Lead Extraction Device with Wire Wrapping Mechanism
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Solution Overview
Problem
Existing devices for extracting implanted cardiac leads from the body face challenges due to encapsulation by fibrotic tissue, which can cause trauma and require open heart surgery, and the leads' cables often protrude laterally, hindering extraction device advancement.
Innovation Solution
A device comprising two handles with a wire member that wraps around the proximal end of the lead to secure it, allowing for easier extraction by bringing cables back into contact with the lead body and preventing lateral protrusion, facilitating the use of conventional extraction devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lead is extracted without preparation, then the extraction procedure is simpler, but the cables may protrude laterally causing trauma to surrounding tissue and vein damage
Solution Approach 1:
The device applies compression to the proximal end of the lead before extraction begins, securing the cables against the lead body in advance. This preliminary action prevents lateral protrusion of cables during the extraction procedure, eliminating tissue trauma and vein damage while maintaining procedural simplicity
2Reliability
If open heart surgery is performed to remove encapsulated leads, then complete lead removal is achieved, but significant risk, cost, and surgical complications increase
Solution Approach 1:
The compression device serves as an intermediary tool that secures the lead and cables in position during extraction. By mediating between the extraction force and the lead structure, it enables complete removal of encapsulated leads through less invasive procedures, avoiding open heart surgery and its associated risks
3Object-affected harmful factors
If the lead is secured during extraction, then cable protrusion is prevented, but the device complexity increases
Solution Approach 1:
The invention extracts only the essential function needed for lead preparation - compression and securing of the proximal end. By removing unnecessary components and focusing on the core compression function, the device achieves cable protrusion prevention with minimal structural complexity
Data Source
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AI summary
A device for preparing an elongated implanted medical apparatus, such as a cardiac lead, for extraction from the body of a patient. The device includes a first handle and a second handle. At least the first handle has a surface for receiving the implanted apparatus therealong. A wire member having a first end and a second end is positioned to span a distance between the surface of the first handle, and the second handle. The wire member first end is removably engaged with the first handle, and the wire member second end is removably engaged with the second handle. The wire member is sized and arranged to enable the wire member to be wound around a length of the implanted apparatus to facilitate extraction of the apparatus with a lead extraction device.