Irreversible Electroporation for Selective Lung Tissue Ablation
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Solution Overview
Problem
Current treatments for Congestive Obstructive Pulmonary Disease (COPD) such as Lung Volume Reduction Surgery (LVRS) come with significant risks and complications, and existing ablation techniques are non-selective, affecting not only the diseased tissue but also surrounding healthy structures.
Innovation Solution
The use of Irreversible Electroporation (IRE) as a minimally invasive ablation technique that applies controlled electric pulses to selectively ablate diseased lung tissue without raising or lowering the temperature of the ablation zone, thus sparing critical structures like airways, blood vessels, and nerves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ablation techniques (radiofrequency, microwave, laser) are used to treat diseased lung tissue, then tissue ablation is achieved, but surrounding healthy structures (airways, blood vessels, nerves) are damaged due to thermal spread
Solution Approach 1:
The patent changes the fundamental parameter of ablation from thermal-based (radiofrequency, microwave, laser) to electrical-based (irreversible electroporation). By using high-voltage electrical pulses instead of continuous thermal energy, the ablation mechanism becomes selective to cell membranes while sparing extracellular structures. This parameter change resolves the contradiction by enabling effective ablation without the thermal spread that damages surrounding healthy structures.
Solution Approach 2:
The patent replaces the thermal-mechanical ablation system (heat generation and tissue coagulation) with an electrical-field-based system (irreversible electroporation). The electrical pulses create permanent pores in cell membranes through electroporation, leading to selective cell death without the need for thermal mechanisms. This substitution eliminates the harmful thermal effects on surrounding structures while maintaining ablation effectiveness.
2Reliability
If Lung Volume Reduction Surgery (LVRS) is performed to treat COPD, then lung function is improved, but significant surgical risks and complications occur
Solution Approach 1:
The patent extracts the essential therapeutic effect of LVRS (reduction of diseased lung volume to improve function) while removing the invasive surgical components. By using percutaneous or endobronchial delivery of IRE electrodes, the procedure achieves lung volume reduction through minimally invasive ablation of diseased tissue, eliminating the need for open chest surgery and its associated risks.
Solution Approach 2:
The patent introduces IRE as an intermediary between the aggressive surgical approach of LVRS and the need for minimal invasion. The electrical pulses serve as a mediator that can selectively ablate diseased tissue through thin-walled structures (pleura, bronchial wall) without requiring direct surgical access to the lung parenchyma, thereby reducing surgical risks while maintaining therapeutic effectiveness.
3Manufacturing precision
If thermal ablation methods are used to ablate lung tissue, then tissue destruction is achieved, but the temperature rise damages critical structures
Solution Approach 1:
The patent fundamentally changes the ablation parameter from temperature (thermal ablation) to electrical field strength (irreversible electroporation). The threshold for irreversible electroporation is well-defined and can be precisely controlled through pulse voltage and duration parameters, enabling precise tissue ablation without temperature rise. This parameter change resolves the contradiction by decoupling ablation precision from thermal effects.
Solution Approach 2:
The patent employs periodic electrical pulses (multiple pulses delivered in sequence) to achieve irreversible electroporation. The pulsed delivery allows for controlled energy deposition with intervals between pulses, preventing thermal accumulation while ensuring complete ablation through cumulative electrical effects. This periodic action enables precise ablation boundaries without the continuous temperature rise that damages critical structures.
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
IRE effectively enhances lung function by selectively ablating diseased tissue in COPD patients, reducing complications associated with conventional treatments, and promoting a more localized and controlled tissue ablation process.
Implementation Method 1
Irreversible Electroporation (IRE) as a minimally invasive ablation technique that applies controlled electric pulses to selectively ablate diseased lung tissue without raising or lowering the temperature of the ablation zone
Data Source
AI summary
A method for treating Chronic Obstructive Pulmonary Disease (COPD) or chronic bronchitis to alleviate the discomforts of breathing by using non-thermal electroporation energy to ablate diseased portions of the lung including the bronchus, airways and alveoli which, in effect, opens the restrictive diseased portions thereby maximizing the overall surface area thereof causing improved airflow and uninhibited breathing.