| 摘要 |
PCT No. PCT/GB91/02117 Sec. 371 Date Apr. 22, 1993 Sec. 102(e) Date Apr. 22, 1993 PCT Filed Nov. 29, 1991 PCT Pub. No. WO92/10229 PCT Pub. Date Jun. 25, 1992.A powder inhalation device includes a powder reservoir which contains a powdered medicament and a volume of air. The volume of air is disposed between an upper surface of the powdered medicament and a cover member of the powder reservoir. A metering chamber extends from the powder reservoir, and an apparatus is included for compressing the volume of air within the reservoir. A passage extending from the reservoir to the atmosphere is provided to allow air to vent from the powder reservoir, through the metering chamber, and into the atmosphere as the pressure of the volume of air in the powder reservoir is increased by the compressing apparatus. The volume of air thereby causes the powdered medicament to be forced into the metering chamber, and through a selectively openable barrier into an inhaling chamber. |
