A consideration of nasal, pulmonary and cardio-vascular interdependance and nasal-pulmonary function studies.

Timed vital capacity of one second, peakflow, maximum breathing capacity (maximum voluntary ventilation), maximum middle half flow rate, total vital forced expiratory and inspiratory capacities, tidal and minute volume tested via the mouth and each "nose" separately for the diagnosis of nasal airway disturbance have proved to be valuable parameters of pulmonary function for the evaluation of the degree to which each nasal chamber "loads" the effort of breathing every breath in and out of the nose. Minimum "normal" ratios of nose to mouth finding have been determined. Calculations falling below these normals indicate strongly the presence of significant nasal airway disturbance. Especially is this true when repeated testing yields constant similar results.