CIED Lead Engagement Device with Cantilevered Fingers
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Solution Overview
Problem
Existing lead engagement devices for cardiac implantable electronic device (CIED) leads often result in lead distortion or breakage during removal due to localized attachment and traction application, which can be ineffective and risky.
Innovation Solution
A lead engagement device featuring a hypotube with apertures and cantilevered lead engagement fingers that allow relative motion during insertion and inhibit motion during traction, providing a larger engagement area and reducing the risk of distortion or breakage by distributing force more evenly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If lead engagement devices attach to the CIED lead in a localized area, then the device structure is simple, but the CIED lead becomes distorted and/or breaking when traction is applied
Solution Approach 1:
The engagement device divides the engagement area into multiple discrete fingers distributed along the lead lumen. Each finger independently engages the lead at different locations, transforming a single localized engagement point into multiple distributed engagement points, thereby preventing lead distortion and breakage during traction
Solution Approach 2:
The engagement fingers extend radially outward from the hypotube wall in the radial dimension, creating engagement points distributed both longitudinally and radially. This multi-dimensional distribution of engagement points increases the effective engagement area and distributes traction forces more evenly across the lead structure
2Reliability
If the lead engagement device uses a larger engagement area, then the risk of lead distortion or breakage is reduced, but the device complexity increases
Solution Approach 1:
Multiple engagement fingers are integrated into a single monolithic hypotube structure, combining multiple engagement functions into one unified device component. This merging approach provides a large engagement area through multiple fingers while avoiding the complexity of assembling multiple separate components
Solution Approach 2:
The hypotube structure serves multiple functions simultaneously: it provides structural support, defines the engagement geometry through integrated fingers, and distributes traction forces. This multi-functionality achieves reliable lead engagement without requiring additional specialized components
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively facilitates the removal of CIED leads by distributing traction forces over a larger area, reducing the risk of lead distortion or breakage and enabling safer extraction.
Implementation Method 1
The plurality of lead engagement fingers are configured to permit relative motion between the lead engagement device and the lead when applying a first force to the lead engagement device. The plurality of lead engagement fingers are also configured to engage the lead and inhibit relative motion between the lead engagement device and the lead when applying a second force to the lead engagement device
Data Source
AI summary
A lead engagement device is configured to be positioned in a lead lumen of a lead. The lead engagement device includes a hypotube, and the hypotube includes a wall having an inner surface defining an inner lumen and an outer surface opposite the inner surface. A plurality of lead engagement fingers are coupled to the wall and extend outwardly and proximally from the outer surface. Each of the fingers is disposed adjacent to one of a plurality of apertures that extend through the wall. The fingers are configured to permit relative motion between the lead engagement device and the lead when applying a first force to the lead engagement device. The fingers are also configured to engage the lead and inhibit relative motion between the lead engagement device and the lead when applying an opposite second force to the lead engagement device.