Oxygen Therapy and Respiratory Care
Exam Test With Correct Verified And
Well Analyzed Answers Graded A+ |
2026 Latest Update!!!
Which device delivers the highest concentration of oxygen to a
spontaneously breathing patient?
A. Nasal cannula
B. Simple face mask
C. Nonrebreather mask
D. Venturi mask
Answer: C. Nonrebreather mask
Rationale: A nonrebreather mask can deliver up to 90–100% oxygen
when the reservoir bag remains inflated. It is commonly used in
emergencies when a patient requires high concentrations of oxygen
quickly. Nasal cannulas and simple masks provide lower oxygen
concentrations, while Venturi masks deliver precise oxygen
concentrations rather than the highest amount.
2. A nurse is caring for a patient with chronic obstructive
pulmonary disease (COPD). Which oxygen flow rate is
generally prescribed initially for this patient?
,A. 10–15 L/min
B. 6–8 L/min
C. 1–2 L/min
D. 15–20 L/min
Answer: C. 1–2 L/min
Rationale: Patients with COPD are at risk for carbon dioxide
retention. Low-flow oxygen therapy, usually 1–2 L/min, is often
prescribed to maintain adequate oxygenation without suppressing
respiratory drive. High oxygen flow rates may worsen hypercapnia in
some COPD patients.
3. Which assessment finding indicates hypoxia?
A. Bradycardia
B. Cyanosis
C. Hypertension
D. Warm, flushed skin
Answer: B. Cyanosis
Rationale: Cyanosis is a bluish discoloration of the skin and mucous
membranes caused by insufficient oxygenation. Other signs of hypoxia
include restlessness, confusion, tachycardia, and dyspnea.
Bradycardia and warm flushed skin are not early indicators of
hypoxia.
4. Which oxygen delivery device provides the most precise oxygen
concentration?
A. Nasal cannula
B. Venturi mask
C. Partial rebreather mask
D. Simple face mask
Answer: B. Venturi mask
, Rationale: The Venturi mask delivers a precise and controlled oxygen
concentration by mixing oxygen with room air. It is commonly used
for patients with COPD who require accurate oxygen delivery.
5. A patient receiving oxygen by nasal cannula complains of dry
nasal passages. Which intervention should the nurse
implement?
A. Increase the oxygen flow rate
B. Apply petroleum jelly to the nostrils
C. Add humidification to the oxygen system
D. Discontinue oxygen therapy
Answer: C. Add humidification to the oxygen system
Rationale: Humidification helps prevent dryness and irritation of the
nasal mucosa during oxygen therapy. Petroleum jelly should not be
used because it is flammable in the presence of oxygen.
6. Which action is most important when caring for a patient
receiving oxygen therapy?
A. Keep the patient in a supine position
B. Avoid monitoring oxygen saturation
C. Eliminate all potential ignition sources
D. Restrict oral fluids
Answer: C. Eliminate all potential ignition sources
Rationale: Oxygen supports combustion, increasing fire risk.
Smoking, open flames, and electrical sparks must be avoided near
oxygen equipment to ensure patient safety.
7. Which finding indicates that suctioning has been effective?
A. Increased wheezing
B. Decreased oxygen saturation
Exam Test With Correct Verified And
Well Analyzed Answers Graded A+ |
2026 Latest Update!!!
Which device delivers the highest concentration of oxygen to a
spontaneously breathing patient?
A. Nasal cannula
B. Simple face mask
C. Nonrebreather mask
D. Venturi mask
Answer: C. Nonrebreather mask
Rationale: A nonrebreather mask can deliver up to 90–100% oxygen
when the reservoir bag remains inflated. It is commonly used in
emergencies when a patient requires high concentrations of oxygen
quickly. Nasal cannulas and simple masks provide lower oxygen
concentrations, while Venturi masks deliver precise oxygen
concentrations rather than the highest amount.
2. A nurse is caring for a patient with chronic obstructive
pulmonary disease (COPD). Which oxygen flow rate is
generally prescribed initially for this patient?
,A. 10–15 L/min
B. 6–8 L/min
C. 1–2 L/min
D. 15–20 L/min
Answer: C. 1–2 L/min
Rationale: Patients with COPD are at risk for carbon dioxide
retention. Low-flow oxygen therapy, usually 1–2 L/min, is often
prescribed to maintain adequate oxygenation without suppressing
respiratory drive. High oxygen flow rates may worsen hypercapnia in
some COPD patients.
3. Which assessment finding indicates hypoxia?
A. Bradycardia
B. Cyanosis
C. Hypertension
D. Warm, flushed skin
Answer: B. Cyanosis
Rationale: Cyanosis is a bluish discoloration of the skin and mucous
membranes caused by insufficient oxygenation. Other signs of hypoxia
include restlessness, confusion, tachycardia, and dyspnea.
Bradycardia and warm flushed skin are not early indicators of
hypoxia.
4. Which oxygen delivery device provides the most precise oxygen
concentration?
A. Nasal cannula
B. Venturi mask
C. Partial rebreather mask
D. Simple face mask
Answer: B. Venturi mask
, Rationale: The Venturi mask delivers a precise and controlled oxygen
concentration by mixing oxygen with room air. It is commonly used
for patients with COPD who require accurate oxygen delivery.
5. A patient receiving oxygen by nasal cannula complains of dry
nasal passages. Which intervention should the nurse
implement?
A. Increase the oxygen flow rate
B. Apply petroleum jelly to the nostrils
C. Add humidification to the oxygen system
D. Discontinue oxygen therapy
Answer: C. Add humidification to the oxygen system
Rationale: Humidification helps prevent dryness and irritation of the
nasal mucosa during oxygen therapy. Petroleum jelly should not be
used because it is flammable in the presence of oxygen.
6. Which action is most important when caring for a patient
receiving oxygen therapy?
A. Keep the patient in a supine position
B. Avoid monitoring oxygen saturation
C. Eliminate all potential ignition sources
D. Restrict oral fluids
Answer: C. Eliminate all potential ignition sources
Rationale: Oxygen supports combustion, increasing fire risk.
Smoking, open flames, and electrical sparks must be avoided near
oxygen equipment to ensure patient safety.
7. Which finding indicates that suctioning has been effective?
A. Increased wheezing
B. Decreased oxygen saturation
