Multi-Axis Thermal Cutting Element for Electrosurgical End Effector
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Solution Overview
Problem
Existing electrosurgical forceps require a mechanical knife to cut treated tissue, which can be cumbersome and may not always provide precise cutting, especially in delicate surgical procedures.
Innovation Solution
An end effector assembly with a thermal cutting element that is independently activatable and moveable, connected to an electrosurgical energy source, allowing for precise thermal cutting of tissue using energy-based cutting, which can be selectively extended or retracted via an actuator, such as a T-channel actuator, and is supported within an insulative material to prevent heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mechanical knife is used to cut treated tissue, then the cutting function is provided, but the precision and efficiency of cutting are reduced
Solution Approach 1:
The patent replaces the mechanical knife system with a thermal cutting element that uses electrosurgical energy to cut tissue. The thermal cutting element is energized from an electrosurgical generator to provide cutting through thermal energy rather than mechanical action, thereby improving both precision and efficiency of tissue cutting.
Solution Approach 2:
The patent changes the cutting mechanism from mechanical to thermal by adjusting the energy parameter. The thermal cutting element can be independently activated and controlled through electrosurgical energy parameters, allowing for more precise and efficient cutting compared to mechanical knives.
2Measurement precision
If a thermal cutting element is added to the end effector assembly, then cutting precision is improved, but device complexity increases
Solution Approach 1:
The thermal cutting element is integrated into the existing end effector assembly, allowing the same device to perform both sealing (through the electrically conductive tissue engaging surfaces) and cutting functions. This multi-functionality reduces the need for separate mechanical knife components, thereby managing device complexity while improving cutting precision.
Solution Approach 2:
The patent uses an actuator as an intermediary mechanism to control the thermal cutting element's movement and activation. The actuator system, which may include T-channel actuators, provides controlled movement of the thermal cutting element relative to the jaw members, enabling precise cutting while managing the complexity through a dedicated control mechanism.
3Ease of operation
If the thermal cutting element is made independently activatable, then cutting control is improved, but device complexity increases
Solution Approach 1:
The thermal cutting element is designed to be independently activatable and movable relative to the electrically conductive tissue engaging surfaces. This dynamic capability allows the surgeon to control when and how the cutting element is activated and positioned, improving ease of operation despite the increased complexity of the activation system.
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
Enables precise and efficient thermal cutting of tissue, reducing the need for mechanical knives and enhancing surgical precision by using energy-based cutting, which can be controlled for optimal tissue treatment and dissection.
Implementation Method 1
thermal cutting element... adapted to connect to the electrosurgical energy source... enables precise and efficient thermal cutting of tissue using energy-based cutting
Implementation Method 2
The thermal cutting element is movably supported within an insulative material disposed in the electrically conductive tissue engaging surface of the jaw member
Data Source
AI summary
An end effector assembly for an electrosurgical instrument includes a pair of opposing jaw members each including a jaw housing supporting an electrically conductive tissue engaging surface thereon. The jaw members are movable relative to one another to grasp tissue therebetween. A thermal cutting element is operatively associated with the electrically conductive tissue engaging surface of one jaw member and is independently activatable relative to the electrically conductive tissue engaging surfaces. The thermal cutting element is selectively moveable in a first direction relative to the electrically conductive tissue engaging surface along a transverse axis perpendicular to a longitudinal axis defined through the jaw member and is selectively moveable in a second direction along the longitudinal axis to extend relative to a distal end of the jaw member.