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Multilumen Medical Lead

IP.com Disclosure Number: IPCOM000011448D
Publication Date: 2003-Feb-20
Document File: 3 page(s) / 426K

Publishing Venue

The IP.com Prior Art Database

Abstract

A medical lead is provided with multiple insulation layers, or redundant insulation, between conductors, and with a non-coiled tubular lumen. Such a design overcomes problems with perforation of insulation, lead prolapse, and shorting of conductors, among other problems. The lead design includes a multilumen lead body comprised of insulation that defines a stylet lumen and conductor lumens. The conductors may also include a coating of insulation, providing further redundancy in the insulation protecting conductors from one another and reducing the chance of conductors shorting together. The individual conductor lumens allow for slack in the placement of the inserted conductors, which enhances fatigue resistance.

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Multilumen Medical Lead

                    A medical lead is provided with multiple insulation layers, or redundant insulation, between conductors, and with a non-coiled tubular lumen.  Such a design overcomes problems with perforation of insulation, lead prolapse, and shorting of conductors, among other problems.  For instance, the lead body described herein is less than 0.056 inches in diameter, e.g., 0.053 inches in diameter.


The lead design, shown in isometric view in FIG. 1A and cross-section view in FIG. 1B, includes a multilumen lead body 10.  The lead body 10 is comprised of insulation 12, which defines a stylet lumen 14 and conductor lumens 16.  A lead constructed using a multilumen lead body is not prone to perforation or prolapse since the stylet lumen 14 is an integral part of the lead body 10.  In addition, the conductors inserted in the conductor lumens 16 of the lead body 10 increase the overall stiffness of the lead body and further minimize the chance of perforation.

FIGS. 2A and 2B show cross-sectional views of multilumen lead body 10 with conductors 20 in place in conductor lumens 16.  As best seen in FIG. 2A, conductors 20 may include insulation coating 22, which provides further redundancy in the insulation protecting conductors from one another and reducing the chance of conductors shorting together.  As best seen in FIG. 2B, the individual conductor lumens 16 allow for slack in the placement of the inserted conductors 20, which slack enhances fatigue resistance.

Each conductor 20 may comprise an electrically conductive wire or c...