Shared Flashcard Set

Details

Endo ICM
Hypo & Hypercalcemia
9
Medical
Graduate
11/06/2010

Additional Medical Flashcards

 


 

Cards

Term
How much of our dietary calcium intake is usually absorbed?
Definition
40-50%
Term
Describe the distribution of serum calcium.
Definition
40% bound to albumin
15% complexed
45% free (ionized)
Term
When would the total calcium measurement give a falsely low estimate, and how do you correct for this?
Definition
hypoalbuminemia or acidosis
add .8 to the total calcium value for each 1g/dl decrease in albumin below 4
Term
What are the functions of PTH?
Definition
increase renal Ca reabsorption and phosphate excretion
increase renal production of Vit D, which increase intestinal calcium and phosphate absorption
increase resorption of calcium and phosphate from bone
Term
What are the measureable forms of vitamin D?
Definition
25-hydroxyvitamin D (calcidiol)- primary circulating form, best measure of body stores, but inactive
1,25-dihydroxyvitamin D(calcitriol): active form
Term
What functions do vitamin D and PTH have in common?
Definition
increase renal calcium reabsorption
increase calcium and phosphate reabsorption from bone
Term
What are the functions of vitamin D?
Definition
increase renal calcium reabsoption
inhibit PTH production and release
increase resorption of Ca and phosphate from bone
Term
What are the symptoms of hypercalcemia?
Definition
stones, bones, abd groans (PUD, pancreatitis, anorexia, constipation), and psychic moans (lethargy, depression, confusion, coma). also muscle weakness
Term
What can hypercalcemia lead to?
Definition
renal failure, nephrogenic diabetes insipidus, nephrolithiasis, shorterning of QT interval on EKG
Supporting users have an ad free experience!