PROBLEM TO BE SOLVED: To provide a core material and a housing tool capable of easily and quickly supplying fluid for flushing to a lumen of a catheter, and holding the catheter appropriately.SOLUTION: A core material 80 inserted into a guide wire lumen 26 of a balloon catheter 10 includes a long-sized hollow tubular part 81 that is open at a first end part 83 and a second end part 84, and a long-sized linear part 82 connected to the second end part 84 of the tubular part 81, which has lower flexural rigidity than the tubular part 81.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】カテーテルのルーメンにフラッシュ用流体を容易かつ迅速に供給でき、かつカテーテルを適切に保持できる芯材および収容具を提供する。【解決手段】バルーンカテーテル10のガイドワイヤルーメン26に挿入される芯材80であって、中空であって第1の端部83および第2の端部84で開口する長尺な管状部81と、管状部81の第2の端部84に連結され、管状部81よりも曲げ剛性が低い長尺な線状部82と、を有する。【選択図】図3
