Lecture 3 - Fluid Concentration & Body Water Flashcards
define concentration
amount of dissolved substance contained per unit of volume
molarity
amount of substance relative to its molecular weight and volume
equivalence
amount of substance relative to its valence
specific gravity
weight of volume solution / weight of equal water
where is the largest store of total body water
intracellularly
what is the clinical significance of lost intracellular water stores
can help maintain body function like blood pressure in short-term, but can cause creation and cell death long-term
what are the 3 components of extracellular fluid
- interstitial fluid
- intravascular fluid/plasma
- transcellular fluid
describe interstitial fluid
- outside of cells and vessels
- freely moving to maintain volume and osmolality
describe intravascular fluid
- within vessels
- most readily accessed compartment for testing and clinical replacement
- intravascular but extracellular
describe transcellular fluid
- fluid produced by specialized cells (joints, CSF, pleural)
- not useable source
- increased with pathology
if IV fluids of dextrose and water are given, where will the fluid distribute
intracellular, interstitial, intravascular
if IV fluids of crystalloid components are given, where will the fluid distribute
interstitial and intravascular
if IV fluids of colloid components are given, where will the fluid distribute
pulled intravascularly
Which of the following body compartments has the largest % of water?
a. blood/plasma
b. interstitial
c. joint fluid
b. interstitial
If you give isotonic IV fluids into the vein of a healthy, hydrated patient, where would you expect some of the water to translocate?
interstitially
