Formulas Flashcards
1
Q
Cardiac output
A
CO = heart rate x stroke volume
2
Q
Systemic blood pressure
A
SBP = CO x SVR
CO = cardiac output SVR = systemic vascular resistance
3
Q
Stroke volume
A
SV = EDV ESV
EDV = end diastolic volume ESV = end systolic volume
Stroke volume depends on: afterload, preload and contractility
4
Q
Blood flow through any vascular bed
A
Q = P1-P2 / R
P1-P2 = pressure in artery supplying the vascular bed - pressure in vein draining it. R = resistance in that vascular bed.
5
Q
Poiseuille’s law formula
A
6
Q
GFR
A
GFR = NFR x Kf
NFR = net filtration rate - depends on glomeruli / capsule pressures Kf = filtration coeficient -> depends on surface area and permeability
7
Q
Renal clearance equation
A
Cx = (Ux * V) / Px
Cx = clearance (mL/min) Ux = urine concentration (mg/mL) V = urine flow rate (mL/min) Px = plasma concentration (mg/mL)