Equations Flashcards
1
Q
Minute ventillation
A
VT x frequency (breaths/min)
2
Q
VA (alveolar)
A
(VT-VD) x f
3
Q
Alveolar ventillation equation
A
VA=(VCO2 x K) / PACO2
4
Q
Alveolar gas equation
A
PAo2=Plo2 - PACO2/R + F
5
Q
Law of LaPlace
A
P (collapsing)=2T/r
6
Q
Airflow=
A
change in pressure/resistance
7
Q
Boyle’s Law
A
P1V1=P2V2
8
Q
Humidified gas
A
Px= (PB-PH20)xF
9
Q
Dry gas
A
Px=PB x F
10
Q
Fick’s Law
A
Vx=DA(change in P)/change in x
11
Q
Pressure transplural
A
Pressure alveolar - pressure interpleural = pressure lungs
12
Q
Pressure ip
A
=Pressure pleural
13
Q
Pressure chest wall
A
Pressure interpleural - Pressure atm
14
Q
V
A
Q/A
15
Q
Pdyn
A
(fluid density x v^2)/2
