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Understanding Arterial Blood Gases

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

Which of the following is NOT typically measured in an ABG analysis?

a)

pH

b)

PaCO2

c)

Hemoglobin

d)

HCO3

2.

What is the normal reference range for arterial pH in adults?

a)

7.00–7.20

b)

7.35–7.45

c)

7.50–7.60

d)

7.75–8.75

3.

What is the normal reference range for arterial PaO2 in adults?

a)

50–70 mmHg

b)

35–45 mmHg

c)

80–100 mmHg

d)

120–140 mmHg

4.

Which component of the ABG reflects the respiratory function of the lungs?

a)

PaO2

b)

PaCO2

c)

HCO3

d)

pH

5.

Which of the following conditions is most likely to cause a decreased PaO2 on ABG?

a)

Hyperventilation

b)

Pulmonary embolism

c)

Metabolic acidosis

d)

Renal failure

6.

If a patient has a low pH, low HCO3, and low PaCO2, what is the most likely primary disturbance?

a)

Metabolic acidosis

b)

Respiratory acidosis

c)

Metabolic alkalosis

d)

Respiratory alkalosis

7.

A patient’s ABG shows: pH = 7.30, PaCO2 = 50 mmHg, HCO3 = 24 mEq/L. Which acid-base disturbance is present?

a)

Metabolic acidosis

b)

Respiratory acidosis

c)

Metabolic alkalosis

d)

Respiratory alkalosis

8.

A patient’s ABG results are: pH = 7.48, PaCO2 = 32 mmHg, HCO3 = 23 mEq/L. What is the most likely diagnosis?

a)

Metabolic acidosis

b)

Respiratory acidosis

c)

Metabolic alkalosis

d)

Respiratory alkalosis

9.

A patient presents with confusion and rapid breathing. ABG shows: pH = 7.25, PaCO2 = 28 mmHg, HCO3 = 12 mEq/L. What is the most likely underlying cause?

a)

Diabetic ketoacidosis

b)

Opioid overdose

c)

Panic attack

d)

Vomiting

10.

A patient’s ABG shows: pH = 7.50, PaCO2 = 48 mmHg, HCO3 = 36 mEq/L. What is the most likely acid-base disturbance and its compensation status?

a)

Metabolic alkalosis with partial respiratory compensation

b)

Respiratory alkalosis with partial metabolic compensation

c)

Metabolic acidosis with full respiratory compensation

d)

Respiratory acidosis with full metabolic compensation