Commonly Used Formulas

Question 0

Cerebral Perfusion Pressure (CPP)

Answer 0

CPP = MAP - ICP

Question 1

Formula for ‘Smoking Hx’

Answer 1

Pack years = # of packs/day (x) # of years smoked

Question 2

Estimate heart rate

Answer 2

HR = 300/# of large boxes between R waves OR

1500/# of small boxes between R waves

Question 3

Mean Airway Pressure (MAP) = ?

Answer 3

_____(2 x diastolic)_+_systolic___

3

Question 4

Fick equation:

Cardiac Output

Answer 4

QT = ______VO2_______

C(a-v)O2 x (10)

Question 5

Cardiac Output:

Answer 5

QT = heart rate (x) stroke volume

Question 6

Cardiac Index:

Answer 6

CI = __QT__ cardiac output

BSA = body surface area

Question 7

Pulse pressure = ?

Answer 7

systolic pressure - diastolic pressure

Question 8

Stroke volume = ?

Answer 8

_____QT_____

Heart rate