| 摘要 |
<p>The present invention relates to an inhalation device comprising means for breaking down aggregates of finely divided powdered medicament having a particle size less than 10 'mu'm to provide a finely divided medicament having a large amount of particles within the respiratory range, i.e. having particle sizes less than 10 'mu'm, said means comprise at least one pair of surfaces in a gas/air flow path, the first surface of the pair providing an inlet surface of a constriction in the gas/air flow path whereby the speed of gas/air passing along the flow path through the constriction is increased, and the second surface of the pair is situated at or near the outlet of the constriction and provides an impact surface so that in use aggregates or particles impact said surfaces, and whereby said first and second surfaces are oriented at different angles to the longitudinal direction of the flow path.</p> |
