Flow–Characterization of Oral Cavities for the Mechanical Lung Simulator xPULM

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Mechanical lung simulators play an important role in research into breathing and ventilation processes. They can be used in investigation into the deposition of drugs in the mouth and throat up to the bronchi, if this is simulated mechanically, but is also understood in terms of flow physics. Research in this subject area is complicated by the fact that inhalers generally cannot be examined independently of the rest of the mechanical simulator. We present the testings of flow analysis on two modules of the mouth and throat for the mechanical lung simulator xPULM and show that the degree of turbulence of the flows examined is significantly influenced by the type of inhaler used. The results are obtained through measurements on four different inhalers.