What FiO2 can an Aerosol Face Mask typically deliver?

An aerosol face mask is designed to deliver a higher concentration of oxygen in combination with aerosolized medications, often used for patients with respiratory distress or conditions that require humidified air. The typical fraction of inspired oxygen (FiO2) that an aerosol face mask can effectively deliver ranges from approximately 40% to 60%. This range occurs because the mask allows for some ambient air mixing with the oxygen, meaning that while it provides significant supplemental oxygen, it's not as concentrated as some specialized delivery devices like a high-flow nasal cannula or a non-rebreather mask, which can deliver higher FiO2 levels.

In certain clinical scenarios, adjusting the flow rate and ensuring a proper fit can help optimize the delivered FiO2. However, it generally remains within this 40-60% range, making it suitable for many patients in a critical care setting who need moderate oxygen supplementation along with therapeutic aerosols.