test2 Flashcards
normal sodium
135-145
potassium
3.5-5.1
chloride
95-105
bicarb ABGas
22-26
pCO2
35-45
pO2
80-100
BUN
5-25
serum osmolality
280-300
Hypotonic IV solutions
pull water of blood and into cells. used in dehydration to rehydrate cells or restore renal function. 0.45% (1/2 NS) and 1/4NS- free h2o. monitor loa (cerebral edema) and circulation (loss in blood vol). not for brain injury or risk for 3rd shift
saline with dextrose and free h2o for maintenance of fluids D5 1/2 or 1/4
Hypertonic IV solutions
3 or 5% saline. pulls water from cells into vessels. very careful/controlled/ limited avoid vascular overload and cellular dehydration. USE WHEN SERUM SODIUM CRITICALLY LOW (
hypertonic IV- monitor frequently
neuro status (cell dehydration), lung sounds, V/s, serum sodium and urine output. not for kidney or heart disease.
SIADH
increase ADH (reabsorbs water alone) usually brain cancer, head injury. or malingnancies, CNS or Pulmonary disorders, meds or post-op.
plasma osmolarity and na low
hyponatremia and hypervolemia
restrict fluids, demeclocycline if needed (blocks ADH) or loop diuretics, high salt& protein, find and correct underlying cause
hyponatremia sxs and to do
water moves from blood (low solute/Na) to cells. swelling cells causes confusion, hypotension, edema, muscle cramps, weakness and dry skin. if due to loss of NA-replace with appropriate fluids, if due to gain of H2O- diuretic. Monitor I&O and urine spec. gravity