Equations

Question 1

SVR

Answer 1

= [(MAP-CVP)/CO] x 80
normal is 1000

Question 2

PVR

Answer 2

= [(mPAP-PCWP)/Qp] x 80

Question 3

MAP

Answer 3

= 2/3 DBP + 1/3 SBP

Question 4

Fick CO

Answer 4

= VO2 / [Hgb x 1.36 x 10 x (SaO2-PaO2)]

Question 5

Qp:Qs

Answer 5

= (Aorta sat - mixed venous sat) / (Pulm vein sat - PA sat)

NOTE systemic is numerator despite Qp:Qs

generally use IVC or SVC for venous sat
assume PV sat same as aorta sat