Why should oxygen therapy be titrated to a target SpO2 rather than maximized?

Why should oxygen therapy be titrated to a target SpO2 rather than maximized?

• A. To maximize SpO2 to 100%.
• B. To tailor therapy while minimizing oxygen use regardless of SpO2.
• C. To avoid oxygen toxicity and hyperoxia and tailor therapy to the patient’s oxygenation needs.
• D. To ensure the patient feels comfortable.

Answer: (C)

Titrating oxygen to a target SpO2 keeps oxygen delivery safe and appropriate for each patient. Pushing for 100% SpO2 or very high FiO2 can cause oxygen toxicity and hyperoxia, which may lead to oxidative stress, absorption atelectasis, and worse ventilation–perfusion mismatch. In some people, especially those with chronic CO2 retention, too much oxygen can even worsen hypercapnia. By aiming for a defined SpO2 range and adjusting FiO2 to stay within it, you provide enough oxygen to meet metabolic needs while avoiding the harms of over-oxygenation and unnecessary oxygen use. In practice, you monitor with pulse oximetry and maintain a target like 92–96% for most patients (or 88–92% in COPD with CO2 retention), then tweak FiO2 up or down as needed. Comfort matters, but it comes from safely meeting oxygen needs without the risks of too much oxygen.

Titrating oxygen to a target SpO2 keeps oxygen delivery safe and appropriate for each patient. Pushing for 100% SpO2 or very high FiO2 can cause oxygen toxicity and hyperoxia, which may lead to oxidative stress, absorption atelectasis, and worse ventilation–perfusion mismatch. In some people, especially those with chronic CO2 retention, too much oxygen can even worsen hypercapnia. By aiming for a defined SpO2 range and adjusting FiO2 to stay within it, you provide enough oxygen to meet metabolic needs while avoiding the harms of over-oxygenation and unnecessary oxygen use. In practice, you monitor with pulse oximetry and maintain a target like 92–96% for most patients (or 88–92% in COPD with CO2 retention), then tweak FiO2 up or down as needed. Comfort matters, but it comes from safely meeting oxygen needs without the risks of too much oxygen.