When should a paramedic begin high-flow oxygen therapy?

High-flow oxygen therapy plays a crucial role in the management of patients experiencing hypoxia or respiratory distress. This intervention is particularly vital when a patient's oxygen saturation levels are significantly low or when they demonstrate signs of respiratory compromise, like labored breathing or altered mental status due to inadequate oxygenation.

Beginning high-flow oxygen therapy in these scenarios helps to swiftly improve the patient's oxygenation, thereby supporting vital organ functions and preventing further complications. The use of oxygen is a standard protocol in emergency care settings, where timely intervention can make a significant difference in patient outcomes.

Other options do not appropriately reflect the critical circumstances under which high-flow oxygen should be administered. While an assessment of the patient is crucial, initiating high-flow oxygen therapy is often warranted without delay in suspected cases of hypoxia, making it a priority intervention prior to or concurrently with the assessment process.