Card Set Information
What is ADH?
What does it do?
Anti Diuretic Hormone
Holds onto water
What is RAA?
What does it do?
Renin Angiotensin Aldosterone System
Vasoconstrictor, Holds onto Sodium
What are Natriuretic Peptides (ANP/BNP)?
Opposes the RAA
What regulates water balance?
What is diffusion?
molecular movement of solute
What is osmotic movement?
movement of water - solvent
- isotonic, hypertonic, hypotonic
What is filtration?
movement of lolute and solvent w/ H2O pressure
What is active transport?
movement of solvent and solute w/ energy expended
What is dehydration?
Fluid volume deficit
What are the types of dehydration?
Isotonic- losses equal
hypotonic- cells swell, electrolyte loss is > water loss
hypertonic- cell shrink, water loss is > electrolyte loss
What is hypovolemia?
water and electrolyte are lost equally
Causes of hypertonic
excessive sweating, diarrhea, vomiting, hyperventilation
water moves from ICF to ECF to dilute - increases osmolarity of plasma so cells shrink
Causes of hypotonic
malnutrition, excessive ingestion of hypotonic fluids - water
excessive NA++ and K+ losses form ECF = decreased osmolarity of ECF so water moves into ICF to dilute - increases osmolarity of cells so cells swell
What is hypervolemia
no shift of fluids, circulatory overload, edema
renal failure, heart failure, too much IV therapy, steroids
osmolarity of ECF decreases = increase hydrostatic pressure -> fluid moves from ECF to ICF - cells swell
What are nursing assessments of fluid deficit?
turgor & fluid mobility
- pinch/count in seconds/abnormal = > 3 sec
- tongue/membranes - furrows, dry
- wrinkled/dry skin
What are nursing assessments for fluid excess?
fluid accumulation - 3rd spacing/interstitial
- edema assessment
: 1+, 2+, 3+, 4+, brawny, weeping
- cool skin, pale, feels firm to touch over tibia, fibula, sacrum - pitting
- hand veins full and bulging