Endoscopic Guide Sheath Protrusion for Paranasal Sinus Observation
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Solution Overview
Problem
Current endoscopic treatment instruments face challenges in accurately guiding and observing the distal end of the insertion portion within the nasal cavity, particularly in navigating through narrow paths and maintaining stability during procedures in the paranasal sinus.
Innovation Solution
The endoscopic treatment instrument incorporates a guide pipe and guide sheath with crooked portions that allow the insertion portion of the endoscope to protrude, enabling wider observation ranges and improved maneuverability, along with a system for suction and liquid supply, facilitating precise navigation and treatment within the paranasal sinus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light guide fiber is inserted through a guide pipe to guide light to the paranasal sinus, then the position of the distal end can be visually recognized through skin and bone, but the observation range and maneuverability in narrow paths are limited
Solution Approach 1:
The patent employs a nested structure where the insertion portion is inserted through the guide sheath, which is in turn inserted through the guide pipe. This multi-layer nesting allows the distal end of the insertion portion to protrude beyond the guide pipe's distal end, enabling observation and treatment in narrow paths while maintaining positional control through the outer guide structures
Solution Approach 2:
The patent introduces a protruding dimension by allowing the distal end of the insertion portion to extend beyond the distal end of the guide pipe. This dimensional extension enables the observation optical system to access areas that would otherwise be unreachable, expanding the observation range into previously inaccessible narrow paths
2Adaptability or versatility
If the distal end of the insertion portion protrudes relative to the guide pipe distal end to expand observation range, then wider observation and treatment ranges are achieved, but device complexity increases
Solution Approach 1:
The guide pipe and guide sheath serve multiple functions: they guide the insertion portion to the target location, provide structural support in narrow paths, enable protrusion for expanded access, and maintain stability during procedures. This multi-functionality reduces the need for separate specialized components, managing complexity while achieving versatile performance
3Stability of the object's composition
If guide pipe and guide sheath are used to stabilize the insertion portion, then navigation stability is improved, but the ability to navigate narrow paths is reduced
Solution Approach 1:
The guiding structure is segmented into multiple independent components: the guide pipe as the outermost structure, the guide sheath as an intermediate layer, and the insertion portion as the innermost element. This segmentation allows each component to contribute to stability while the cumulative length of all segments enables navigation through narrow paths that a single rigid structure could not access
Data Source
AI summary
An endoscopic treatment instrument includes a guide sheath. The guide sheath includes a second distal end, which has an inside diameter to insert the insertion portion therethrough so that the distal end of the insertion portion is configured to protrude relative to the second distal end. The guide sheath is inserted through the guide pipe so that the second distal end is configured to protrude relative to the first distal end of the guide pipe.