BALLOON CATHETER MANUFACTURING METHOD

• Main Authors: MATSUFUJI KAZUKI, KOJIMA MASAHIRO, NAKANO YOSHIKI, TSUETA MASATO
• Format: Patent
• Language: English; Japanese
• Published: 13.03.2024
• Subjects: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; HUMAN NECESSITIES; HYGIENE; MEDICAL OR VETERINARY SCIENCE

To provide a manufacturing method of a balloon catheter provided with a protrusion on a surface of a part of the balloon that expands to a relatively large extent when the balloon is inflated.SOLUTION: A manufacturing method of a balloon catheter includes: a process (A) for preparing a resin tubular body 21 having a first section 24 to a fifth section 28 from one side in a longitudinal direction and having protrusions 23 on the surface; a process (B) for extending the resin tubular body 21 in a longitudinal direction so that an extension ratio of the first section 24 and the fifth section 28 is higher than an extension ratio of the second section 25 and the fourth section 27; a process for preparing a metal mold having a balloon-shaped lumen extending in an axial direction and in which a concave part is formed on the inner wall surface forming the lumen; a process (C) for arranging the resin tubular body 21 in the lumen of the metal mold; and a molding process (E) for expanding the second section 25 to the fourth section 27 of the resin tubular body 21 in the metal mold, and causing the protrusion 23 provided on the surface of the resin tubular body 21 to enter the concave part on the inner wall surface of the metal mold.SELECTED DRAWING: Figure 5 【課題】バルーンの表面であって、バルーンを拡張させた際に比較的大きく膨らむ部分の表面に突起部が設けられたバルーンカテーテルの製造方法を提供する。【解決手段】長手方向の一方側から第１区間２４～第５区間２８を有し、表面に突起２３を有する樹脂管状体２１を準備する工程（Ａ）と、第１区間２４と第５区間２８の延伸倍率が第２区間２５と第４区間２７の延伸倍率よりも高くなるように樹脂管状体２１を長手方向に延伸する工程（Ｂ）と、軸方向に延びるバルーン形状を有する内腔を有し、当該内腔を形成する内壁面に凹部が形成された金型を準備する工程と、樹脂管状体２１を金型の内腔に配置する工程（Ｃ）と、金型内で樹脂管状体２１の第２区間２５～第４区間２７を膨張させるとともに樹脂管状体２１の表面に設けられた突起２３を金型の内壁面の凹部に入り込ませる成形工程（Ｅ）とを有するバルーンカテーテルの製造方法。【選択図】図５