Practice Question
A patient with chronic hypercarbia is receiving oxygen therapy for hypoxemia. The nurse adjusts the oxygen flow to maintain an oxygen saturation greater than 90% while avoiding complications from excessive FiO.. Which oxygen delivery system is most appropriate for this patient at this time?
Answer Choices:
Correct Answer:
Nasal cannula at 2-4 L/min
Rationale:
🟩 Patients with chronic hypercarbia (e.g., COPD) require low-flow oxygen to avoid suppressing their hypoxic drive to breathe.
🟩 A nasal cannula at 2–4 L/min provides enough oxygen to maintain saturations >90% without causing dangerous CO₂ retention.
🟩 High-flow devices (simple masks, NRBs, partial rebreathers) deliver too much oxygen and risk worsening hypercapnia.
🟩 Controlled, titrated oxygen is the safest method for stabilizing this population.
❌ A/B/C — All deliver high oxygen concentrations → dangerous CO₂ narcosis risk.
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This question is from EXAMPLIFY NUR 105 EXAM 3 FALL 2025 which contains 50 questions.
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Question Details
- Category: RN Nursing Exam(s)
- Subcategory: Examplify Exam(s)
- Domain: Medical-Surgical
- Answer Choices: 4