Chapter 38 Medical Gas Therapy

Chapter 38  Medical Gas Therapy

Complete Chapter Questions And Answers
 

Sample Questions

MULTIPLE CHOICE

1. Specific clinical objectives of oxygen (O2) therapy include which of the following?
1. decrease the symptoms caused by chronic hypoxemia
2. decrease the workload hypoxemia imposes on the heart and lungs
3. correct documented arterial hypoxemia
a.
1 and 2
b.
2 and 3
c.
1 and 3
d.
1, 2, and 3

ANS: D
Specific clinical objectives of O2 therapy are to (1) correct documented or suspected acute hypoxemia, (2) decrease the symptoms associated with chronic hypoxemia, and (3) decrease the workload hypoxemia imposes on the cardiopulmonary system.

DIF: Recall REF: p. 910 OBJ: 1

2. Properly applied O2 therapy can decrease which of the following?
1. ventilatory demand
2. work of breathing
3. cardiac output
a.
2 and 3
b.
1 and 2
c.
1, 2, and 3
d.
1 and 3

ANS: C
In cases of acute hypoxemia, supplemental O2 can decrease demands on both the heart and the lungs.

DIF: Recall REF: p. 910 OBJ: 1

3. Benefits of properly applied O2 therapy in patients with chronic hypoxemia include all of the following except:
a.
reversal of pulmonary vasoconstriction
b.
relief of pulmonary hypertension
c.
decreased right ventricular workload
d.
improved pulmonary using capacity

ANS: D
Oxygen therapy can reverse pulmonary vasoconstriction and decrease right ventricular workload.

DIF: Recall REF: p. 910 OBJ: 1

4. Which of the following would indicate a need for O2 therapy for an adult or child?
1. SaO2 less than 90%
2. PaCO2 greater than 45 mm Hg
3. PaO2 less than 60 mm Hg
a.
2 and 3
b.
1 and 2
c.
1, 2, and 3
d.
1 and 3

ANS: D
Excerpts from the AARC guideline on O2 therapy in acute care hospitals appear in CPG 38-1.

DIF: Application REF: p. 911 OBJ: 1

5. You start a chronic obstructive pulmonary disease (COPD) patient on a nasal O2 cannula at 2 L/min. What is the maximum time that should pass before assessing this patient’s PaO2 or SaO2?
a.
2 hours
b.
8 hours
c.
12 hours
d.
72 hours

ANS: A
Excerpts from the AARC guideline on O2 therapy in acute care hospitals appear in CPG 38-1.

DIF: Application REF: p. 911 OBJ: 1