Endocrine Flashcards
Hypoglycemia
Blood glucose less than 50
sxs- weakness, feels like passing out, hand tremors, and anxiety, difficulty concentrating
Type I DM is more common in what group
school aged children
Type I DM sxs
onset of persistent thirst (polydipsia)
frequent urination (polyuria)
weight loss
feeling of hunger
may be accompanied by blurred vision
breath fruity odor
large amounts of ketones in urine
children may present with DKA (neurological sxs such as drowsiness and lethargy, which can progress to coma)
may report recent viral illness before onset of sxs
diagnosis peaks from ages 4-6 years and again from ages 10-14 years
primary hyperthyroidism (thyrotoxicosis)
very low TSH that is undetectable with elevations in both serum free T4 and T3 levels. Most common cause is graves disease
What is Grave’s disease?
(hyperthyroidism)
autoimmune causing hyper function and production of excess thyroid hormones (T3 and T4)
What autoimmune disease are women with Grave’s disease at risk for?
rheumatoid arthritis (RA) and pernicious anemia (PA) and for osteopenia/osteoporosis due to increased metabolism
Describe the classic signs for Grave’s disease
Middle-aged woman loses a large amount of weight rapidly with anxiety and insomnia.
Cardiac sxs- palpitations, hypertension, atrial fibrillation, premature atrial contractions
warm and moist skin with increased perspiration
ophthalmopathy and lid lag
frequent bowel movements (looser stools)
amenorrhea and heat intolerance
enlarged thyroid goiter/thyroid nodules
pretrial myxedema (thickening of the skin usually located in the shins giving an orange-peel appearance
Describe the OBJECTIVE findings for Grave’s disease
Thyroid: diffusely enlarged gland (goiter), toxic adenoma, or multi nodular goiter. May be tender to palpation or asymptomatic.
Extremities: Fine tremors on both hands, sweaty palms, pretrial myxedema
Eyes: lid lag, exophthalmos in one or both eyes
Cardiac: tachycardia, atrial fibrillation, congestive heart failure, cardiomyopathy
integumentary: fine hair, warm skin
neurological: brisk deep tendon reflexes
What labs are appropriator Grave’s disease
very low TSH <0.5 mU/L, elevated serum free T4 and T3
positive thyrotropin receptor antibodies (TRAb) aka thyroid-stimulating immunoglobulin (TSI)
positive thyroid antibody (TPO)
Drugs used for hyperthyroidism
Propylthiouracil (PTU)- shrinks thyroid gland/decrease hormone production
methimazole (tapazole)
SE: skin rash, granulocytopenia/aplastic anemia, thrombocytopenia (check CBC with platelets), hepatic necrosis (monitor CBC, LFTS)
What is the adjunctive treatment for hyperthyroidism
Usually given before thyroid under control to alleviate symptoms of hyperstimualtion (anxiety, tachycardia, palpitations)
Beta-blockers are effective (propranolol, metoprolol, atenolol)
Radioactive iodine tx for hyperthyroidism
Contraindicated in pregnancy-1st line treatment is PTU (propylthiouracil)
PTU is 1st line tx (can cause liver failure)
Hyperthyroidism complications
thyroid storm (thyrotoxicosis):
heart rate, blood pressure, and body temp can soar to dangerous high levels. Sx= Decreased LOC, fever, abdominal pain
what are the laboratory findings of thyroid disease
TSH-used for both screening and monitoring
Drug-induced thyroid disease
lithium, amiodarone, high doses of iodine, interferon-alfa, dopamine
Hypothyroidism
High TSH with low free T4 levels
most common cause-hashimoto’s thyroiditis, postpartum thyroiditis, and thyroid ablation with radioactive iodine