Importance of Powder Residence Time for the Aerosol Delivery Performance of a Commercial Dry Powder Inhaler Aerolizer®

Within a certain range, increasing the powder residence time could improve the performance of Aerolizer(®) by increasing the powder-air interaction time (the main reason) and increasing the powder-device compaction (the secondary reason). Combination of high turbulence level and sufficient powder residence time could further improve the device performance.