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1. WO2000043061 - INTRAVASCULAR CATHETER WITH COMPOSITE REINFORCEMENT

Publication Number WO/2000/043061
Publication Date 27.07.2000
International Application No. PCT/US2000/001412
International Filing Date 20.01.2000
Chapter 2 Demand Filed 10.07.2000
IPC
A61M 25/00 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
25Catheters; Hollow probes
CPC
A61M 25/005
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
25Catheters; Hollow probes
0043characterised by structural features
005with embedded materials for reinforcement, e.g. wires, coils, braids
A61M 25/0053
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
25Catheters; Hollow probes
0043characterised by structural features
005with embedded materials for reinforcement, e.g. wires, coils, braids
0053having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
Applicants
  • BOSTON SCIENTIFIC LIMITED [IE/BB]; The Corporate Center, Bush Hill Bay Street St. Michael, BB
Inventors
  • GARABEDIAN, Robert, J.; US
  • GRIEGO, John; US
  • BARDSLEY, Earl; US
  • SCHAEFER, Dean, A.; US
  • DAO, Cang, D.; US
  • ANDERSON, Steven, M.; US
  • PAULK, David; US
Agents
  • ATKINSON, Robert, E. ; Crompton, Seager & Tufte, LLC 331 Second Avenue South Suite 895 Minneapolis, MN 55401, US
Priority Data
09/234,20320.01.1999US
09/487,35319.01.2000US
09/487,35919.01.2000US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) INTRAVASCULAR CATHETER WITH COMPOSITE REINFORCEMENT
(FR) CATHETER INTRAVASCULAIRE A RENFORT COMPOSITE
Abstract
(EN)
This invention is an intravascular catheter (10) that exhibits the combined features of superior flexibility, softness, radiopacity, and oval/kink resistance. The proximal region (14) of the shaft (12) includes an inner lubricous polymer layer (26), a reinforcement layer (32), and an outer layer (30). The reinforcement layer (32) may comprise a braid having one or more metallic helical members (42), and a plurality of mono-filaments (41), preferably formed of LCP. The polymer members of the braid provide improved flexibility, and softness in addition to high burst pressure. The metallic members of the braid provide improved radiopacity, and oval/kink resistance. The catheter (10) may also include one or more axial members disposed between the helical members that form the braid. The axial members (34) provide a number of advantages including maintaining one-to-one correspondence in axial manipulation; maintaining uniform flexibility in several planes of flexure; reducing the likelihood of causing a curling effect; uniformly increasing stiffness of the catheter; and increasing the burst strength of the catheter.
(FR)
L'invention concerne un cathéter intravasculaire (10) qui possède une combinaison de caractéristiques: de plus grandes souplesse, douceur et radio-opacité et une meilleure résistance à l'ovalisation et au vrillage. La région proximale (14) d'un arbre (12) comprend une couche polymère interne lubrifiante (26), une couche de renfort (32) et une couche externe (30). La couche de renfort (32) peut comprendre une tresse comportant deux ou plusieurs composants métalliques (42) et plusieurs filaments uniques (41), de préférence en LCP. Les éléments polymères de la tresse assurent une meilleure souplesse et une plus grande douceur, en plus d'une pression d'éclatement plus élevée. Les éléments métalliques de la tresse assurent une plus grande radio-opacité et une meilleure résistance à l'ovalisation et au vrillage. Le cathéter (10) peut aussi comprendre un ou plusieurs éléments axiaux disposés entre les éléments hélicoïdaux formant la tresse. Les éléments axiaux (34) offrent un certain nombre d'avantages, y compris le maintien de la correspondance un pour un lors des manipulations axiales, le maintien d'une flexibilité uniforme dans plusieurs plans de flexion, la réduction des risques d'un effet d'enroulement, l'augmentation uniforme de la rigidité du cathéter et l'augmentation de la pression d'éclatement.
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