Pacemaker Electrode Line Using Carbon Nanotube Wire

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Solution Overview

Problem

Pacemakers face challenges with excessive fibrotic tissue growth on electrode lines, making removal difficult and mechanical strength low due to metal or alloy conductors with small diameters.

Innovation Solution

Incorporating a carbon nanotube wire with uniformly distributed radioactive particles in the electrode line, which reduces fibrotic tissue growth and enhances mechanical strength by using twisted or non-twisted carbon nanotube structures and shielding layers for improved conductivity and toughness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If metal or alloy conductors with small diameter are used in the electrode line, then the electrical conductivity is improved, but the mechanical strength becomes low

Engineering Contradiction:
Improveelectrical conductivityVSAvoidmechanical strength
Core Design Contradiction:
ReliabilityVSStrength

Solution Approach 1:

The patent uses carbon nanotubes as the conductor material in the electrode line. Carbon nanotubes are a composite material structure consisting of carbon atoms arranged in a cylindrical lattice, combining high electrical conductivity with exceptional mechanical strength. This replaces traditional metal conductors, simultaneously achieving both high conductivity and high mechanical strength without the trade-off present in conventional materials.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent changes the material parameter from metal/alloy to carbon nanotubes, fundamentally altering the physical and mechanical properties of the conductor. This parameter change enables the electrode line to achieve both high electrical conductivity and high mechanical strength, resolving the contradiction between these two properties.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If the electrode line is implanted into the organ or tissue, then the therapy function is achieved, but excessive fibrotic tissue growth occurs making removal difficult

Engineering Contradiction:
Improvetherapy functionVSAvoidease of removal
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent incorporates radioactive particles into the carbon nanotube conductor, which emit radiation that inhibits fibrotic tissue growth around the implanted electrode line. By converting the potentially harmful radiation into a beneficial anti-fibrotic effect, the patent prevents the formation of excessive scar tissue, making the electrode line easier to remove after therapy while maintaining its therapeutic function.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent introduces a new parameter - radioactivity - into the conductor material. This parameter change has the dual effect of maintaining electrical conductivity through the carbon nanotube structure while the radioactive emission creates a localized radiation field that prevents fibrotic tissue encapsulation, thereby facilitating future removal.

Inventive Principle:
Principle #35Parameter changes

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 carbon nanotube wire with radioactive particles prevents excessive fibrotic tissue growth, allowing easier removal of the electrode line and increases mechanical strength, thereby improving the efficiency and effectiveness of the pacemaker.

Implementation Method 1

a first conductor 242 includes a carbon nanotube wire having a number of radioactive particles uniformly distributed therein

Methodology Applied
Scientific EffectRadioactive decay: Radioactive Decay

Implementation Method 2

a carbon nanotube wire with uniformly distributed radioactive particles in the electrode line, which reduces fibrotic tissue growth and enhances mechanical strength by using twisted or non-twisted carbon nanotube structures

Methodology Applied
Scientific EffectCarbon nanotubes: Carbon Nanotubes

Implementation Method 3

shielding layers for improved conductivity and toughness

Methodology Applied
Scientific EffectElectromagnetic shielding: Faraday Cage

Data Source

PatentUS9433801B2Pacemakers and pacemaker leads
Publication Date: 2016.09.06 HON HAI PRECISION INDUSTRY CO LTD
  • US9433801B2 patent drawing
  • US9433801B2 patent drawing
  • US9433801B2 patent drawing

AI summary

A pacemaker is provided. The pacemaker includes a pulse generator and an electrode line connecting with the pulse generator. The electrode line includes at least one conductor. The at least one conductor includes at least one carbon nanotube wire having a plurality of radioactive particles therein.