Equations

Question 1

Poiseulle’s Law

Answer 1

Fow rate Q depends on fluid viscosity η, pipe length L, and the pressure difference between the ends P

Q= (π r^4 P) / (8ηL)

Question 2

Anion gap

Answer 2

([Na+] + [K+]) - ([HCO3-] + [Cl-])

Question 3

Corrected sodium equation

Answer 3

1.6 ((measured glucose - normal glucose)/100) + measured sodium

Question 4

Corrected chloride

Answer 4

(Normal sodium/measured sodium) measured chloride

Question 5

Corrected Cl-

Answer 5

Cl- corrected = Cl- patient x (Na+ normal/Na+ patient)

Question 6

Shock index

Answer 6

HR/BP (systolic)
A shock index greater than 1.0 in dogs and 1.6 in cats can be indicative of early compensatory shock

Question 7

MAP

Answer 7

DAP + ((SAP-DAP)/3)

Calculated on the premise that approximately 2/3 of the cardiac cycle is spent in diastole

Question 8

Oxygen delivery

Answer 8

DO2 = CO [(1.36 x Hb x SaO2) + (0.003 x PaO2)]

1.36 = 02 binding capacity of hemoglobin (ml/g)
Hb= conc in g/L
0.003 = O2 dissolved in blood/ml

Question 9

Arterial content O2

Answer 9

CaO2 = (1.36 x Hb x Sa02) + (0.003 x PaO2)

Question 10

Oxygen consumption

Answer 10

VO2 = CO x (CaO2 - CvO2)

CvO2 = (1.36 x Hb x SvO2) + (0.003 x PvO2)

Question 11

SVR

Answer 11

Resistance to blood flow offered by systemic vasculature

SVR = ((MAP-CVP)/CO)
answer in mmHg

Multiply by 80 Deines s/cm