| abstract |
A dry powder inhaler for transpulmonary administration used for making a freeze-dried composition that has been housed in non-powder form in a vessel (1) into fine particles by an air impact, and administering the resulting fine particles to a user by inhalation, ncomprising a needle part (5) having an air jet flow path (3), a needle part (5) having a discharge flow path (4), air pressure-feeding means (9) for feeding air into the air jet flow path (3) of said needle part (5), and an inhalation port (6) that communicates with the discharge flow path (4) of said needle part (5), nand being constituted such that a stopper (1a) that seals up said vessel (1) is pierced by said needle parts (5), thus communicating the air jet flow path (3) and the discharge flow path (4) with the inside of said vessel (1), and air is jetted into said vessel (1) through said air jet flow path (3) using said air pressure-feeding means (9), thus making said freeze-dried composition (2) into fine particles by the impact of the jetted air, and discharging the fine particles from the inhalation port (6) via said discharge flow path (4). |