Flexible Electrosurgical Shaft for Plasma Beam Direction Control
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Solution Overview
Problem
Existing electrosurgical systems with cold plasma applicators face mechanical complexity, high cost, and operational unwieldiness, especially in endoscopic procedures, due to the need for redirecting the plasma beam without compromising precision and safety.
Innovation Solution
An electrosurgical apparatus with a flexible shaft and a retractable sheath over an electrode, allowing for both mechanical and electrosurgical cutting modes, and the generation of a plasma beam by providing electrosurgical energy and inert gas to the electrode, with the sheath being extendable and retractable to expose or conceal the electrode as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If elaborate mechanisms are developed to change the direction of the plasma beam, then the plasma beam can be redirected to specific operative sites, but the device complexity increases and the mechanisms become mechanically complicated and expensive to produce
Solution Approach 1:
The patent employs a flexible shaft with a distal tip that can be manually manipulated into various orientations. This flexible structure replaces complex mechanical redirecting mechanisms, allowing the plasma beam to be directed to different operative sites through simple bending and positioning of the flexible tip rather than through elaborate mechanical joints and actuators.
Solution Approach 2:
Instead of using fixed mechanical mechanisms to actively redirect the plasma beam, the invention inverts the approach by making the shaft itself flexible and allowing it to be passively positioned. The direction control is achieved by manipulating the flexible shaft's shape rather than by active mechanical redirection, simplifying the overall device architecture.
2Adaptability or versatility
If elaborate mechanisms are developed to change the direction of the plasma beam, then the plasma beam can be redirected to specific operative sites, but the mechanisms become unwieldy to operate effectively
Solution Approach 1:
The flexible shaft and distal tip can be easily manipulated by the surgeon's hand into various orientations, making the device unwieldy-to-operate problem disappear. The flexibility allows intuitive control without requiring complex mechanical interfaces or multiple actuators that would be difficult to manipulate during surgery.
3Adaptability or versatility
If the distal tip is configured as a retractable sheath over the electrode, then both mechanical and electrosurgical cutting capabilities are provided, but the device structure becomes more complex
Solution Approach 1:
The distal tip is designed as a retractable sheath that can cover or expose the electrode, enabling the same device to perform both mechanical cutting (when electrode is covered) and electrosurgical cutting (when electrode is exposed). This multi-functional design eliminates the need for separate devices for different cutting modes, and the added structural complexity is minimal compared to having multiple dedicated devices.
Solution Approach 2:
The retractable sheath is nested over the electrode within the distal tip, allowing one component to be placed inside another. This nested configuration enables the sheath to protect or expose the electrode as needed, providing dual cutting capabilities while maintaining a compact structure that doesn't significantly increase overall device complexity.
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 control and efficient use of plasma beam direction, reducing mechanical complexity and cost, while providing both mechanical and electrosurgical cutting capabilities, enhancing surgical precision and safety.
Implementation Method 1
The electrosurgical apparatus is configured to provide electrosurgical energy and inert gas to an electrode within the distal tip of the electrosurgical apparatus to generate a plasma beam
Implementation Method 2
Gas plasma is an ionized gas capable of conducting electrical energy. Plasmas are used in surgical devices to conduct electrosurgical energy to a patient
Implementation Method 3
The flexible shaft and the distal tip configured as a retractable sheath enable the plasma beam to be redirected
Data Source
AI summary
An electrosurgical apparatus is provided including a connector, a flexible shaft, and a distal tip. The connector may further be coupled to an electrosurgical generator and gas supply. The distal tip of the electrosurgical apparatus may be grasped by a grasping tool, such that the orientation and position of the distal tip relative to the shaft may be manipulated to achieve a plurality of positions. The electrosurgical apparatus provides electrosurgical energy and inert gas to an electrode within the distal tip of the electrosurgical apparatus to generate a plasma beam. In one aspect, the distal tip is configured as a sheath that is extendable and retractable over the electrode to expose the electrode when the sheath is in a first position and conceal or cover the electrode when the sheath is in a second position.