Equations! Flashcards
NFP?
(Pgc-πgc-Pbc)
OR
(Pgc-πgc)- (Pbc-πbc)
GFR=
Kf * (Pgc-Pbc-πgc)
Excretion rate?
Ex= Ux x V
V= volume/time= urine flow rate
Ux= urine concentration
aka rate of excretion in PSW
Excretion = ?
Excretion= Filtration- Reabsorption +Secretion
Clearance equation?
Clearance= (Ux/Px) X V
Ux= urine concentration
Px= plasma concentration
V= urine flow rate vol/time
Cinulin = ?
GFR
Ccr=?
GFR (approximate)
Cpah= ?
RPF
RPF= ?
Normal?
(Upah/Ppah) xV
Normal= 600mL/min
How do you find filtration fraction?
GFR/ RPF
tells us how much filtered plasma ends up in nephron
How do you find renal blood flow?
RBF= RPF/ 1- HCT
Filtered load (Fx) =
GFR x Px
this is also called rate filtered in PSW!!!
Fractional excretion?
Ex/Fx
Ex= excretion rate
Fx= filtered load
Normal GFR?
100-125 mL/min
What factors favor filtration?
HPc
πbs
What factors oppose filtration?
πc
HPbs
In net filtration, what is relationship of GFR to clearance?
GFR = clearance
In net reabsorption, what is relationship between GFR and C?
GFR > clearnace
In net secretion, what is relationship between GFR and Clearance?
GFR < C
What is equation for Net Acid Excretion?
NAE= TA= + NH4- HCO3
Equation for anion gap?
AG= Na- (Cl +HCO3)
What is a normal AG?
8-12
If AG is normal and acidotic you have what?
Base loss
If AG is high and acidotic, you have what?
Acid gain
What is fractional reabsorption equation?
Rx/ Fx
What does Excretion equal at Tmax?
0
What is the range of specific gravity your body can produce?
- 003= 100 mOsm
- 010= 300 mOsM
- 032= 1200 mOsM
from psw #3
