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Venturi mask explained The venturi mask , also known as an air-entrainment mask , is a medical device to deliver a known oxygen concentration to patients on controlled oxygen therapy. [1] [2] The mask was invented by Moran Campbell at McMaster University Medical School as a replacement for intermittent oxygen treatment. Dr. A venturi mask is a medical device used to deliver a precise concentration of oxygen to patients who require oxygen therapy. It is designed to provide an accurate FiO2 (fraction of inspired oxygen) level and is commonly used in medical settings. From: Clinical Skills for Nursing Practice [2019], Pneumocystis jirovecii pneumonia in an immunocompetent patient recovered from COVID-19 [2021] It is a medical device for delivering a known oxygen concentration to patients on controlled oxygen therapy. The Venturi mask is also known as an air entrainment mask . Learn about Venturi masks, a type of oxygen delivery device that works based on the Venturi effect. Compare their strengths and weaknesses, and discover a new and powerful alternative: Oxy2Mask, a simple and comfortable mask that delivers precise oxygen levels.