Retractable Cutting Electrode for Endoscope Tissue Control
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Solution Overview
Problem
Current endoscopic surgery devices face challenges in applying traction to body tissue during cutting procedures, leading to imprecise and cumbersome manipulation of cutting electrodes, which can result in damage to unintended tissues and poor control over the cutting direction.
Innovation Solution
A treatment device for endoscopes featuring a retractable cutting electrode with a preformed spring configuration that can be hooked onto body tissue, allowing for controlled traction and precise cutting by pulling the electrode back into the catheter while applying RF electrosurgical current, with optional restraint instruments like grasping forceps or snares to secure the tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a cutting electrode is used for endoscopic surgery, then tissue cutting capability is achieved, but control over cutting direction and precision is poor
Solution Approach 1:
The cutting electrode is pre-formed with a bent configuration that allows it to be hooked onto the tissue before cutting. This preliminary hooking action secures the tissue and establishes the cutting path, improving precision before the actual cutting begins
Solution Approach 2:
The cutting electrode employs a bent or curved configuration rather than a straight design. This curvature allows the electrode to hook onto tissue and follow anatomical contours, providing better control over cutting direction and improving precision while maintaining ease of manipulation
2Measurement precision
If traction is applied to body tissue during cutting, then cutting precision improves, but manipulation becomes more cumbersome
Solution Approach 1:
The device combines the cutting electrode with a restraint instrument (such as forceps or a snare) into a single integrated system. The restraint instrument applies traction to the tissue while the cutting electrode simultaneously performs the cutting, eliminating the need for separate manipulation of multiple devices and maintaining ease of operation
Solution Approach 2:
The cutting electrode is designed to perform multiple functions: it can hook onto tissue for traction, maintain that traction during the procedure, and perform the cutting action. This multi-functionality consolidates several operations into one device, improving precision without adding manipulative complexity
3Length of moving object
If the cutting electrode is retracted into the catheter, then device profile is reduced for endoscope passage, but the electrode loses its functional configuration
Solution Approach 1:
The cutting electrode is designed with dynamic properties that allow it to change shape based on its position. When retracted into the catheter, it assumes a compact linear configuration for easy passage. When deployed, it transitions to a bent or hooked configuration for cutting, and can be dynamically adjusted during the procedure to maintain optimal shape
4Measurement precision
If a restraint instrument is added to secure the cutting electrode, then control and precision improve, but device complexity increases
Solution Approach 1:
The restraint instrument and cutting electrode are merged into a single integrated device with shared control mechanisms. The operator controls both the restraint and cutting functions through one handle system, reducing the perceived complexity despite the enhanced functionality and precision
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 controlled cutting of body tissue with improved traction, reducing the risk of damaging adjacent tissues and enhancing operational ease by allowing for clear visualization and defined movement of the cutting electrode.
Implementation Method 1
The cutting electrode elastically deforms in a state where the cutting electrode is retracted into the catheter, thereby assuming the shape of the catheter
Implementation Method 2
by pulling the electrode back into the catheter while applying RF electrosurgical current
Data Source
AI summary
This treatment device for endoscope is used for cutting body tissue while the treatment device is retractably projected from a catheter. The treatment device includes: a control wire inserted into the catheter; and a cutting electrode mounted at the distal end of the control wire with the cutting electrode being imparted a bent configuration in advance. The cutting electrode elastically deforms in a state where the cutting electrode is retracted into the catheter, thereby assuming such a shape as to resemble the configuration of the catheter.