Lecture 1 Formulas

Question 1

FiO2

Answer 1

FIO2 = (1+0.21x)/(1+x)

Question 2

Time Constants

Answer 2

Washout
t=1/e^x
Washin
t=1-1/e^x

Question 3

Half-Life

Answer 3

Half-life = 1/e^0.69314718

1 Half-life = 0.693 x 1 time constant

Question 4

Ventilation Time Constants

Answer 4

t=volume undergoing washout/flow of perfusing fluid
Generally considered 1 min
Vt=V0*e^(-t/CR)
Vt = volume at t seconds
V0 = volume at 0 seconds
e = 2.718
C = Compliance
R = Resistance

Question 5

Ohm’s Law

Answer 5

V=IR

Question 6

Pressure, flow, resistance

Answer 6

P=QR

R=P/Q=P/(V/t)=P*t/V

Question 7

Cardiac output

Answer 7

Dye is injected and measured in a washout curve

Cardiac output is then calculated by finding the area underneath the curve. integral

Question 8

Fractal

Answer 8

A curve or geometric figure, each part which has the same statistical character as the whole. Describe veins, arteries, nerves, airway

Question 9

Temperature Conversions

Answer 9

F=9/5*C + 32
C=5/9(F-32)
K=C-273.15

Question 10

Dalton

Answer 10

Measure of molecular weight or mass. One hydrogen atom is 1 dalton.

Question 11

Hydrogen

Answer 11

Atomic Number: 1
Symbol: H
Name: Hydrogen
Average Atomic Mass: 1.00794

Question 12

Helium

Answer 12

Atomic Number: 2
Symbol: He
Name: Helium
Average Atomic Mass: 4.003

Question 13

Carbon

Answer 13

Atomic Number: 6
Symbol: C
Name: Carbon
Average Atomic Mass: 12.011

Question 14

Nitrogen

Answer 14

Atomic Number: 7
Symbol: N
Name: Nitrogen
Average Atomic Mass: 14.00674

Question 15

Oxygen

Answer 15

Atomic Number: 8
Symbol: 8
Name: Oxygen
Average Atomic Mass: 15.9994

Question 16

Sodium

Answer 16

Atomic Number: 11
Symbol: Na
Name: Sodium
Average Atomic Mass: 22.989

Question 17

Chlorine

Answer 17

Atomic Number: 17
Symbol: Cl
Name: Chlorine
Average Atomic Mass: 35.4527

Question 18

Potassium

Answer 18

Atomic Number: 19
Symbol: K
Name: Potassium
Average Atomic Mass: 39.096

Question 19

Calcium

Answer 19

Atomic Number: 20
Symbol: Ca
Name: Calcium
Average Atomic Mass: 40.078

Question 20

Dose Response Curve

Answer 20

Sigmoid Shaped

Question 21

Population Response Curve

Answer 21

Normal Distribution