Test 2 - PARATHYROID Flashcards
function of PTH
ionized calcium
decreased calcium concentration stimulates PTH production
due to decreased vitamin d
cause: parathyroid adenoma
hypercalemia
decreased serium phosphorus
increased serum alkaline phosphatase
increases serum PTH
hyperparathyroidism
cystic changes in bone due to osteoclastic resorption
“brown tumor”
osteitis fibrosa cystica
compensatory parathyroid hyperplasia occurs in response to decreased concentration of serum ionized calcium
most common cause is hypocalcemia of chronic renal dz
secondary hyperparathyroidism
most common cause is accidental surgical excision
chvostek sign - tap facial nerve
trousseau sign - arm cutt off with hand carpal spasm
hypoparathyoidism