Oxygen should be administered to patients with heart failure if their oxygen saturation is less than what percentage?

Oxygen should be administered to patients with heart failure if their oxygen saturation is less than 90%. This threshold is based on clinical guidelines, which indicate that maintaining oxygen saturation levels above 90% is essential for ensuring adequate oxygen delivery to tissues. In heart failure, patients often struggle with oxygenation due to pulmonary congestion and respiratory issues, making it necessary to provide supplemental oxygen to prevent complications such as hypoxia.

When oxygen saturation drops below this level, it can lead to increased workload on the heart and exacerbate symptoms of heart failure. Consequently, administering oxygen to maintain saturation at or above 90% helps improve comfort, reduce strain on the heart, and enhance overall patient outcomes. The other percentages listed provide levels that are either too high (potentially delaying necessary treatment) or are not in line with current clinical standards for intervention in heart failure patients.