发明名称 Intravascular catheter and catheter-needle assembly
摘要 <p>An intravascular catheter, an intravascular catheter assembly including such an intravascular catheter, and their production method are provided. The intravascular catheter is provided with a catheter main segment which has excellent resistance to breakage, kink and other damages simultaneously with adequate flexibility, workability of the tip portion, and surface smoothness. In addition, such catheter main segment may be optionally provided with radiopacity with no substantial increase in its wall thickness. The intravascular catheter of the present invention is the catheter used in combination with an inner needle (stylet) in its piercing. The inner needle which had been inserted in the lumen of the catheter is removed after the piercing of the catheter to leave the catheter indwelled in the blood vessel. Therefore, the intravascular catheter has a flexible catheter main segment 2. The catheter main segment 2 comprises an inner layer 4 and an outer layer 6 which are adhered to each other with the intervening reinforcement layer 5. Preferably, the reinforcement layer comprises a braid of reinforcement yarns 51 of a thermoplastic resin, which is produced by winding the reinforcement yarn(s) in spiral fashion in two directions on the exterior surface of the inner layer. The resistance to breakage and kink and the flexibility are ensured at once by adequately selecting the mode of the winding. In addition, thin wall thickness and surface smoothness of the catheter main segment are ensured by partly embedding the reinforcement yarn 51 in the inner layer 4. Preferably, such partial embedding of the reinforcement yarn 51 is realized by a preliminary heating at a predetermined temperature of the reinforcement yarn 51 after its provision on the surface of the inner layer 4 and before the formation of the outer layer 6.</p>
申请公布号 EP0956878(A2) 申请公布日期 1999.11.17
申请号 EP19990303757 申请日期 1999.05.14
申请人 TERUMO KABUSHIKI KAISHA 发明人 TACHIKAWA, KOUICHI;OKAYAMA, TOMOKI
分类号 A61M25/00;(IPC1-7):A61M25/00;A61M25/06 主分类号 A61M25/00
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