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Myxedema Coma

Myxedema Coma Overview

The thyroid gland, located at the front part of the neck, is responsible for making substances called thyroid hormones that are important for all body cells to work properly.

In certain conditions, the thyroid becomes underactive and produces fewer amounts of its hormones, a situation called hypothyroidism. People with hypothyroidism have problems that reflect underactivity of the organs of the body, resulting in symptoms such as fatigue, feeling cold, weight gain, dry skin, and sleepiness. When the levels of thyroid hormones become very low, the symptoms get worse and can result in a serious condition called myxedema coma. Myxedema coma is a rare but life-threatening condition. People with hypothyroidism who are in or near a coma should be taken to an emergency department immediately.

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Understanding Thyroid Problems -- Diagnosis and Treatment

Your doctor can diagnose hyperthyroidism and hypothyroidism by testing the levels of thyroid hormones in your blood. Doctors measure hormones secreted by the thyroid itself, as well as thyroid-stimulating hormone (TSH), a chemical released by the pituitary gland that triggers hormone production in the thyroid. When you are hypothyroid, higher quantities of TSH are circulating in your blood as your body attempts to increase production of thyroid hormones. The reverse is true with hyperthyroidism,...

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Myxedema Coma Causes

If you have hypothyroidism, then any of the following can contribute to myxedema coma:

 

  • Infections, especially lung and urine infections

  • Heart failure

  • Stroke

  • Trauma

  • Surgery

  • Drugs, such as phenothiazines, amiodarone, lithium, and tranquilizers, and prolonged iodide use

  • Not taking prescribed thyroid medications

Myxedema Coma Symptoms

Symptoms of hypothyroidism may include the following:

 

  • Weakness

  • Confusion

  • Feeling cold

  • Low body temperature

  • Swelling of the body

  • Difficulty breathing

People who have myxedema coma are in or near a coma and not able to function normally. They require emergency care.

When to Seek Medical Care

People who have hypothyroidism and develop fever, changes in behavior or mental status, shortness of breath, or increased swelling of the hands and feet should be taken to an emergency department.
 

Exams and Tests

 

  • Blood tests are performed to check blood cell count, electrolytes, sugar, and thyroid hormone levels. Tests are also performed to evaluate how the liver and adrenal glands are functioning. 

  • Blood gases are evaluated to check for oxygen and carbon dioxide levels.

  • An ECG of the heart is performed to check for disturbances in the activity of the heart. 

  • Additional tests are performed at the discretion of the treating doctor.

Myxedema Coma Treatment Self-Care at Home

If you have hypothyroidism, be alert to your condition.

 

  • Call your doctor if you are concerned.

  • Check your blood sugar level if you are diabetic.

  • Warm yourself up with a warm blanket and seek help.

  • Take your prescribed thyroid medication if you missed them earlier.

People with myxedema coma are in a coma or nearly in a coma. They are not able to function normally. Friends or family members should take them to an emergency department immediately. Friends or family members should not give the person in myxedema coma any thyroid medication before taking him or her to the emergency department. If adrenal insufficiency is present, then administration of thyroxin (in the thyroid medication) will provoke an adrenal crisis.

Medical Treatment

  •  Intravenous fluids
  • Electrolytes replacement as necessary
  • Thyroid hormones are usually administered through a vein (intravenously or IV) to quickly correct the low thyroid hormone blood level. (Oral thyroid hormone is usually not used for severe myxedema because it may take days or weeks to obtain the proper blood level.)
  • Cortisol or other adrenal cortical hormone intravenously
  • Warming blanket if body temperature is low
  • Glucose supplements if the blood sugar level is low
  • Antibiotics if an infection is present

WebMD Medical Reference from eMedicineHealth

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