Pacemaker Electrode Lead Carbon Nanotube Composite Strength
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The mechanical strength and toughness of traditional pacemaker electrode leads decrease with diameter, leading to potential damage and reduced working life due to mechanical stress, posing safety risks for patients.
Innovation Solution
A pacemaker electrode lead with a carbon nanotube composite structure wound around a core wire, enhancing mechanical strength and toughness, and a metal material layer for improved conductivity, while maintaining a small physical size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the diameter of the lead wire is reduced to maintain small physical size, then the device becomes more compact and easier to implant, but the mechanical strength and toughness of the lead wire decreases
Solution Approach 1:
The patent applies composite materials by combining carbon nanotubes with traditional metal lead wire materials. The carbon nanotube layer is deposited on the surface of the metal lead wire, creating a composite structure that leverages the high strength-to-weight ratio and exceptional mechanical properties of carbon nanotubes while retaining the electrical conductivity and structural integrity of the metal core. This composite approach resolves the contradiction by enabling the lead wire to maintain small diameter while achieving superior mechanical strength and toughness through the synergistic properties of the composite material system.
2Volume of moving object
If the diameter of the lead wire is reduced to maintain small physical size, then the device becomes more compact, but the working life of the electrode lead decreases due to potential breakage
Solution Approach 1:
The carbon nanotube-reinforced composite structure significantly enhances the mechanical strength and fatigue resistance of the lead wire, directly improving reliability and working life. The carbon nanotube layer acts as a protective reinforcement that prevents crack initiation and propagation under cyclic mechanical loading, thereby extending the operational lifespan of the electrode lead while maintaining its compact size.
Solution Approach 2:
The patent applies local quality by selectively depositing carbon nanotubes on specific regions of the lead wire where mechanical stress is most concentrated, such as the bending zones and connection points. This localized reinforcement strategy optimizes the distribution of mechanical strength throughout the lead wire structure, ensuring enhanced durability in critical areas without adding unnecessary weight or volume to the entire device.
3Strength
If a carbon nanotube composite structure is added to enhance mechanical strength, then the mechanical properties improve, but the device complexity increases
Solution Approach 1:
The patent replaces traditional mechanical reinforcement approaches (such as using thicker metal wires or adding multiple metal layers) with a carbon nanotube-based solution. The carbon nanotube layer provides superior mechanical reinforcement through its unique molecular structure and properties, achieving enhanced strength and toughness with a thinner, lighter coating compared to conventional mechanical reinforcement methods. This substitution reduces the overall structural complexity while delivering superior mechanical performance.
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 composite structure increases the lead's mechanical strength and toughness, preventing breakage and ensuring prolonged pacemaker functionality by maintaining signal transmission and organ stimulation efficiency.
Implementation Method 1
The sub-lead wire includes a core wire structure and a carbon nanotube composite structure wound around the core wire structure
Implementation Method 2
a metal material layer for improved conductivity
Data Source
AI summary
An electrode lead of a pacemaker includes a lead wire. The lead wire includes at least one sub-lead wire and an electrode head electrically connected with the lead wire. The sub-lead wire includes a core wire structure and a carbon nanotube composite structure wound around the core wire structure. The pacemaker includes a pulse generator and the electrode lead electrically connected to the pulse generator.