Artificial nose also called warm wet exchange filter (HME), is a filtration device made of several layers of gauze of pore structure of absorbent material and hydrophilic compounds, which can simulate the function of the nose, the exhaled gas in the heat and moisture are collected and preserved, inhale the gas through the artificial nose, with warm, wet state to ensure the airway, airway humidification was effective and appropriate; at the same time, it has a certain degree of filtration of bacteria, can reduce the risk of bacterial contamination by pipeline.
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