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22 Cards in this Set
- Front
- Back
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% of body weight that is water
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60
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plasma osmolality eqn
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POsm = 2(Na + K) + Glu/18 + BUN/2.8
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Quick calculation of plasma osmolality
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2*Na + 10
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Normal range of Plasma osmolality
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275-295 mOsmol/kg
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Na+ and glucose are confined to the ECF:
Where does water shift in hypontremia? |
from ECF to ICF
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Na+ and glucose are confined to the ECF:
Where does water shift in hypernatremia and hyperglycemia? |
from ICF to ECF
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What type of fluid loss do loop diuretics cause
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hypertonic Na loss
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What type of fluid loss does Addison's cause
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hypertonic Na loss
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Which way does water shift in hypotonic fluid d/o's
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from ECF --> ICF
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Explain the ICF and ECF compartment changes in hypertonic Na loss
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ECF volume contracts and ICF volume expands
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Describe the compartment changes in gain of water as in SIADH
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both ECF and ICF volumes expand
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Describe the compartment changes in presence of small cell CA of the lung
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ECFand ICF volume expansion
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Describe the compartment changes in hypotonic Na gain
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both ECF and ICF volumes expand
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What type of compartment changes will liver cirrhosis and nephrotic syndrome cause
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hypotonic --> ECF and ICF expansion
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Describe the compartment changes in hypertonic d/o’s
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water shifts out of ICF (contracts) to the ECF
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Most common hypertonic d/o
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hyperglycemia
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Compartment changes in hypotonic loss of Na?
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contraction of ECF and ICF volumes
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What happens to the ICF and ECF in extreme sweating
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contraction of ECF and ICF volumes
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Compartment changes in loss of water?
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mild contraction of ECF volume and contraction of ICF volume
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What happens to the ICF and ECF in diabetes insipidus
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mild contraction of ECF volume and contraction of ICF volume
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Compartment changes in hypertonic gain of Na?
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ECF volume expands and ICF volume contracts
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What happens to the ICF and ECF in hyperglycemia
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water shifts from ICF to ECF (ECF expands and ICF contracts)
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