Dual-mode tissue ablation needle for large tumor treatment
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Solution Overview
Problem
The existing pulsed electric field ablation technology is not suitable for large tumors due to the limited spacing between ablation needles and the inability to achieve needle path ablation, leading to increased surgical difficulty and risk, as well as the risk of tumor metastasis.
Innovation Solution
A dual-mode tissue ablation needle is designed with a needle body, an insulation assembly, and a water delivery assembly, allowing for simultaneous application of pulsed electric field and radio frequency energy. The insulation assembly adjusts the exposed length of the needle, and the water delivery assembly provides cooling, enabling effective ablation of large tumors and preventing needle path metastasis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pulsed electric field ablation is used for large tumors, then ablation effectiveness is improved, but the number of needles required increases, making the procedure more complex and risky
Solution Approach 1:
The patent combines pulsed electric field ablation and radio frequency ablation into a single needle system. The needle includes both pulse electrodes for generating high-voltage pulses and RF electrodes for delivering radio frequency energy, allowing both ablation modes to be performed through one insertion site rather than requiring multiple separate needles.
Solution Approach 2:
The single ablation needle is designed to perform multiple functions: it can deliver pulsed electric field for ablation, deliver radio frequency energy for ablation, and provide cooling through integrated water channels. This multi-functional design eliminates the need for multiple specialized needles while maintaining comprehensive ablation capability.
2Manufacturing precision
If pulsed electric field ablation is used, then treatment precision is improved, but needle path metastasis risk increases due to inability to achieve needle path ablation
Solution Approach 1:
The system combines pulsed electric field ablation and radio frequency ablation in a single needle, enabling the RF component to ablate the needle path while the pulse component provides precise tumor ablation. This dual-mode approach simultaneously achieves treatment precision and eliminates metastasis risk by treating both the tumor and the needle tract.
3Area of stationary object
If multiple ablation needles are inserted for large tumors, then ablation coverage is improved, but surgical difficulty and risk increase
Solution Approach 1:
The patent merges multiple ablation functions into a single needle structure. By integrating both pulse and RF ablation capabilities in one needle, the system achieves comprehensive ablation coverage that would otherwise require multiple needles, thereby reducing surgical difficulty and procedural risk while maintaining adequate treatment coverage.
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 dual-mode tissue ablation needle effectively ablates large tumors with reduced surgical difficulty and risk, achieves needle path ablation to prevent metastasis, and provides real-time temperature monitoring for safe tissue ablation.
Implementation Method 1
a water channel is provided inside the insulation assembly, an end of the water channel is in communication with the water delivery assembly, and an other end of the water channel is in communication with outside
Implementation Method 2
a temperature measuring device is arranged in the water channel
Implementation Method 3
the pulsed electric field ablation does not rely on temperature effect, but releases high-voltage electric pulse to form irreversible perforation on the cell membrane and destroy the intracellular balance, thus causing rapid cell apoptosis
Implementation Method 4
simultaneous application of pulsed electric field and radio frequency energy
Data Source
AI summary
The present application relates to the technical filed of ablation needle, and provides a dual-mode tissue ablation needle including a needle body (1), an insulation assembly (2), and a water delivery assembly (3); the insulation assembly (2) is slidably sleeved outside the needle body (1); a water channel (121) is provided inside the insulation assembly (2), an end of the water channel (121) is in communication with the water delivery assembly (3), and an other end of the water channel (121) is in communication with outside. The present application is simple in structure, which is easy to operate and use, and the structure can be used for dual-mode switching for different lesions and tumors of different sizes, the difficulty and risk of surgery is reduced, and the practicability is strong.