveness by noting:
Answer: B. Effective thyroid replacement reverses hypothyroid symptoms — improved energy, normalized heart rate/temperature, weight stabilization, and normalizing TSH. Worsening fatigue/cold intolerance suggests an inadequate dose.
Question 5 of 5
The nurse reviews labs for a client with primary hypothyroidism. Which pattern is expected?
Answer: B. In primary hypothyroidism the thyroid gland fails, so circulating T3 and T4 are low. The pituitary responds by increasing TSH secretion, so TSH is elevated. A high TSH with low free T4 is the classic primary hypothyroid pattern.
Keep the streak going with more questions like these, each with a full rationale.
What is thyroid storm (thyrotoxic crisis)?
It is often triggered by infection, surgery, trauma, or abrupt withdrawal of antithyroid medication in an undertreated patient. It is a true emergency: untreated mortality is high, and death results from hyperthermia and cardiac collapse.
Key points to remember
- Hallmark findings are very high fever (often above 104F/40C), severe tachycardia, and hypertension.
- Central nervous system effects include agitation, delirium, restlessness, seizures, and progression to coma.
- GI effects include nausea, vomiting, and diarrhea, contributing to dehydration.
- Dysrhythmias, especially atrial fibrillation, and high-output heart failure can develop.
- Common precipitants include infection, recent thyroid or other surgery, trauma, and stopping antithyroid drugs.
Common causes
- Untreated hyperthyroid + stress
- Infection, surgery, DKA trigger
Signs & symptoms
- Hyperthermia >104°F (40°C)
- HR >130, dysrhythmias, HTN
- Delirium, agitation, seizures
Nursing priorities
- Maintain airway and circulation, and aggressively lower temperature with cooling blankets and acetaminophen (never aspirin).
- Administer antithyroid drugs (PTU or methimazole), then iodine, plus beta blockers and corticosteroids as ordered.
- Provide continuous cardiac monitoring and treat dysrhythmias and heart failure.
- Give IV fluids and electrolyte replacement, and provide a cool, calm, quiet environment.
- Identify and treat the underlying trigger such as infection.
Labs & values
Patient teaching
- Never abruptly stop antithyroid medication, as this can trigger thyroid storm.
- Report fever, infection, or extreme palpitations promptly when you have hyperthyroidism.
- Keep all follow-up appointments to ensure thyroid levels stay controlled.
Red flags: report now
- Hyperthermia, severe tachycardia, and altered mental status together demand immediate emergency intervention.
- Never give aspirin, which displaces thyroid hormone from binding proteins and worsens the crisis.
- Report worsening dysrhythmias, hypotension, or signs of cardiovascular collapse immediately.
References
Clinical references for this topic
