A 70-year-old male with a history of COPD is experiencing an acute exacerbation. He is alert and oriented but experiencing significant shortness of breath. His SpO2 is 88% on room air. What is the most appropriate initial oxygen administration strategy for this patient?
- ABag-valve mask ventilation
- BNon-rebreather mask at 15 LPM
- CVenturi mask at 28% concentration
- DNasal cannula at 2-4 LPM
Show answer & explanationAnswer & explanation
Correct answer: D. Nasal cannula at 2-4 LPM
For COPD patients experiencing an exacerbation, the goal is to carefully administer oxygen to improve saturation without completely suppressing their hypoxic drive. An SpO2 of 88% warrants oxygen, but starting with a low-flow device like a nasal cannula at 2-4 LPM is appropriate. This allows for gradual increase or adjustment based on SpO2 response, aiming for an SpO2 target of 88-92%. A non-rebreather mask might deliver too much oxygen too quickly, potentially worsening CO2 retention, while a Venturi mask would be a good next step if the nasal cannula is insufficient but starting with the least invasive, controlled method is preferred.
Why the other options are wrong
- A. Bag-valve mask ventilation is for patients with inadequate breathing or apnea, not for an alert patient experiencing an exacerbation.
- B. A non-rebreather mask delivers high-flow, high-concentration oxygen, which can suppress the hypoxic drive in COPD patients and worsen hypercapnia.
- C. A Venturi mask provides precise oxygen concentrations and is a good option if initial low-flow nasal cannula is insufficient, but it's not typically the very first step in an alert, breathing patient.
Oxygen for COPD Exacerbation
For COPD patients in exacerbation, administer oxygen cautiously, starting with low-flow devices like a nasal cannula to maintain an SpO2 target of 88-92% and avoid suppressing the hypoxic drive.
- Target SpO2: 88-92%.
- Start with low-flow oxygen (nasal cannula 2-4 LPM).
- Avoid excessive oxygen to prevent CO2 retention and loss of hypoxic drive.
Memory trick: COPD patient, low and slow, watch the O2 flow.