| abstract |
The invention relates to a device for atomizing preferably powdery medical formulations, wherein atomization is supported by a propellant. According to the invention, the propellant is fed to the powder cavity (1) containing the formulation in a pulsed manner, to which powder cavity the nozzle (3) from which the aerosol escapes is connected. In comparison with the aerosol generation of a commercially available MDI, better coordination of the inhalation behavior of a user with the aerosol generation is possible when the device according to the invention is used as an inhaler due to the extension of the aerosol generation over time resulting from the pulsing. In addition, the emptying of the powder cavity (1) is improved by suitably selecting the length and the time interval of the pulses. The atomization of relatively large amounts of powder in only one use of the atomizer is thus enabled. In addition, the propellant is conducted through an evaporator (6) or heat exchanger before entering the powder cavity (1), whereby the propellant is converted to the gaseous form thereof before the propellant hits the powder. This causes an increase in the proportion of particles that can pass into the lungs in the aerosol escaping from the nozzle (3). |