Gas-Assisted Electrosurgical Blade with ElectroBond Coating
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Solution Overview
Problem
Current electrosurgical systems face limitations in achieving precise cutting and simultaneous vessel sealing with minimal tissue necrosis and eschar formation, particularly in hybrid plasma cut modes, where charring and carbonization are common issues.
Innovation Solution
The development of a gas-assisted electrosurgical device with a specific attachment featuring a stainless steel blade coated with ElectroBond™, a housing with a channel for gas flow, and a ceramic tip, allowing for controlled argon plasma coagulation and hybrid plasma cut modes with reduced tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrosurgical fulguration is used to coagulate tissue, then hemostasis is achieved, but charring and carbonization occur causing tissue necrosis
Solution Approach 1:
The patent changes the physical state of the gas from non-ionized to ionized (plasma) state, and modifies the electrical current characteristics from conventional high-frequency alternating current to pulsed direct current with controlled amplitude and duration. These parameter changes enable coagulation at lower temperatures, achieving hemostasis without the charring and carbonization that occur with conventional fulguration
Solution Approach 2:
The patent utilizes the phase transition of gas to plasma through ionization. By introducing ionizable gas (such as argon) and applying electrical energy, the gas transitions to a plasma state that conducts electricity and generates controlled thermal effects for tissue coagulation, avoiding the uncontrolled heating that causes necrosis
2Object-affected harmful factors
If argon plasma coagulation is used for non-contact coagulation, then tissue necrosis is reduced, but eschar formation still occurs
Solution Approach 1:
The patent employs periodic pulsed electrical delivery rather than continuous application. The pulsed direct current is delivered in controlled cycles with specific amplitude and duration parameters, allowing tissue coagulation during the pulse while providing intervals that prevent excessive heat accumulation and eschar formation
Solution Approach 2:
The system incorporates feedback control mechanisms that monitor tissue response and adjust the electrical energy delivery parameters in real-time. This feedback enables precise control of the coagulation process, achieving hemostasis while minimizing eschar formation by stopping energy delivery when the desired effect is achieved
3Manufacturing precision
If monopolar electrosurgery with small cross-sectional electrode is used to concentrate electrical energy, then cutting precision is improved, but tissue damage and charring increase
Solution Approach 1:
The patent changes the electrical current parameters from conventional high-frequency alternating current to pulsed direct current with controlled amplitude and duration. This parameter change allows concentration of electrical energy for precise cutting while controlling the total energy delivered to prevent excessive tissue damage and charring
Solution Approach 2:
The system utilizes a composite approach combining ionizable gas (such as argon plasma) with controlled electrical energy delivery. The plasma acts as an intermediary medium that concentrates energy precisely at the target site while the controlled electrical parameters prevent excessive heating and tissue damage surrounding the cut
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 solution enables precise cutting and simultaneous vessel sealing with minimal tissue necrosis and eschar formation, improving upon conventional fulguration and argon plasma coagulation techniques by reducing charring and carbonization.
Implementation Method 1
an Electrosurgical Generator delivers electrical energy through an Electrosurgical Scalpel
Implementation Method 2
supplying an ionizable gas such as argon past the active electrode to target tissue and conducting electrical energy to the target tissue in ionized pathways
Implementation Method 3
argon plasma coagulation (APC) or argon beam coagulation (ABC) is a non-contact monopolar thermoablative method
Implementation Method 4
a ceramic tip at a distal end of the housing, wherein the ceramic tip surrounds part of the distal portion of the conductive member
Implementation Method 5
a channel within the housing, a connector for connecting the channel to a gas source
Data Source
AI summary
An attachment for a gas-assisted electrosurgical device. The attachment has a housing having a channel within it, an electrosurgical blade and an electrical connector. The electrosurgical blade has a conductive member comprising an elongated distal portion and a proximal portion, the distal portion having a width greater than a width of the proximal portion, the width of the distal portion being at least three times the thickness of the distal portion, and a coating on at least a portion of said conductive member.