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20 Cards in this Set
- Front
- Back
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what are the two major components of extracellular fluid?
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Plasma
interstitial fluid |
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what are the minor components of extracellular fluid?
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lymph
transcellular fluids |
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how much of body water is within intracellular spaces?
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2/3
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of the ECF, how much is interstitial and how much is plasma?
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3/4 interstitial
1/4 plasma |
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what is the 60-40-20 rule?
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TBW= 60% of mass, 40% ICF, 20% ECF
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what are 3 things that cause body water to vary?
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Age
Gender adipose tissue content |
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does a person with a high body fat % have a higher or lower TBW%?
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Lower TBW%
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how do you calculate TBW?
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TBW= LBM(.7) + AT(.1)
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who has a higher TBW% males or females?
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Males
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what happens to TBW with age?
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it decreases
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what is the ionic composition of plasma? list in order from highest concentration to lowest.
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Na+
Cl- HCO3- proteins trace K+ |
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what is the ionic composition of interstitial fluid? list in order from highest concentration to lowest.
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Na+
Cl- HCO3- trace K+ |
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what is the ionic composition of ICF? list in order from highest concentration to lowest.
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K+
PO4- proteins trace Na+ |
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what is the formula for plasma osmolarity?
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osmolarity = 2(Na+) + Glucose/18 + BUN/2.8
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What is BUN?
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Blood Urea Nitrogen content
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what is SIADH?
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Symptom of Inappropriate Anti-diuretic Hormone secretion.
high leves of ADH are secreted. causes accumulation of water in the ECF and ICF |
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what are the solutions, when added to ECF, in which hematocrit values change?
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Isotonic solutions
no absorption of water by RBCs, so they are dilluted by the solution. addition or removal of Na+ from ECF. water must be released or absorbed from ICF to compensate. Hypertonic solutions. ICF and RBC's kick more water into ECF |
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what does excessive sweating, without replenishment, do to the ECF and ICF?
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ECF osmolarity increases (sweat is hypotonic compared to ECF)
ICF volume decreases to compensate for increased ECF osmolarity |
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What is the effect of aldosterone insufficiency?
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aldosterone increases Na+ reasprbtion.
deficiency would lead to decreased ECF volume and increased ICF volume |
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What is important to remember about isotonic glucose infusions?
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the glucose is absorbed into ICF for metabolism and is broken into Energy, water, and CO2
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