PROBLEM TO BE SOLVED: To provide a dilation catheter capable of guiding an expansion body precisely and easily into a narrow section irrespective of the difference of an introduction route for introducing an expansion body for expanding a narrow section in an organism and the individual difference of the anatomy of each patient.SOLUTION: A balloon catheter 100 comprises: a first long body 110 made flexible and capable of being introduced into an organism formed with an axially extending insertion lumen 111 and a second long body 120 including: a holding part 150 disposed in the first long body for holding the outer shape of the first long body in the organism, in such an outer shape that at least a portion of the first long body is bent in a direction for at least a portion of the first long body to intersect the axial direction a balloon 130 and an imaging part 140, so that the second long body can move in the insertion lumen of the first long body having an outer shape held by the holding part.COPYRIGHT: (C)2015,JPO&INPIT【課題】生体内において狭窄部を拡張する拡張体を導入する導入経路の相違や患者ごとの解剖学的構造の個体差に関わらず、正確かつ簡単に狭窄部へ拡張体を案内することが可能な拡張カテーテルを提供する。【解決手段】バルーンカテーテル100は、可撓性が備えられるとともに軸方向に伸びる挿通ルーメン111が形成された生体内に導入可能な第1の長尺体110と、第1の長尺体に設けられ、生体内において第1の長尺体の外形形状を当該第1の長尺体の少なくとも一部が軸方向と交差する方向に曲げられた外形形状に保持する保持部150と、バルーン130および撮像部140を備え、保持部によって外形形状が保持された第1の長尺体の挿通ルーメン内を移動可能な第2の長尺体120と、を有する。【選択図】図2
