Arterial Blood Gas Flashcards
1
Q
What is Ventilation?
A
Air reaching the alveoli
2
Q
What is perfusion
A
Blood reaching alveoli
3
Q
What does a V/Q mismatch cause?
A
Hypoxemia
4
Q
Normal V/Q ratio
A
0.8-0.9
5
Q
What does a low V/Q ratio cause?
A
Impairs gas exchange, causes low paO2
6
Q
Hypercapnia
A
Increased Co2 in arterial blood
7
Q
Why does hypercapnia occur?
A
Decreased drive to breathe or inadequate ability to respond to ventilatory stimulation
8
Q
Hypoxemia
A
Absence of enough oxygen in the blood
9
Q
Hypoxia
A
Adequate oxygen in the tissues
10
Q
Normal acid base range for arterial blood
A
pH 7.35-7.45
11
Q
Acid-Base status in mixed venous blood
A
pH 7.33-7.43
12
Q
What does ABG show
A
Adequacy of cardiac output and tissue oxygenation
