Respiratory Calculations Flashcards
1
Q
Lung Compliance
A
TV/(PIP-PEEP) or delta V/delta P
2
Q
PAO2 (partial pressure of alveolar oxygen)
A
PAO2=[FiO2 x (Pb-Ph2o)] - PaCO2/RQ
3
Q
A-a Gradient
A
PAO2-PaO2
4
Q
Total O2 Content
A
(1.39 x Hgb x %sat) + 0.003 PO2
5
Q
Alveolar Minute Ventilation
A
(TV-DV) x RR
6
Q
Deadspace Volume (on average)
A
2 mL/kg of IBW
7
Q
Calculating Dead Space with PaCO2 and ETCO2
A
(PaCO2-ETCO2)/PaCO2- apply percentage to TV
8
Q
Dissolved CO2
A
PaCO2 x 0.067
9
Q
% of Nitrogen in room air
A
78%
10
Q
IBW
A
Women 105 + 5 lbs (every in over 5’)
Men 106 + 6 lbs (every in over 5’)
