Conductive Suction Tube Electrosurgical Tool Design
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Solution Overview
Problem
Conventional electrosurgical tools with suction capabilities face challenges such as bubble formation during procedures, limited tool size due to internal wiring and suction tube constraints, and inefficient tissue ablation due to ring-shaped electrode geometry, which affects electrical flux and convective cooling.
Innovation Solution
An electrosurgical tool design featuring a separate, modular active electrode joined to a conductive suction tube, allowing for optimized energy delivery and reduced convective cooling, while eliminating the need for internal wiring and minimizing tool diameter by integrating suction and energy delivery functions into a single tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional electrosurgical tool incorporates both suction tube and internal wiring within an outer shaft, then the tool can perform both suction and electrosurgical functions, but the assembly becomes complex and the tool diameter is limited
Solution Approach 1:
The suction tube itself is made electrically conductive and serves dual purposes: as a suction conduit and as the active electrode for electrosurgical energy delivery. This eliminates the need for separate internal wiring and simplifies the overall assembly while maintaining both suction and electrosurgical functionalities.
Solution Approach 2:
The conductive suction tube performs multiple functions simultaneously: fluid aspiration, electrical current conduction to the tissue, and serving as the active electrode. This multi-functional design reduces the number of components needed and simplifies the tool structure.
2Adaptability or versatility
If a conventional electrosurgical tool incorporates both suction tube and internal wiring within an outer shaft, then the tool can perform both suction and electrosurgical functions, but the available space within the outer shaft is limited
Solution Approach 1:
The suction tube and electrical wiring functions are merged into a single component - the conductive suction tube. This eliminates the need for separate wiring channels and insulation layers, maximizing the available space within the outer shaft and allowing for a larger diameter suction tube or reduced overall tool diameter.
3Device complexity
If the active electrode is defined by the distal end of a suction tube, then the electrode geometry is constrained by the suction tube geometry, but this simplifies the overall structure
Solution Approach 1:
The suction tube is made conductive specifically at its distal end where the active electrode function is needed, while the proximal portion remains insulating or non-conductive. This localized conductivity allows the suction tube to serve dual purposes without compromising the efficiency of tissue ablation at the treatment site.
4Illumination intensity
If bubbles form on the electrode surface during surgery, then the view through the endoscope is obscured, but suction can be used to remove them
Solution Approach 1:
The conductive suction tube acts as an intermediary that simultaneously delivers electrical energy to the tissue and removes bubbles from the surgical site through suction. The integrated design allows bubble removal without interrupting the electrosurgical procedure, maintaining continuous visibility and treatment.
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
This design enhances tissue treatment efficiency by allowing for high-density current delivery, reduces tool size, and minimizes convective cooling, improving surgical visibility and tissue ablation performance.
Implementation Method 1
The active electrode is disposed inside the outer shaft and is supported at the shaft tip by an insulator cap... The distal end of the active electrode extends through one of these bores
Implementation Method 2
electrosurgical tool for ablation and coagulation of body tissues... employ electrical energy to treat targeted patient tissue... ablation is utilized to vaporize or remove tissue using electrical energy
Implementation Method 3
a plastic suction tube extends inside and along the outer shaft and into the other bore. This arrangement thus permits a vacuum to be drawn through the tool from the distal end thereof
Implementation Method 4
The active electrode is disposed inside the outer shaft and is supported at the shaft tip by an insulator cap, typically constructed of ceramic
Implementation Method 5
Bipolar tools, on the other hand, incorporate both an active and a return electrode directly into the tool... The conductivity of the saline solution provides a conduction pathway between the active and return electrodes of the tool
Data Source
AI summary
An electrosurgical tool for cauterizing or ablating targeted tissue, which tool includes a conductive outer shaft which defines a return or reference electrode, and a conductive inner tube disposed within the outer shaft. The inner tube defines both a suction pathway for removing fluid and/or surgical debris from the surgical site through the distal end of the tool, and a pathway for delivering electrical energy to an active electrode secured to the distal end of the suction tube.