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