Page 752 - First Aid for the USMLE Step 1 2020, Thirtieth edition [MedicalBooksVN.com]_Neat

708 SeCTiON iii Rapid Review ` equation review Rapid Review ` easily ConFuseD meDiCations

toPiC equation PaGe
Mean arterial pressure MAP = cardiac output × total peripheral resistance 285

MAP = ⁄3 diastolic + ⁄3 systolic 285
1
2
Stroke volume SV = EDV – ESV 285
Ejection fraction SV EDV − ESV 285
EF = =
EDV EDV
Resistance driving pressure ( P) 8η (viscosity) × length 286
Resistance = =
ow (Q) πr 4
Capillary fluid exchange J = net fluid flow = K [(P − P) − σ(π − π)] 297
c
i
c
i
v
f
Renal clearance C = (U V)/P 582
x x x
Glomerular filtration rate C = GFR = U × V/P 582
inulin inulin inulin
= K [(P – P ) – (π – π )]
f GC BS GC BS
Effective renal plasma flow V 582
eRPF = U PAH × P PAH = C PAH
Renal blood flow RPF 582
RBF =
1 − Hct
Filtration fraction GFR 583
FF =
RPF
Henderson-Hasselbalch equation (for [HCO ] 592
−
extracellular pH) pH = 6.1 + log 3
0.03 P 2
Winters formula Pco = 1.5 [HCO ] + 8 ± 2 592
–
2 3
–
Anion gap Na − (Cl + HCO ) 592
–
+
3
Physiologic dead space PaCO − PECO 664
V = V × 2 2
D T
PaCO 2
Pulmonary vascular resistance P pulm artery – P L atrium 668
PVR =
cardiac output
Alveolar gas equation Paco 668
Pao = Pio – 2
R
2
2

FAS1_2019_17_Rapid Rev.indd 708 11/7/19 6:09 PM