Eccentric Endoscope Hood for Mucosal Dissection
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Solution Overview
Problem
Endoscopic submucosal resection faces challenges in applying tensile force to peel mucosa from the muscle layer due to the limited size of existing endoscope forceps apertures and the difficulty of the endoscope hood in navigating between the mucosa and muscle layer, leading to increased risk of perforation and impaired operability.
Innovation Solution
An endoscope hood with a tapered shape and eccentrically arranged optical systems, allowing the hood to fit between the mucosa and muscle layer while maintaining excellent endoscope vision and enabling easier application of tensile force for mucosal dissection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a straight-cylindrical endoscope hood is used, then the hood structure is simple, but it cannot easily get between the mucosa and muscle layer to apply tensile force
Solution Approach 1:
The endoscope hood is designed with a curved surface instead of a straight cylindrical shape. The curved surface allows the hood to easily penetrate between the mucosa and muscle layer, enabling effective application of tensile force during endoscopic submucosal resection while maintaining structural simplicity
2Ease of operation
If the endoscope hood tapers off toward the tip end with eccentric optical system, then the hood can easily navigate between tissues, but a linear route cannot be secured from treatment tool outlet to treatment site
Solution Approach 1:
The endoscope hood employs an asymmetric design where the optical system is positioned eccentrically relative to the hood's central axis. This asymmetric arrangement allows the hood to effectively navigate between tissues while the treatment tool outlet is positioned to maintain a linear route to the treatment site, resolving the contradiction between navigation ability and tool operability
3Device complexity
If only one forceps aperture is provided, then the endoscope structure is simple, but grasping forceps are unavailable to apply tensile force to living tissue
Solution Approach 1:
The endoscope is equipped with multiple forceps apertures instead of a single aperture. This segmentation allows different types of forceps to be used simultaneously or alternatively, enabling effective application of tensile force to living tissue during endoscopic submucosal resection while maintaining relatively simple overall structure
Data Source
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AI summary
An endoscope hood (1) has a cylindrical shape with both ends opened and is mounted on a tip end portion (3) in a longitudinal axis direction of an endoscope (2) provided with an optical system at least including an observation system (5) and a treatment system to be used. The endoscope hood (1) is provided with an endoscope mounting unit (18) having a base end side opening (21) configured to be mounted on the tip end portion (3) of the endoscope (2) and a hood main body (17) having a tip end side opening (10) of which outer diameter perpendicular to the longitudinal axis direction is smaller than the outer diameter of the base end side opening (21), wherein, in a state in which the base end side opening (21) is mounted on the tip end portion (3) and the tip end portion (3) is seen in the longitudinal axis direction, the optical system and the treatment system are located on the inside of the tip end side opening (10).