1
Q
what is the primary reason for oxygen therapy use?
A
hypoxia
2
Q
describe hypoxia
A
decreased oxygen transport to tissues
3
Q
what are we concerned about developing in hypoxic patients?
A
metabolic acidosis due to accumulation of lactic acid
4
Q
3 causes of tissue hypoxia
A
- decreased blood perfusion/flow
- decreased oxygen content of boold
- cell’s can’t use the oxygen delivered to them
5
Q
best method for assesing if a patient requires oxygen therapy
A
analysis of arterial blood gas
6
Q
what does arterial blood gas analyse (2)?
A
PaCO2
PaO2
7
Q
normal range of PaCO2
A
35-45mmHg
8
Q
what does a decreased PaCO2 indicate?
A
- hypoventilation or acidosis
- may see increased resp rate
9
Q
what does decreased PaCO2 indicate
A
hyperventialtion
- may see decreased rr
10
Q
normal range of PaO2
A
80-110 mmHg
11
Q
what value of PaO2 indicated hypoxemia
A
<80mmHg
12
Q
what value of PaO2 indicated severe hypoxemia?
A
<60 mmHg
13
Q
A
