Deck 5: Oxygenation Assessments

Question 1

A condition that will cause anemic hypoxia is:

A) cyanide poisoning.
B)decreased cardiac output or heart failure.
C)polycythemia.
D)carbon monoxide poisoning.

Answer 1

carbon monoxide poisoning.

Question 2

Polycythemia:
1) is a condition of too many red blood cells.
2) is a condition of too few red blood cells.
3) is caused by lack of iron in the diet.
4) is the body's response to chronic hypoxemia.

A)1, 2
B)2, 3
C)1, 4
D)2, 4

Answer 2

1, 4

Question 3

A sample of blood has been taken from a patient's pulmonary artery. What mixed venous oxygen saturation value (SvO₂) would indicate that the patient is normal?

A) 40 mm Hg
B)95 mm Hg
C)75%
D)97%

Answer 3

75%

Question 4

When a sample of arterial blood is analyzed for the pressure of oxygen (PaO₂) and carbon dioxide (PaCO₂) the value comes from the:

A) blood plasma.
B)leukocytes.
C)hemoglobin.
D)erythrocytes.

Question 5

An increased cardiac output causes the:
1) C(a-v)O₂ to decrease.
2) SvO₂ to increase.
3) Total O₂ delivery to decrease.
4) O₂ER to increase.

A)1
B)2, 3
C)3, 4
D)1, 2

Question 6

Your patient has a chronic respiratory disorder and vasoconstriction of her pulmonary vascular system. What is the chief control over this vasoconstriction?

A) Low PAO₂
B)Low PaO₂
C)High PaCO₂
D)High pH

Question 7

Oxygen consumption:
1) increases with exercise.
2) is the amount of oxygen used by the body.
3) is inversely related to carbon dioxide production.
4) is about 250 mL/min in the resting adult.

A)1, 2
B)3, 4
C)2, 4
D)1, 2, 4

Question 8

A condition that will cause hypoxic hypoxia is:

A) cyanosis.
B)decreased cardiac output or heart failure.
C)hypoventilation from an overdose of a sedative medication.
D)carbon monoxide poisoning.

Question 9

Your patient has been exposed to carbon monoxide during a house fire. How should the patient's PaO₂ value be interpreted?

A) Accurate oxygenation reading
B)Higher than actual oxygenation reading
C)False normal oxygenation reading
D)It should match the CO₂ value.

Question 10

A person's C(a-v)O₂ increases in all of the following situations EXCEPT:

A) seizures.
B)peripheral shunting.
C)hyperthermia.
D)exercise.