13. Respiratory physiology Flashcards
1
Q
PaO2 in mithochondria
A
10 mmHg (4-22)
2
Q
Volume Capacity
A
End Respiratory Volume + Tidal Volume
3
Q
Funtional Residual capacity
A
End respiratory volume + Residual Volume
4
Q
PaO2 in CO intoxication
A
PaO2 normal
5
Q
FRC from standing to lying down
A
Decrease in one liter
6
Q
ARDS hypoxemia
A
Due to shunt
7
Q
Why hypoxemia in elderly?
A
Due to increase closing capacity above FRC
8
Q
Whats closing capacity?
A
Closing volume + Residual Volume
9
Q
CaO2 formula
A
1.34xHbxSat + 0.003xPaO2
10
Q
Aa gradient
A
PAO2 - PaO2
11
Q
PAO2 formula
A
FiO2 x (760-47) - PCO2/0.8
12
Q
Changes in methilhemoglobilemia
A
PaO2 normal
Decrease Sat O2, DO2
13
Q
Changes in CO poisoning
A
Shift to the left
Conformational changes in Hb
14
Q
Anatomic dead space
A
100 - 150 ml
15
Q
VD/VT in COPD
A
Up to 0.9 . Hyperventilation to compensate
