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1. AU2002220046 - Catheter shaft having variable thickness layers and method of making

Office Australia
Application Number 2002220046
Application Date 29.10.2001
Publication Number 2002220046
Publication Date 21.03.2002
Publication Kind A
IPC
A61M 25/00
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
A61M 25/16
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
16Making or assembling not otherwise provided for
Applicants Advanced Cardiovascular Systems Inc.
Inventors Carter, Mark
Priority Data 09707681 06.11.2000 US
Title
(EN) Catheter shaft having variable thickness layers and method of making
Abstract
(EN)
A catheter having a shaft with at least two variable layers, in which the relative proportions of the two layers changes along at least a part of the multilayered shaft section. The catheter shaft includes a cotapered transition section having a first layer tapering to a decreased thickness, and a second layer inversely tapering to an increased thickness. In one embodiment, the shaft has one or more tapered outer and/or inner surfaces in addition to the cotapered transition. The tapered outer or inner surface of the shaft is typically longitudinally displaced from the cotapered transition section, and the shaft having a cotapered transition section is coextruded. The shaft of the invention provides improved transitions between shaft sections, to thereby change characteristics such as the shaft stiffness along the length of the catheter.