Physiology Flashcards
1
Q
Diffusion
A
permeability constant: Kp= solubility / √MW
Q = Kp x (Area/thickness) x (C1-C2)
2
Q
Total blood volume
A
Plasma V x100 / (100 - HCT)
3
Q
Measure fluid compartments
A
volume of compartment = mass of indicator / concentration in compartment
4
Q
Osmotic pressure (van’t Hoff)
A
π = RTC
C = osmolality (mosm/kg H20
5
Q
Plasma osmolality
A
2 x [Na] +[glucose] + [urea}
6
Q
Gibbs-Donnan
A
[cation]a x [anion]a = [cation]a x [anion]b
7
Q
Nerst
A
capillary wall potential (mV) = RT /ZF loge conc in /Conc out
8
Q
Starling forces
A
π = colliod osmotic pressure P = hydrostatic pressure int = interstitial c = capillary
Pressure gradient = (Pc + πint) - (Pint + πc)
Rate of filtration = K (Pc + πint) - (Pint +πc)
9
Q
Stroke volume
A
SV = EDV - ESV
10
Q
Ejection fraction
A
SV/ EDV
11
Q
Cardiac output
A
CO = HR xSV
12
Q
Cardiac Index
A
CO / BSA
13
Q
SVR
A
SVR = MAP - CVP /CO x80
14
Q
MAP
A
MAP - CVP = CO x SVR
15
Q
Fick
A
CO = V02 / (Ca02 - Cv02)
