Electrosurgical Device Segmented Return Electrodes
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Solution Overview
Problem
Existing electrosurgical devices face limitations in tissue removal rates and coagulation efficiency due to small active electrode sizes, leading to increased procedure time, potential for unintended tissue damage, and inconsistent hemostasis, which results in increased blood loss and safety concerns.
Innovation Solution
An electrosurgical apparatus with one active electrode and two return electrodes, allowing for balanced or controlled imbalanced current flow, and adjustable electrode configurations to optimize tissue removal and coagulation, including expandable and flexible designs for improved maneuverability and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the active electrode size is increased to improve tissue removal rate, then productivity increases, but far field issues arise causing problems with initiation and creation of a uniform plasma zone
Solution Approach 1:
The invention divides the return electrode into multiple segments (first return electrode and second return electrode) positioned at opposite ends of the active electrode. This segmentation allows each return electrode segment to work in conjunction with the active electrode to create focused plasma zones, enabling larger active electrode surface area while maintaining reliable plasma initiation and uniformity through distributed current return paths.
2Loss of time
If the active electrode size is increased to reduce procedure time, then productivity increases, but the chance of unintended tissue damage increases
Solution Approach 1:
The invention creates localized high-current-density zones at the interfaces between the active electrode and each return electrode segment. By positioning return electrodes at opposite ends, the current flow is concentrated at these specific locations, enabling efficient tissue removal at the treatment site while limiting the spread of high-current-density effects and reducing the risk of unintended tissue damage to surrounding areas.
3Productivity
If the active electrode size is increased to improve tissue removal, then productivity increases, but more power is required to maintain high current density
Solution Approach 1:
The invention segments the return electrode into multiple parts positioned at opposite ends of the active electrode. This segmentation creates multiple current return paths, allowing the system to maintain high current density at the treatment site with distributed power delivery. The multiple return paths reduce the overall resistance and enable efficient power utilization, achieving high tissue removal rates without requiring excessive total power input.
4Reliability
If the return surface area to active surface area ratio is optimized for reliable plasma initiation, then reliability improves, but the active electrode must be smaller reducing tissue removal rate
Solution Approach 1:
The invention segments the return electrode into multiple smaller units (first and second return electrodes) positioned at opposite ends of the active electrode. This segmentation allows each return electrode segment to form an optimized ratio with portions of the active electrode surface, ensuring reliable plasma initiation at each interface. Simultaneously, the overall active electrode can maintain a larger total surface area for increased tissue removal capacity, as the segmented return paths distribute the current effectively across the active surface.
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 apparatus achieves up to 50% higher tissue removal rates, consistent initiation and vaporization, improved hemostasis, reduced blood loss, and faster patient recovery with enhanced safety and visibility during procedures.
Implementation Method 1
Electrosurgery is the application of electrical current to tissue for the purpose of surgically altering the tissue. It is a method commonly used for a variety of medical procedures including, but not limited to, resecting or vaporizing tissue (typically by ablation)
Implementation Method 2
Electrosurgical devices generally operate by providing electrical current traveling from an active electrode through target tissue to a return electrode. Depending on the characteristics of the energy (voltage, frequency, wattage, for example) being passed through the tissue, and the device electrodes (size, shape, distance, for example), the tissue can be transected, vaporized or coagulated.
Implementation Method 3
When the electrodes are too far apart, or have a surface area that is too large, then far field issues arise causing problems with initiation and creation of a uniform plasma zone around the active electrode
Data Source
AI summary
An electrosurgical assembly is disclosed, the assembly having two, three or more electrodes configured to provide advantageous tissue removal and precision for conducting electrosurgical procedures, including improved ablation and coagulation of tissue. The electrodes are configured and arranged so that energy can be applied in a highly uniform and precise fashion, depending upon the application. In addition, the electrosurgical assembly allows flexibility in use by, in some embodiments, allowing selective switching of the active and return electrodes, and also selective switching between ablation and coagulation modes. In certain embodiments the invention includes one or more electrodes having the ability to undergo changes in shape.