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13 Cards in this Set
- Front
- Back
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RENAL
- Renal Clearance of X (Cx) |
= (Ux) x (V) / (Px)
if Cx > GFR, then net Secretion if Cx < GFR, then net Resorption if Cx = GFR, then neither |
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RENAL
- GFR measured - GFR starling |
(using inulin or creatinine)
= UV / P = Kf [(Pgc = Pbs) - (Ogc - Obs)] usually 100 - 120 |
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RENAL
- ERPF |
(using PAH)
= UV / P |
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RENAL
- True RPF |
ERPF underestimates True RPF by 10%, thus
True RPF = ERPF / 0.9 |
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RENAL
- RBF |
= RPF / (1 - Hct)
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RENAL
- Filtration Fraction (FF) |
= GFR / RPF
(usually 20%) |
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RENAL
- Filtered Load (FL) |
= GFR x Px
(Px = Plasma concentration of X) |
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RENAL
- Free Water Clearance (C h2o) |
= V - Cosm
(Cosm = H2O occupied with solute) (w/ ADH, then C h2o < O , so free H2O retention) (w/o ADH, then C h2o > O, so free H2O secretion) (w/ loop diuretics, then C h2o = 0, so isotonic urine) |
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RENAL
- H2O occupied with solute (Cosm) |
= (Uosm - V) / Posm
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RENAL
- Filtered Load (FL) |
= GRF x Px
(Px = Plasma concentration of X) |
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RENAL
- Excretion Rate (ER) |
= (Ux) x (V)
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RENAL
- Reabsorption |
= FL - ER
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RENAL
- Secretion |
= ER - FL
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