Calculations

Question 1

What are the two equations for cardiac output?

What are the units?

Answer 1

Q = HR x SV
Q = HR x (EDV-ESV)
L.min

Question 2

What is the equation for SV?

What are the units?

Answer 2

SV = EDV-ESV

mL

Question 3

What are the two equations for mean arterial blood pressure?

What are the units?

Answer 3

MAP = 2/3DBP + 1/3SBP
MAP = DBP + 0.33 (SBP-DBP)
mmHg

Question 4

What is the equation for oxygen transport?
What are the units?
What do the two sides of the equation represent?

Answer 4

[O2] = ([Hb] x 1.34 x O2 sat) + (PO2 x 0.003)
mL/L
Left - O2 carrying capacity of haemoglobin
Right - Capacity of O2 dissolved in plasma

Question 5

What is the equation for BMI?

What are the units?

Answer 5

BMI = Weight(kg) / Height^2(m)

kg.m^2

Question 6

What is the equation for difference in blood oxygen concentration?
What are the units?

Answer 6

Difference = Arterial - Venous

mL

Question 7

What is the fick equation? (VO2)

Answer 7

VO2 = Q x (CaO2 - CvO2)

Question 8

What is the equation for running economy?

What are the units?

Answer 8

VO2 = 13.5(Speed(m/s))-8.5

mL/kg/min

Question 9

What is the equation for O2 cost?

What are the units?

Answer 9

O2 cost = VO2 / Speed

mL/kg/km