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 protrusion 23 on the surface; a process for preparing a first metal mold having a balloon-shaped lumen and in which a concave part is formed on the inner wall surface; a first molding process (B) for expanding the resin tubular body 21 in the first metal mold and causing the protrusion 23 of the resin tubular body 21 to enter the concave part on the inner wall surface of the first metal mold to acquire an intermediate mold 41 having the protrusion 23 on the surface; a process (C) for removing part of the protrusion 23 of the intermediate mold 41; a process for preparing a second metal mold having a balloon-shaped lumen and formed with a concave part on the internal wall surface; and a second molding process (D) for expanding the intermediate mold 41 in the second metal mold and causing the protrusion 23 of the intermediate mold 41 to enter the concave part on the inner wall surface of the second 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】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、バルーン形状の内腔を有し、内壁面に凹部が形成された第１金型を準備する工程と、第１金型内で樹脂管状体２１を膨張させるとともに樹脂管状体２１の突起２３を第１金型の内壁面の凹部に入り込ませ、表面に突起２３を有する中間成形体４１を得る第１成形工程（Ｂ）と、中間成形体４１の突起２３の一部を切除する工程（Ｃ）と、バルーン形状の内腔を有し、内壁面に凹部が形成された第２金型を準備する工程と、第２金型内で中間成形体４１を膨張させるとともに中間成形体４１の突起２３を第２金型の内壁面の凹部に入り込ませる第２成形工程（Ｄ）とを有するバルーンカテーテルの製造方法。【選択図】図５