Myxedema coma is the life-threatening manifestation of which condition?

Appeared in: DSSSB 6 September 2024

Explanation

Myxedema coma is the most severe, life-threatening form of decompensated hypothyroidism.
It represents a state of extreme metabolic slowdown, affecting all body systems.
Key features include profound hypothermia, altered mental status (lethargy to coma), hypoventilation, and cardiovascular collapse.
It is a medical emergency with a high mortality rate, often triggered by stressors like infection or cold exposure in patients with untreated hypothyroidism.

Option A: The life-threatening complication of hyperthyroidism is a thyroid storm (thyrotoxic crisis), which is a hypermetabolic state.
Option C: Severe hyperparathyroidism leads to a hypercalcemic crisis, a condition caused by dangerously high blood calcium levels.
Option D: Addison's disease is primary adrenal insufficiency. Its life-threatening complication is an Addisonian (adrenal) crisis.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Life-threatening complications of major endocrine disorders as background academic context rather than a clinical decision trigger.
Early recognition of hypothyroidism symptoms (fatigue, cold intolerance, weight gain) is crucial for initiating treatment and preventing progression to myxedema coma.
Nurses must be vigilant in monitoring patients with known hypothyroidism for precipitating factors like infection, surgery, or the use of sedatives, which can trigger a crisis.
What if? If a patient with known hypothyroidism presents with a high fever, tachycardia, and agitation, the nurse should suspect a different diagnosis, such as sepsis, rather than myxedema coma. The treatment priorities would shift to identifying the source of infection and managing the hyperdynamic state.

How to Approach the Question

First, identify the key term in the question: 'Myxedema coma'.
This is a specific clinical term. Your goal is to recall its associated underlying disease.
Analyze the options, which are all endocrine disorders. This confirms the question is about endocrine emergencies.
Recall or deduce the link: 'Myxedema' refers to the characteristic non-pitting edema seen in severe hypothyroidism. 'Coma' indicates the severity of the condition.
Therefore, Myxedema coma is the extreme manifestation of hypothyroidism.
Mentally eliminate the other options by recalling their respective crises: Hyperthyroidism leads to Thyroid storm, and Addison's disease leads to Adrenal crisis.

Concept Tested & Keywords

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E6 Nursing Brunner Adult Health 3SA Vol 1 Part 4 p. 16-18

E6 Pharmacology Katzung 16e p. 1086-1088

Practise the full DSSSB 6 September 2024

Attempt every question from this paper in a timed mock, then review the full solution for each one.