No authority that we are aware of denies the importance of inhalation technique in lung penetration and deposition of aerosol mists or powders. As to technique, one commonly hears vague descriptive terms such as "slow" or "fast" or "deep" or "steady," and at least one manufacturer advocates watching their collapsible breathing reservoir for "biofeedback." These vague descriptions can hardly be considered scientific or satisfactory.
While some specifics have been defined (e.g. the inspiratory flow rate during Metered Dose Inhaler use), generally speaking, aerosol / powder inspiration instructions as generally practiced are vague and poorly defined.
The Sierra Biotechnology products permit detailed and comprehensive instructions for mist or powder inhalation.
See the section Biofeedback Incentive Systemtm for general methodology to control breathing, which could also be applied to aerosol (or powder) treatments.
Go to Biofeedback Incentive System
See pictures of the free download BIS-T1 system Go to Pictures