Pressurized metered dose inhaler distribution

Metered-dose inhalation aerosols Delivered dose per actuation, number of metered doses, color, particle-size distribution, loss of propellant, pressure, valve corrosion, spray pattern, and absence of pathogenic microorganisms... 

Baeckstroem K, Nilsson PG. Measurements of droplet size distributions from metered dose inhalers with different vapor pressures and contents of surfactant. J Aerosol Sci 1988 19(7) 1097-1100. 

Metered-Dose Inhalation Aerosols Quantity of delivered dose, total number of acceptable doses delivered, color, solvate formation with propellant, particle size distribution, weight loss of canister (i.e., loss of propellant), pressure, valve corrosion, and storage in both upright and inverted positions. 

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