Polymeric marker with high radiopacity for use in medical devices

A medical device, polymer technology, used in the field of tubes, intraluminal devices, wires or similar devices, can solve the problem of degrading the properties of polymer matrix, and achieve the effect of easy measurement of damage

Inactive Publication Date: 2007-01-24
ABBOTT CARDIOVASCULAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] A disadvantage of this approach has been found to be that suitable polymers can fill radiographically opaque materials to obtain a composition, but there is a clear limit to the amount that can be filled, where the composition is such that That is, it can be successfully mixed, economically molded to the appropriate marking size, and easily assembled to a part without unduly degrading the desired properties of the polymer matrix

Method used

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  • Polymeric marker with high radiopacity for use in medical devices
  • Polymeric marker with high radiopacity for use in medical devices
  • Polymeric marker with high radiopacity for use in medical devices

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Embodiment Construction

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0023]The present invention provides radiopaque polymeric markers for use on a variety of devices that are bendable, highly radiopaque, and which can be readily attached to such devices by melt bonding. These properties allow the marking to have a minimum degree of thickness and thus minimize the impact of the marking on the overall profile and stiffness of the device to which it will be incorporated. In addition, higher weight percentages further increase the radiopacity of the marker and allow for a reduction in the cross-sectional size of the marker.

[0024] To achieve the high fill rates necessary to achieve the desired radiopacity, and to achieve this without sacrificing either the mixability and processability of the polymer material or its ultimate strength and flexibility, many different The parameters have been found to be important. More specifically, the particle shape and size of the radiopaque agent must be care...

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Abstract

High radiopacity is achieved in a polymeric marker by combining a polymeric resin, a powdered radiopaque agent having uniformly shaped particles of a specific particle size distribution, and a wetting agent. The method to produce the marker calls for the blending and pelletization of these materials followed by extrusion onto support beading. The resulting supported tubing is subsequently cut to length with the beading still in place. After ejection of the beading remnant the marker is slipped into place on the device to be marked and attached by melt bonding. Marking of a guide wire allows lesions to be measured while the marking of balloon catheters allow the balloon to be properly positioned relative to a lesion.

Description

[0001] Cross reference to related applications [0001] This application is a continuation-in-part of co-pending parent application Serial No. 10 / 667,710 filed September 22, 2003, the entire contents of which are hereby incorporated by reference. Background of the invention [0002] The present application relates to elongate in vivo devices, and more particularly, to intraluminal devices for stent deployment, percutaneous coronary angioplasty (PTCA), and similar procedures. PTCA is widely used in the treatment of coronary heart disease. In this procedure, a balloon dilatation catheter is inserted into the patient's coronary artery and a balloon on the catheter is inflated in the narrowed area of ​​the patient's artery to open the artery and increase blood flow through the artery . In order to facilitate the delivery of dilatation catheters into the patient's coronary arteries, first a guide catheter with a preshaped distal tip is percutaneously introduced into the patient's...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K49/04A61M25/01A61B5/05A61B5/107A61B19/00A61F2/06A61F2/84A61L29/18A61L31/18
CPCA61B19/54A61M25/0108A61K49/0419A61F2/958A61B5/1076A61L29/18A61L31/18A61F2250/0098A61B90/39A61B2562/17
Inventor V·P·巴瓦罗J·A·辛普森P·J·达夸尼A·巴尔德温W·E·科尼什
Owner ABBOTT CARDIOVASCULAR
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