Why particle sizes are important to nebulizer mask?

Nebulizer cup and tubing is another type of aerosol therapy product comparing to the nebulizer mask, there is no PVC mask but a mouthpiece instead. The people have the mouthpiece in the mouth and inhale in & out naturally, the fine particles of the medication will be delivered to infection area through the tracheal. To be easier accepted by the children, there are some cartoon-image nebulizer masks on the market. Do you know what are the most suitable fine particle sizes for an aerosol therapy？ Based on what an international medical expert said, the most suitable fine particles sizes are from 3μm to 5μm, which can reach to the lower respiratory track and even to lung. Sizes larger than 5μm mostly fall at the oral cavity, while sizes smaller than 0.5μm will be exhale out in your breath. The nebulizer face mask set manufactured by us providing fine particle sizes with average diameter of 3.5μm, and the proportion of the different particle sizes as below 1-5μm, not less than…