The venturi inner mask is a special oxygen mask with a venturi device that mixes oxygen with room air to produce high flow oxygen enrichment. They are high-flow oxygen therapy medical devices that provide patients with precise oxygen concentrations. It is the main treatment method for transporting oxygen, especially when it is necessary to control carbon dioxide retention. The venturi inner cover is usually designed to accurately deliver 24%, 28%, 31%, 25% and 40% oxygen. The venturi inner mask is particularly used to prevent respiratory depression in emphysema patients who cannot fully inhale.


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