RF Tissue Ablation Jaws with Intra and Inter-Electrode Energy Delivery
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Solution Overview
Problem
Current RF tissue ablation devices face challenges in efficiently and effectively applying radiofrequency energy to target tissues for precise ablation procedures, particularly in cardiac applications, where achieving consistent and controlled tissue ablation is crucial for treating conditions like atrial fibrillation.
Innovation Solution
The development of RF tissue ablation devices with elongated members featuring first and second jaws configured to apply intra and inter RF energy, coupled with a connector for operatively connecting to an RF energy source, allowing for precise control and delivery of RF energy to tissue, enabling effective tissue ablation with minimal tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional RF energy delivery systems are used, then RF energy can be transferred to tissue, but the ability to apply controlled intra and inter RF energy simultaneously is limited
Solution Approach 1:
The device divides the RF energy delivery function into separate intra-electrode and inter-electrode pathways. Each jaw contains multiple electrodes that can independently receive RF energy, allowing simultaneous intra-jaw and inter-jaw ablation. This segmentation enables versatile energy application while maintaining manageable device architecture through modular electrode assembly.
Solution Approach 2:
The device integrates multiple RF energy delivery modes (intra and inter) into a single ablation instrument. The same jaw structure serves both as an intra-electrode source and an inter-electrode source, eliminating the need for separate devices and enabling comprehensive tissue ablation control.
2Power
If higher current density is applied to increase heating, then ablation effectiveness improves, but tissue damage and procedural safety risks increase
Solution Approach 1:
The device applies different current densities to different regions of the tissue through selective electrode activation. Intra-electrode current flows through specific intra-jaw pathways while inter-electrode current flows through inter-jaw pathways, allowing localized control of heating intensity to match the specific ablation requirements of different tissue zones without causing excessive damage.
Solution Approach 2:
The system incorporates impedance sensing and real-time power monitoring that provides feedback on tissue characteristics and heating rates. This feedback mechanism allows the controller to dynamically adjust current density to optimize heating efficiency while preventing excessive tissue damage by reducing power when impedance changes indicate approaching damage thresholds.
3Manufacturing precision
If monopolar or bipolar system configuration is used, then RF energy can be delivered, but precision and control over the ablation zone are limited
Solution Approach 1:
The device dynamically switches between different electrode configurations (intra-electrode only, inter-electrode only, or both simultaneously) based on the procedural requirements and tissue anatomy. This dynamic reconfigurability provides precise control over the ablation zone shape and location while maintaining ease of operation through automated configuration selection.
Solution Approach 2:
The device merges intra-electrode and inter-electrode current pathways into a unified delivery system that can activate either or both modes simultaneously. This combination enables precise control over the ablation zone by spatially separating current pathways while maintaining operational simplicity through integrated control electronics.
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
These devices enable precise and efficient tissue ablation, reducing procedure time and minimizing tissue damage, thereby effectively treating cardiac conditions such as atrial fibrillation by creating controlled ablation lesions.
Implementation Method 1
The current causes the tissue to heat up as the electromagnetic wave overcomes the tissue's impedance
Implementation Method 2
RF procedures utilize an RF generator, an active electrode and a return electrode. The RF generator generates RF energy typically above 100 kilohertz
Data Source
AI summary
RF tissue ablation devices are provided. Aspects of the RF tissue ablation devices include an elongated member having a proximal and distal end, first and second jaws at the distal end, wherein the first and second jaws are configured to apply intra and inter RF energy to tissue disposed between the jaws during use, and a connector at the proximal end for operatively connecting to a RF energy source. Also provided are systems that include an RF tissue ablation device operatively coupled to a RF energy source, as well as kits that include the devices and methods of using the devices in RF tissue ablation applications, including cardiac applications.