Although the aerosol plume generated by a soft mist inhaler is slower than an MDI, one of the biggest challenges with using an inhaler alone is proper inhalation technique. In order to get the most from an inhaler, whether a traditional metered dose or soft mist inhaler, the patient must begin inhaling before they press the inhaler and continue to inhale long enough to get the medication to their lungs. AEROCHAMBER PLUS FLOW-VU aVHC is the FIRST valved holding chamber FDA Cleared for use with Soft Mist Inhalers.