# 4.1 Renal Blood Flow DSA Equations Flashcards

What is the equation for urine excretion rate?

Urine excretion rate = urine concentration of a given substance x urine flow rate

(Excretion = (Ux) (V))

What equation do we use to calculate GFR for molecules that meet our criteria?

GFR = (concentration of the substance in urine, x urine flow rate) / concentration of the substance in plasma

What is the equation for filtered load?

Filtered load = plasma concentration x GFR

What is the equation for urinary excretion?

Urinary excretion = amount filtered - amount reabsorbed + amount secreted

What is the equation for the filtration fraction?

FF = GFR/RPF

(Filtration fraction = glomerular filtration rate / renal blood (plasma) flow)

What is the equation for renal clearance?

What is the equation for tubular reabsorption?

Tubular reabsorption = filtered load - urinary excretion + amount secreted