Suspected Myxedematous Coma

890 Words2 Pages

April 14, 2014

Path Chart: 40 year old female with suspected myxedematous coma

Etiology/Risk Factors Structural/Physiological Alterations Clinical Manifestations/Complications

Etiology:

• Severe hypothyroidism with low levels of T3 and T4 hormones

Types:

• Primary: impairment of thyroid gland (No TH)

o May be autoimmunity (Hashimoto thyroiditis), surgery (thyroidectomy), Iatrogenic (radioactive iodine ablation), congenital

o Most common

• Secondary: impairment of pituitary gland (no TSH)

• Tertiary: impairment of hypothalamus (no TRH)

• Subclinical: No manifestations

Risk Factors:

• People with history of chronic hypothyroidism

• Iodine deficiency

o Iodine component in creation of thyroid hormones

o Uncommon in U.S. because of fortified foods but common worldwide

• Drugs: propylthiouracel, methimazole, anesthesia, barbituates, beta blockers, diuretics, lithium, narcotics, phenothiazines, phenytoin (alters binding of T4 to TBG), rifampin, tranquilizers

• Females

o 10 times more common in women

o Women are more likely to develop autoimmune diseases

o Patient has higher risk

• 65 years and older

o Overt HPO: 1.7%

o Subclinical HPO: 13.7%

o Patient has lesser risk because <65 yrs

• Postpartum: 6 – 8.8%

• Winter months/ Cold

o 90% occur in winter months

• Infection

• Type 1 Diabetes

o 5-8% risk

o 25% pospartum

• Pulmonary hypertension (>25 mmHg)

o 23 – 49%

• Down syndrome:

o 10-40%: natural elevated level of antithyroid peroxidase antibodies

• Turner Syndrome:

o 36%: natural elevated antithyroid peroxidase antibodies

• First degree relatives with autoimmune hyper/hypothyroid disorder

Prevalance:

• U.S.: 0.3%

• White: 5.1%

• Hispanic: 4.1%

• Black: 1.7%

Incidence...

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Matthew V., Misgar R., Ghosh S., Mukhopadhyay P., Roychowdhury P., Pandit L.,… Chowdhury S (2011). Myxedema Coma: A New Look Into

An Old Crisis. Journal of Thyroid Research, 1-7.

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EMS Magazine, 36(11), 66-9.

Porth, C. (2005). Pathophysiology: concepts of altered health states (8th ed.). Philadelphia: Lippincott Williams & Wilkins.

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