초록 ▼

A new inhalation device, which during operation causes an aerosol to be formed inside a chamber such as a capsule (4) which occludes one end (3) of the inhalation tube (1), the capsule having holes at its extremities (7,8) which admit airflow. The airflow causes the powder contained inside the capsu

A new inhalation device, which during operation causes an aerosol to be formed inside a chamber such as a capsule (4) which occludes one end (3) of the inhalation tube (1), the capsule having holes at its extremities (7,8) which admit airflow. The airflow causes the powder contained inside the capsule to be surprisingly transported to the capsule extremity contrary to the direction of inhalation, that is towards the air entry holes in the capsule, and then to form an aerosol until all powder has been removed from the capsule or chamber through the tube (1), the during of inhalation being chiefly regulated by the size and proportion of the capsule holes. The tube (1) has air inlets downstream of the capsule to permit a balanced airflow that will transport the finely suspended powder into the lungs, maximizing the fraction of medicament deposited therein.

대표청구항 ▼

A powder medicament inhaler, comprising: an inhalation tube having a first, downstream end for a person to draw air therethrough and a second, upstream end; a medicament holder for holding a quantity of medicament in the form of a fine powder; a holding chamber defined in the inhalation tube upstrea

A powder medicament inhaler, comprising: an inhalation tube having a first, downstream end for a person to draw air therethrough and a second, upstream end; a medicament holder for holding a quantity of medicament in the form of a fine powder; a holding chamber defined in the inhalation tube upstream of the first end for stationarily holding therein said medicament holder relative to said inhalation tube during inhalation; an air inlet in the inhalation tube for admitting a first flow of air in response to the suction of a person inhaling through the first end of the inhalation tube; and means for drawing a second flow of air through said medicament holder and fluidizing said powder within said medicament holder in response to the suction of a person inhaling through the first end of the inhalation tube, said means including at least one air entry hole and at least one air exit hole in the medicament holder, the area of the air entry hole or holes being substantially smaller than the area of said air exit hole or holes so as to cause the powder to fluidize inside the medicament holder; wherein the total area of said air entry holes and air exit holes is configured such that said second flow of air comprises no more than about 20% of the air passing through said inhaler.