| 摘要 |
A method of administering a drug whereby a fine drug powder can be accurately administered to a target site (in particular, a target site in the body cavity) via fluidization and spraying with a gas by using a microtube. Concerning the administration mode, in particular, the drug alone or a biopolymer is administered or the biopolymer is employed as a carrier in the above method. More specifically speaking, a method of administering a fine drug powder which comprises finely milling one or more types fine particles of the drug and/or the biopolymer, blending them each other, fluidizing the blend with a gas, then transporting the fluidized matter in a microtube by the gas stream and spraying the fine drug powder from the tip of the microtube toward the target site. Further, an administration method which comprises concentrically providing a capillary tube in the microtube, supplying an aqueous solution of the drug and/or the biopolymer from the capillary tube into the gas stream and then mixing it with other fine particles of the drug and/or the biopolymer under transportation by the gas. |
