BALOON FOR BALLOON CATHETER AND BALLOON CATHETER HAVING THE SAME

• Main Authors: MATSUFUJI KAZUKI, KOJIMA MASAHIRO, NAKANO YOSHIKI, TSUETA MASATO
• Format: Patent
• Language: English; Japanese
• Published: 29.05.2024
• 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 balloon for a balloon catheter in which an expansion efficiency of a narrow part is improved by easily maintaining an expansion force of the balloon, and when an inner pressure is applied by introducing fluid into a lumen of the balloon after being delivered to a lesioned part, the balloon is prevented from being damaged due to an improved pressure-resistance.SOLUTION: A balloon (20) for a balloon catheter includes a first layer (20a) and a second layer (20b) made of a material having higher Shore D hardness than that of the first layer (20a). The second layer (20b) is provided 360° in the whole peripheral direction z1. The first layer (20a) is positioned inside a radial direction y1 with resect to the second layer (20b). On a cross-section vertical with respect to a longitudinal axial direction x1, there are provided: at least one first part (21) made of the first layer (20a) and the second layer (20b); and at least one second part (22) solely made of the second layer (20b). The range in which the second part (22) is provided in the peripheral direction z1 is 90°or less of the 360° in the peripheral direction z1.SELECTED DRAWING: Figure 2 【課題】バルーンの拡張力を容易に保つことにより狭窄部の拡張効率を向上でき、病変部に送達後バルーンの内腔に流体を導入して内圧をかけた際にバルーンが破損しにくく耐圧性の向上したバルーンカテーテル用バルーンを提供する。【解決手段】第１層（２０ａ）と、第１層（２０ａ）よりもショアＤ硬度が高い材料から構成されている第２層（２０ｂ）とを有しており、第２層（２０ｂ）は、周方向ｚ１の３６０°全体にわたって配されており、第１層（２０ａ）は、第２層（２０ｂ）よりも径方向ｙ１の内側に位置しており、長手軸方向ｘ１に垂直な断面において、第１層（２０ａ）と第２層（２０ｂ）とからなる少なくとも１つの第１部（２１）と、第２層（２０ｂ）のみからなる少なくとも１つの第２部（２２）とを有しており、周方向ｚ１において第２部（２２）が配されている範囲は周方向ｚ１の３６０°のうち９０°以下であるバルーンカテーテル用バルーン（２０）。【選択図】図２