Electrosurgical Instrument Peripheral Suction Bypass
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Legacy electrosurgical instruments with peripheral suction flow paths face challenges in maintaining suction pressure and RF tracking efficiency in opposite sided RF shaver configurations, where the peripheral suction path increases the surface area, leading to decreased suction pressure and potential RF energy leakage, causing overheating and plasma formation.
Innovation Solution
The design incorporates additional peripheral suction inlets that bypass the primary suction aperture, creating alternative fluid channels that connect to the primary fluid channel, maintaining suction pressure and preventing RF energy leakage by redirecting fluid flow around the primary suction aperture when it becomes blocked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a peripheral suction path is incorporated into an opposite sided RF shaver, then suction flow is provided around the peripheral edge of the RF tip, but suction pressure is significantly decreased due to increased surface area of RF windows
Solution Approach 1:
The suction system is divided into multiple independent pathways: a primary suction pathway through the shave window and a peripheral suction pathway around the RF tip perimeter. This segmentation allows each pathway to function independently, so that the peripheral suction can provide cooling and debris removal without compromising the primary suction pressure needed for effective tissue removal.
Solution Approach 2:
The peripheral suction pathway utilizes the dimensional space around the perimeter of the RF tip, creating a three-dimensional suction architecture rather than relying solely on a two-dimensional aperture in the tip face. This allows suction flow to be established from multiple angular directions, maintaining pressure while providing comprehensive coverage.
2Ease of operation
If the peripheral suction path uses a gap between the insulating member and active electrode, then suction flow is provided around the RF tip, but RF energy leakage occurs causing plasma formation and overheating
Solution Approach 1:
The harmful RF energy leakage pathway through the gap between the insulating member and active electrode is extracted and eliminated. Instead, the peripheral suction pathway is formed through dedicated suction channels in the insulating member that are electrically isolated from the active electrode, preventing RF energy from reaching the peripheral suction path while maintaining effective suction flow.
Solution Approach 2:
The insulating member serves as an intermediary structure that separates the active electrode from the peripheral suction pathway. By routing suction channels through the insulating member rather than through gaps between the electrode and insulator, RF energy is blocked from reaching the peripheral suction path, preventing plasma formation while maintaining suction functionality.
3Reliability
If the primary suction aperture is blocked by tissue, then suction flow through the aperture stops, but the peripheral suction pathway maintains suction pressure and cooling
Solution Approach 1:
The peripheral suction pathway is pre-configured and ready to activate immediately when the primary suction aperture becomes blocked. This preliminary arrangement of alternative pathways ensures that suction pressure and cooling continue without interruption, as the peripheral pathway can take over the suction function automatically when the primary pathway is obstructed by tissue.
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 solution ensures consistent suction pressure and RF efficiency by providing alternative suction paths without reducing suction pressure or creating unwanted plasma, effectively addressing the limitations of prior art designs.
Implementation Method 1
a suction source, and an end effector... the end effector being capable of different operations including mechanical cutting of tissue, and electrosurgical ablation, sealing and/or coagulation of tissue
Data Source
AI summary
An electrosurgical instrument end effector includes an active electrode received by an insulating material, the active electrode including a primary suction aperture which provides access to a primary fluid channel extending from the active electrode, through the insulating material, to a lumen. The lumen is arranged to carry fluid to and from a surgical site when in use. The end effector further includes at least one additional fluid channel providing alternative access to the primary fluid channel from the active electrode, wherein the at least one additional fluid channel bypasses the primary suction aperture.