Fluids Flashcards
where is 70% of body water found
ICF
What does the hypothalamus do for thirst
blood osmolality
molatity is increased, thirst is simulated
Low BP, low blood volume, thirst mechanism stimulated
What is considered fluid in intake measure
fluids (water, clear liquids), jello, soup, ice cream, IV fluids
obligatory urine output
minimum requirement body must void
400-600 ml/day
20-30 ml/hr
insensible water loss
immeasurable loss through respiration, feces, skin
High BP and fluids
High BP, high blood volume, high fluid
Voiding brings fluid out and lowers BP
Interstitial fluid colloid osmotic pressure
higher concentration of colloids inside tissues attract fluids towards themselves
Blood colloid osmotic pressure
greater concentration of colloids at the venule end draws fluid into the intravascular space
osmotic pressure
pressure of fluid moving across the semipermeable membrane
exerted by electrolytes, mainly sodium and plasma proteins
pulls water into bloodstream from ICF and ISF
Opposes hydrostatic pressure towards inside the capillary
hydrostatic pressure
pushing force exerted by water in the bloodstream
Ex: heart pumping is hydrostatic
outward force that pushes water through capillary membrane pores into ISF and ICF compartments
Increased–> more fluid will be forced from capillaries
colloid oncotic pressure
pulls fluid back from capillaries or prevents them from leaving
force exerted specifically by albumin in the bloodstream
How do people lose colloids
By being malnourished
What is albumin in the bloodstream indicative of
the protein nutrition status of the body
What can hypoalbuminemia cause and why
edema because low oncotic pressure, lower than hydrostatic
osmolarity
the concentration of osmoles of solute per liters of solution