PROBLEM TO BE SOLVED: To provide a balloon catheter which remarkably reduces the resistance thereof when making a balloon to pass through a blood vessel stenosis region and when taking out the balloon to the outside of the body, and never damages a normal blood vessel when making the balloon to pass through the blood vessel stenosis region while the balloon is expanded or constricted, by stably folding the balloon around a catheter shaft so as to miniaturize it when constricting the balloon.SOLUTION: The distal end of the catheter shaft is connected with the balloon comprising: a straight tube distal-side and proximal-side tapered parts which are adjacent to both ends of the straight tube and which gradually reduce in diameters and distal-side and proximal-side sleeve parts which are adjacent to both ends of the tapered parts. In the medical balloon catheter, the boundaries between the tapered parts and the straight tube have a waved shape by periodically changing the inclination angles of the tapered parts through a peripheral direction.COPYRIGHT: (C)2010,JPO&INPIT【課題】 バルーン収縮時、バルーンをカテーテルシャフトの周りに安定的に折畳み、小型化することにより、血管狭窄部位を通過させる際、バルーンを体外に取り出す際の抵抗を大幅に低減し、またバルーン拡張状態、または収縮状態で血管狭窄部位を通過させる際に正常な血管を損傷させるおそれがないバルーンカテーテルを提供する。【解決手段】 カテーテルシャフトの遠位端に、直管部と、この直管部の両端に隣接し漸次縮径する近位側および遠位側テーパー部と、これらテーパー部両端に隣接する近位側および遠位側スリーブ部を有してなるバルーンを接合し、前記テーパー部の傾斜角度を周方向に亘って周期的に変化させることにより、当該テーパー部と前記直管部の境界が波形状となる医療用バルーンカテーテルを構成した。【選択図】 図1
