describing aerosolized pharmaceutical preparations and delivery devices for an aerosolized or sprayed salt solution, such as a sodium chloride solution, of particle size up to about 10 micron, for administration via respiratory airways for treatment of respiratory, airway and pulmonary diseases and conditions, such as airway dryness, airway dehydration, asthma and associated symptoms including bronchoconstriction, difficult breathing, wheezing, pulmonary vasoconstriction, allergic rhinitis, allergic bronchitis, pulmonary hypertension, pulmonary vasoconstriction, impeded or obstructed lung airways, respiratory tract allergies and inflammation, more particularly for use in testing, diagnostic, preventive and therapeutic applications included