Electrode Assembly Suction Lumen Fluid Temperature Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In electrosurgical endoscopic procedures, achieving effective fluid circulation at the surgical site is challenging, leading to potential tissue damage from excessive fluid temperatures, and increasing fluid flow rates can hinder electrode functionality.
Innovation Solution
An electrode assembly with a suction lumen integrated into the arm of the electrosurgical instrument, which extracts heated fluid from the vicinity of the tissue treatment element, preventing tissue damage without requiring high fluid flow rates, and includes a hollow tube providing structural support, electrical connection, and suction functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the flow rate of the fluid circulating through the surgical site is increased to reduce fluid temperature, then tissue damage from excessive fluid temperatures is avoided, but the electrode becomes incapable of functioning correctly due to plasma formation disruption
Solution Approach 1:
The fluid circulation system is segmented into two distinct pathways: a general circulation system for bulk fluid removal and temperature control, and a localized suction lumen system positioned at the electrode tip for immediate evacuation of heated fluid. This segmentation allows independent optimization of each system - the general circulation maintains acceptable average temperatures while the localized suction prevents plasma disruption by removing hot fluid directly at the electrode interface.
Solution Approach 2:
The suction lumen acts as an intermediary element between the electrode and the bulk fluid circulation system. It provides a direct communication channel from the electrode vicinity to the external suction source, enabling selective removal of heated fluid without requiring high flow rates through the entire circulation system. This intermediary structure resolves the contradiction by decoupling the temperature control function from the electrode operation function.
2Adaptability or versatility
If a remote patient return plate is used in monopolar surgery, then the return electrode is provided away from the surgical site, but fluid circulation effectiveness at the surgical site remains difficult to achieve
Solution Approach 1:
The electrode assembly integrates multiple functions into a single unified structure: the electrode shaft serves as both the electrical conductor and the housing for the suction lumen, while the suction lumen provides both fluid evacuation and structural support. This multi-functional design allows the same assembly to work effectively with both monopolar (with remote return plate) and bipolar (with local return electrode) configurations, while simultaneously providing effective fluid circulation at the surgical site through the integrated suction capability.
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 suction lumen effectively removes heated fluid, preventing tissue damage while allowing the electrode to function correctly, maintaining efficient tissue treatment without the need for high fluid flow rates.
Implementation Method 1
the suction lumen is capable of extracting fluid from the immediate vicinity of the tissue treatment element
Implementation Method 2
first connection means for connecting the arm to a source of electrosurgical energy
Data Source
AI summary
An electrode assembly (17) is provided for use in a resectoscope, the electrode assembly (17) comprising an elongate shaft (33), at least one arm (33), first connection means (4) for connecting the arm to a source (1) of electrosurgical energy, and a tissue treatment element (26) at the end of the arm. The arm includes a suction lumen (34) extending from a proximal end to a distal end, the distal end of the suction lumen (34) terminating in the general region of the tissue treatment element (26), and the proximal end of the suction lumen including second connection means for connecting the suction lumen to a source of suction.