High-Flow Oxygen Therapy Guidelines

Target Oxygen Saturation Ranges

• The American Heart Association recommends maintaining SpO2 between 94-98% in most acute care situations, as stated by the American College of Cardiology, for patients with metabolic acidosis and normal PCO2 1
• For post-cardiac arrest patients, the American Heart Association recommends targeting SpO2 of 94-98% or PaO2 of 75-100 mmHg after initial stabilization, as per the guidelines from the American College of Cardiology 1

Critical Monitoring Requirements

• The American College of Cardiology advises avoiding both hypoxemia (SpO2 <90%) and hyperoxemia (SpO2 >98%) to prevent tissue hypoxia and worsening metabolic acidosis 1
• Hyperoxemia has been associated with harm in observational studies, particularly at very high PaO2 values, according to the American Thoracic Society 1

Titration Strategy

• The American College of Cardiology recommends starting with high FiO2 (up to 100%) until reliable oxygen measurements are obtained, then titrating down, as stated by the American Heart Association 1
• The American Thoracic Society suggests using 100% inspired oxygen initially in critically ill patients until arterial oxygen saturation can be measured reliably, then decreasing FiO2 while maintaining SpO2 ≥94% 5

Hemodynamic and Respiratory Monitoring

• The British Society of Anaesthetists recommends ensuring hemodynamic stability (MAP ≥65 mmHg) and lung protection (plateau pressure ≤30 cm H2O) when using mechanical ventilation, as per the guidelines from the American Thoracic Society 6
• The American Thoracic Society advises monitoring dynamic compliance, driving pressure, and plateau pressure continuously to ensure lung protection 6

Common Pitfalls to Avoid

• The American College of Physicians recommends not restricting oxygen to lower targets (88-92%) in patients with normal PCO2, as this can worsen tissue hypoxia and potentially exacerbate metabolic acidosis, according to the American Thoracic Society 3
• The American Heart Association advises not relying on pulse oximetry alone in patients with dark skin pigmentation due to the higher risk of occult hypoxemia, as stated by the American College of Cardiology 1