Hypoxemia

Question 0

Which 2 of the 5 causes of hypoxemia are not due to an increased A-a gradient?

Answer 0

Hypoventilation and low fraction if inspired O2

Question 1

What are the 5 causes of hypoxemia?

Answer 1

1. Hypoventilation
2. V/Q mismatch
3. Shunt
4. Diffusion defect
5. Decreased fraction of inspired O2

Question 3

When do you give a COPD pt. Home oxygen?

Answer 3

When PaO2 is <60 + Cor pulmonale

Question 4

What is the arterial Po2 when the So2 is 75%?

Answer 4

40 mmHg

Question 5

What is the arterial Po2 when the So2 is 100%?

Answer 5

97%

Question 6

Which 3 of the 5 causes of hypoxemia are due to an increased A-a gradient?

Answer 6

V/Q mismatch
Diffusion defect
Shunt

Question 7

What are the 2 causes of hypercapnia?

Answer 7

hypoventilation and V/Q mismatch

Question 8

_______ is the only cause of hyoxemia in which the PaO2 does not rise to the normal level when the patient is given 100% O2.

Answer 8

Shunt

Question 9

What is the reason for normal PaCO2, but hypoxemia when pts with V?Q mismatch hyperventilate?

Answer 9

different shapes of CO2- and O2- dissociation curves