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19 Cards in this Set

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  • Back
How much of body weight is water?
60%
Do males or females have a higher % of body water?
males

(females have more fat)
In what compartment does most of the body water lie?
ICF
(2/3 of body water or 40% of total body weight)
What is a larger part of ECF, interstitial fluid or plasma?
interstitial fluid (3/4 of ECF)
What is the 60-40-20 rule?
60% of body weight is water (TBW)
40% of body weight is ICF
20% of body weight is ECF
What are the steps for measuring the volume of a specific compartment?
1) select appropriate marker
2) give a known amount of marker
3) wait - equilibrate and measure losses
4) measure concentration of marker
What compartment are D20, HTO, and Antipyrene markers for?
TBW
What compartment are Mannitol, Inulin, and Radioactive Sulfate markers for?
ECF
What compartment are RISA and Evan's blue a marker for?
Plasma
Which compartments have "indirect" measures?
ICF and interstitial fluid
What are the osmoliarities of ECF and ICF compartments?
osmolarity = 290 mOsm/L for both
What quantifies the small difference between the plasma and interstitial fluid?
the Gibbs-Donnan ratio effect of plasma protein
How much is 0.9% NaCl?
0.9g/100ml
How are fluid shifts categorized?
1) by whether the ECF volume increases or decreases
2) by change in body fluid osmolarity
What happens to plasma protein conc. in hyperosmotic volume expansion?
it decreases
What happens to ICF volume in adrenal insufficiency (hyposmotic volume contraction)?
it increases
What happens to hematocrit in hyperosmotic volume contraction?
no change
What happens to ECF osmolarity in isosmotic volume expansion?
no change
What happens to hematocrit in isosmotic volume contraction?
increases