CATHETER

• Main Authors: OGIDO MORITAKA, KATSURADA TAKEJI
• Format: Patent
• Language: English; Japanese
• Published: 02.08.2021
• 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 catheter which can improve bonding strength between a hollow shaft and a core wire while maintaining excellent pushing-in property inside a body.SOLUTION: A catheter 1 includes: a hollow shaft 11 in which a plurality of resin layers are laminated including a first resin layer 111 and a second resin layer 112 provided on an inner periphery of the first resin layer 111; and a core wire 21 bonded to an inner periphery of the hollow shaft 11 and having at least one through hole 21h. A melting viscosity of resin 112m composing the second resin layer 112 is smaller than a melting viscosity of resin 111m composing the first resin layer 111, and at least a part of the second resin layer 112 enters into the through hole 21h.SELECTED DRAWING: Figure 1B 【課題】体腔内での良好な押し込み性を維持しつつ、中空シャフトとコアワイヤとの接合強度を向上させることが可能なカテーテルの提供を目的とする。【解決手段】カテーテル１は、第１の樹脂層１１１と、第１の樹脂層１１１の内周に設けられた第２の樹脂層１１２と、を含む複数の樹脂層が積層された中空シャフト１１と、中空シャフト１１の内周に接合され、少なくとも１つの貫通孔２１ｈを有するコアワイヤ２１と、を備え、第２の樹脂層１１２を構成する樹脂１１２ｍの溶融粘度は、第１の樹脂層１１１を構成する樹脂１１１ｍの溶融粘度よりも小さく、第２の樹脂層１１２の一部が貫通孔２１ｈ内に侵入している。【選択図】図１Ｂ