PROBLEM TO BE SOLVED: To provide an apparatus for injecting medication, therapeutic agents, and the like efficiently and effectively into blood vessel walls, body cavity walls, duct walls, etc.SOLUTION: The apparatus for injecting medication into the walls of internal passages and the like includes a catheter which has at least one lumen and one end and passes through internal passages to a treated location, an inflatable lengthy balloon disposed in the lumen near the end of the catheter, at least one lengthy tubular rail with a plurality of side-outward projected needles for receiving medication disposed parallel as a whole in one side of the balloon, a balloon inflating means connected to the balloon via the lumen to selectively inflate the balloon when the needle is punctured into the neighboring wall by outward pressing the tubular rail by the balloon pushed out from the end of the catheter, and a medication sending supply means connected to the tubular rail via the lumen to send and supply the medication not only to the tubular rail but also to the needle and the outside thereof.COPYRIGHT: (C)2008,JPO&INPIT【課題】薬物、治療薬等を血管壁、体腔壁、導管壁等に効率的かつ有効に注射する装置を提供する。【解決手段】体内通路等の壁に薬物を注射する装置は、少なくとも1つのルーメンと末端を有し、体内通路を治療部位まで通り抜けるカテーテルと、カテーテルの末端近傍のルーメン内に配置された膨張可能な長尺のバルーンと、バルーンの一側に全体として平行に設けられ、側方外側に突出する複数の針を備え、薬物を受け入れる少なくとも1つの長尺の管状レールと、ルーメンを介してバルーンに連結され、バルーンがカテーテルの末端から押し出されて管状レールを外側に押しやることによって針を隣接する壁に刺す時にバルーンを選択的に膨張させるバルーン膨張手段と、ルーメンを介して管状レールに連結され、薬物を管状レールに、ひいては、針そしてその外部に送給する薬物送給手段とを備えている。【選択図】図7A
