Nasal septal perforation (NSP) remains a problem, and treatment of it is still controversial. NSP leads not only to disturbances in the NC aerodynamics, but also to disturbances in warming and moistening of the inhaled air. By using the computational fluid dynamics (CFD) method, we evaluate disturbances in warming and moistening of the inhaled air in cases of NSP. We emphasize that an adverse effect of NSP begins with a disorder of air heating and moisturizing, and believe that a NSP must and can be closed as early as it is possible.

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