In EMS practice, oxygen should be administered under what condition?

• A. All patients with chest pain receive 100% oxygen regardless of saturation
• B. Only when hypoxemia is suspected or saturation is low according to protocol
• C. Oxygen is never indicated in EMS care
• D. Oxygen should be given only to patients with COPD without monitoring

Answer: (B)

The key idea is that oxygen therapy in EMS is targeted: give oxygen when there is evidence of inadequate oxygenation, not to everyone by default. The most accurate choice says to administer oxygen only when hypoxemia is suspected or when the patient’s saturation is low according to protocol. This approach relies on pulse oximetry and clinical signs to guide treatment, and it helps avoid unnecessary high flow oxygen, which can be harmful in some patients.

In practice, you titrate oxygen to a safe SpO2 target and use the appropriate delivery device, monitoring the patient continuously. COPD patients, for example, often require a lower target range (to avoid CO2 retention), while the general target for many patients is roughly 94–98%. The other options imply universal 100% oxygen for all chest pain, no oxygen in EMS at all, or giving oxygen only to COPD patients without monitoring, all of which conflict with evidence-based, patient-specific care and safety: therapy should be guided by oxygen saturation and overall clinical status, with monitoring and adjustment as needed.