1
USMLE
USMLE step 1 – equations Exam
Questions with Correct Verified
Solutions 100% Guaranteed Pass
Stroke volume - ANS ✓SV = end diastolic volume - end systolic volume
Ejection fraction - ANS ✓EF= (stroke volume/ end diastolic volume) x 100
Resistance - ANS ✓R= driving pressure/ flow
R= (8 × viscosity x length)/ πr^4
Net filtration pressure - ANS ✓filtration pressure = [(Pc - Pi) - (πc - πi)]
Glomerular filtration rate - ANS ✓GFR = clearance of inulin (freely
filtered, neither secreted nor reabsorbed)
= ([inulin] in urine / [inulin] in plasma) × urine flow rate
Glomerular filtration rate - ANS ✓GFR = Kf [(Pgc - Pbs) - (πgc - πbs )]
Effective renal plasma flow - ANS ✓ERPF = clearance of PAH (freely
filtered, actively secreted), underestimates true RPF by ~10%
USMLE step 1 - equations
USMLE
USMLE step 1 – equations Exam
Questions with Correct Verified
Solutions 100% Guaranteed Pass
Stroke volume - ANS ✓SV = end diastolic volume - end systolic volume
Ejection fraction - ANS ✓EF= (stroke volume/ end diastolic volume) x 100
Resistance - ANS ✓R= driving pressure/ flow
R= (8 × viscosity x length)/ πr^4
Net filtration pressure - ANS ✓filtration pressure = [(Pc - Pi) - (πc - πi)]
Glomerular filtration rate - ANS ✓GFR = clearance of inulin (freely
filtered, neither secreted nor reabsorbed)
= ([inulin] in urine / [inulin] in plasma) × urine flow rate
Glomerular filtration rate - ANS ✓GFR = Kf [(Pgc - Pbs) - (πgc - πbs )]
Effective renal plasma flow - ANS ✓ERPF = clearance of PAH (freely
filtered, actively secreted), underestimates true RPF by ~10%
USMLE step 1 - equations
