Endoscopic Tube Set With Non-Round Position Limiting Component
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Solution Overview
Problem
Conventional endoscopic tube sets are unable to prevent the working element from rotating in the working channel of the catheter, leading to potential lesion orientation misjudgment.
Innovation Solution
The endoscopic tube set incorporates a position limiting component with a non-round position limiting opening and corresponding guiding elements, paired with a working element having a matching cross-section and positioning marks, to prevent rotation within the catheter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional endoscopic tube set uses a round working channel opening, then the working element can be easily inserted, but the working element may rotate within the catheter causing lesion orientation misjudgment
Solution Approach 1:
The position limiting component features a non-circular opening with guiding elements that have asymmetric cross-sections (e.g., flat or ridged surfaces). The working element corresponds with matching asymmetric geometry. This asymmetric design allows easy insertion while preventing rotation, as the asymmetric shapes can only fit together in one specific orientation, thereby eliminating lesion orientation misjudgment.
2Measurement precision
If a position limiting component with non-round opening is added, then rotation is prevented, but device complexity increases
Solution Approach 1:
The position limiting component is designed as a separate, modular element that can be independently manufactured and attached to the catheter. This segmentation allows the complex non-circular geometry to be produced using standard manufacturing techniques and simplifies assembly, reducing overall device complexity while maintaining orientation accuracy.
Solution Approach 2:
The non-circular opening and guiding elements are only introduced at the specific location where orientation control is needed (the position limiting component), while the rest of the catheter and working element maintain simple, standard designs. This localized application of complexity minimizes overall device complexity while achieving the goal of preventing rotation.
Data Source
AI summary
An endoscopic tube set includes an endoscopic tube including a body; a catheter connected to the body, having therein one single working channel, having a proximal opening proximal to the body, and having a distal opening distal to the body; and a position limiting component fitted to the distal opening of the catheter, having a position limiting opening not round in shape, and having a position limiting mark; and a working element having a cross section corresponding in shape to the position limiting opening of the position limiting component and having at least one positioning mark. The endoscopic tube set is suitable for observing, sampling and/or treating pulmonary lesions.