Electrosurgery Needle Electrode with Fixed Relative Positioning
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Solution Overview
Problem
Existing electrosurgery devices face challenges in maintaining consistent high-frequency current application across varying positional relationships between electrodes during tissue incision, leading to potential interruptions in treatment efficacy and increased invasiveness.
Innovation Solution
A treatment device for electrosurgery featuring a needle-like electrode with a fixed relative positional relationship to a passive electrode, both of which are designed to maintain contact with the tissue regardless of positional changes, utilizing a conductive coil sheath and insulators to ensure continuous high-frequency current application between the electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrodes are positioned at fixed locations relative to each other, then high-frequency current application is stable, but the device cannot adapt to varying tissue positions and depths
Solution Approach 1:
The treatment portion is designed to be movable relative to the sheath, allowing dynamic adjustment of electrode positions. The first electrode can be extended or retracted from the sheath to reach different tissue depths and positions while maintaining a fixed relative position to the second electrode, thus achieving both stability and adaptability
Solution Approach 2:
The device is divided into distinct segments: the sheath and the treatment portion. This segmentation allows the treatment portion to move independently relative to the sheath, enabling the electrodes to adapt to varying tissue positions while maintaining their fixed relative relationship for stable current application
2Object-affected harmful factors
If the treatment portion is inserted deep into the body cavity, then tissue trauma is reduced, but it becomes difficult to maintain consistent electrode positioning
Solution Approach 1:
The treatment portion is nested within the sheath, with the first electrode housed inside the sheath when not in use. This nesting allows deep insertion into the body cavity while maintaining precise electrode positioning through the fixed relative relationship between the treatment portion and sheath, reducing tissue trauma while ensuring positioning accuracy
3Reliability
If multiple electrodes are provided to maintain contact across positional changes, then current application reliability improves, but device complexity increases
Solution Approach 1:
The insulator is extracted as a separate component between the first and second electrodes, clearly defining their electrical isolation. This allows the device to maintain continuous current application through the fixed relative positioning of electrodes while managing complexity through modular component design
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 device ensures uninterrupted high-frequency current flow, allowing for precise and localized tissue incision with reduced invasiveness by maintaining electrode contact across different positions, thereby enhancing treatment efficiency and minimizing tissue trauma.
Implementation Method 1
a first conductive portion that applies a high-frequency current to the first electrode, and a second conductive portion that applies a high-frequency current to the second electrode
Implementation Method 2
an insulator that insulates the first electrode from the second electrode by being interposed between the first and second electrodes
Data Source
AI summary
A treatment device for electrosurgery includes a sheath that has a distal end portion and a proximal end portion; a needle-like electrode that has a distal end and a proximal end, is inserted into the sheath such that it is capable of advancing and retracting inside the sheath, and treats a target site at the distal end; a first electrode provided at the distal end of the needle-like electrode and exposed from the sheath; a second electrode fixed with respect to the first electrode at a position separated from the first electrode toward the proximal end; an insulator that insulates the first electrode from the second electrode by being interposed between the first and second electrodes; a first conductive portion that applies a high-frequency current to the first electrode; and a second conductive portion that applies a high-frequency current to the second electrode.