test 4 Flashcards
what causes edema
too much interstitial fluid
fluid that lives in its own space, inst related to cardiac output
transcellular
too much transcellular fluid
third spacing
cation electrolytes
sodium, potassium, calcium, magnesium
anion electrolytes
chloride, bicarbonate, phosphate, sulfate
intracellular electrolytes
potassium, magnesium, phosphate
extracellular electrolytes
sodium, chloride, bicarbonate
transport that requires energy
active
transport that doesn’t require energy
passive
osmosis
movement of water from low to high concent
concentration of solvent to solute
osmolality
serum osmolality
comes from blood sample
urine osmolality
comes from pee sample
fluid volume deficient
less fluid
fluid volume excess
more fluid
crystalloids
cheap, act quickly in body, very rare to cause reactions in people, tiny particles in fluid so they can cross into or out of vessels easily, so can hydrate or pull fluid
ex: 0.9 NS, lactated ringers, 5% dextrose
colloids
large molecules, don’t move quickly, they stay in blood vessels, and don’t cross membranes easily. Very expensive. Patients can have reactions
ex- blood products, dextran, gelatin solutions
diffusion
solute moves from high to low to equal concent.
movement of water and smaller products from high to low pressure
filtration
what are the 3 major systems involved in fluid regulation
endocrine, renal and nervous system
what is thrist triggered by
hypothalamus due to changes in plasma osmolality
sensible
measurable
insensible
not measurable
ADH
increase water absorption, decrease urine output
from pit gland, releases when BP drops