Endocrine Flashcards
Which “ast” does PTH stimulate?
osteoclast
What 2 places can absorb calcium?
bowel
kidney
MC cause of primary hyperparathyroidism?
benign parathyroid adenoma
causes of hypercalcemia?
hyperparathyroidism kidney failure malignancy milk-alkali TB sarcoidosis multiple myeloma meds (thiazides, lithium) prolonged bed rest adrenal insufficiency
What are the clinical manifestations of hypercalcemia?
stones (kidney)
bones (jaw fracture)
groans (psych)
moans (abd)
Dx to confirm primary hyperparathyroidism?
increased PTH and ca
phosphorus is normal
what can cause secondary hyperparathyroidism?
decreased vit D/ca
hyperphosphatemia
renal failure
hypercalcemia can cause what heart changes?
prolonged PR (contraction) shortened QT (repolarization) asystole bradycardia heart block
what is a congenital cause of hypothyroidism
digeorge
what is cvhostek sign?
tap on the facial nerve => eye, nose, mouth spasm
what sort of reflexia does hypocalcemia cause
hyperreflexia
troussea sign?
spasm of the hand/wrist with compression of the forearm from hypocalcemia
what are symptoms of hypocalcemia?
lethargy anxiety parkinsoniansim mental R personality change blurred vision
EKG change of hypocalcemia
prolonged qt
t wave changes
tx of tetany?
airway
slow IV of calcium gluconate
what is PTH used to tx?
osteoporosis
not for hypoparathyroidism
level of TSH in primary hypothyroid?
high
causes of hyperthyroid
graves #1 toxic multinodular goiter #2 hashimoto amiodarone excess I pituitary tumor pregnancy exogenous thyroid hormone
what antibodies are in graves?
peroxidase
thyroglobulin
can radio-iodine therapy be done in pregnancy
no
initial tx for hyperthyroid symptoms
bb
PTU or methimazole is used in pregnancy? which is generally preferred
PTU
methimazole
tx afibb in hyperthyroid?
need to be euthyroid to be able to fix it
digoxin
bb with caution
need to anticoagulate
what is a thyroid storm?
hyperthyroidism triggered by stress
ie pregnancy, illness, surgery, trauma
what antibodies are in hypothyroidism
anti-tsh
30% of what pts have hypothyroidism?
down
best screening test for hypothyroidism?
tsh
before init levothyroxine what should you check for?
angina and adrenal insufficiency
mc cause of thyroiditis? (infection)
staph aureus
what is subacute painful thyroiditis?
peaks in summer
young, middle aged F
course of subacute painful thyroiditis?
thyrotoxicosis => hypothyroid => euthyroid in <12 months
tx for subacute painful thyroiditis?
aspirin
drug => thyroiditis in 20% of patients
amiodarone
an asymptomatic, hard woody thyroid?
fibrous thyroiditis
which thyroid cysts are painful?
suppurative ie staph
how common are thyroid nodules?
1/12-15 of young women have them
ant pituitary releases what?
TSH ACTH prolactin GH LH TSH
post pituitary releases what?
oxytocin
ADH
what inhibits prolactin?
dopamine
what inhibitis TSH and GH?
somatostatin
what does TRH release?
TSH
prolactin
screen test for GH excess?
serum IGF-1
imaging choice for increased GH?
MRI
looking for pituitary adenoma
if you are checking IGF-1 for excess GH what are you also checking for?
prolactin
common for a pituitary adenoma to secrete both GH and prolactin
tx of increased GH?
somatostatin analog
what is pegvisomat?
GH receptor antagonist
what causes diabetes insipidus?
loss of ADH or insensitivity to it
central DI responds to what?
desmopressin
vasopressin ie ADH analog
what is osmolality in DI?
serum is high
urine is low
tx of nephrogenic DI
indomethacin alone or with
HCTZ, desmopressin analog, amiloride
what criteria are a part of metabolic syndrome?
low HDL high trigs increased waist insulin resistance BP
% of diabetics that have retinopathy
30%
complications of DM
retinopathy neuropathy nephropathy CAD poor healing (more)
1 unit of insulin is roughly how many carbs
15 grams
where is regular insulin most rapidly absorbed
abdomen
how long does regular insulin
last 5-8 hours
at what Cr is metformin CI?
> 1.5
pioglitazone is associated with what?
bladder cancer
is a thiazoliredione
GLP-1 SE?
pancreatitis
nausea
whipple triad?
hypoglycemia symptoms
(sweating, palp, anx, tremulousness)
immediate recovery with glucose
BS < 45
xanthelasma =
xanthoma affecting the eyelid
USPSTF recommends lipid screening at what age?
45
what do you monitor with statins?
liver enzymes
cushing disease is caused by what?
ACTH secreting adenoma (pituitary)
syndrome = signs of excess cortisol
most specific signs of cushing syndrome
proximal muscle wasting
pigmented striae
backache, HA
dx cushings
1) cortisol excess by dexamethasone test
<5 ug/dL excludes cushings
MC cause of addison’s
autoimmune destruction of gland
what infection can cause addison’s?
tb
does addisons or cushings cause hyperpigmentation
addisons
electrolytes in addisons?
hyperkalemia hyponatremia low glucose increased calcium decreased BUN
how would addisonian crisis present?
hypotensive
pain (abd/back)
v/d
altered mental status
dx addison’s
low 8 am cortisol < 3 ug/dL and increased ACTH
what is DHEA used to tx?
dehydroepiandrosterone
Addisons
tx of addisonian crisis?
IV saline
glucose
glucocorticoids