Imaging Catheter Tip-Lumen Structure for Larger Instrument Passage
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Solution Overview
Problem
Existing imaging catheters and working lumens are not compatible with a wide variety of surgical instruments due to structural limitations that create drops or gaps, preventing instruments with larger diameters from being effectively used.
Innovation Solution
The design of the imaging catheter includes a tube body and tip with specific wall configurations that eliminate drops by ensuring the radial distance between key points is greater than or equal to the inner diameter of the lumens, allowing instruments with larger diameters to enter and pass through smoothly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the traditional lumen structure with drops is used, then the structure is simple to manufacture, but the compatibility with surgical instruments with larger diameters is poor
Solution Approach 1:
The lumen structure is divided into multiple segments including a first lumen in the tube body and a second lumen in the tip, connected through notches. This segmentation allows each segment to be optimized independently while maintaining overall compatibility with various surgical instruments.
Solution Approach 2:
The imaging catheter is designed with a universal lumen structure that can accommodate multiple types of surgical instruments with different diameters. The multi-lumen design and strategic placement of notches create a standardized interface that works with various instruments, enhancing versatility.
2Adaptability or versatility
If the lumen inner diameter is increased to accommodate larger instruments, then the compatibility improves, but the structural precision requirements increase
Solution Approach 1:
By dividing the lumen into separate sections (first lumen in tube body, second lumen in tip) connected by notches, the manufacturing precision requirement for each individual component is reduced. Each segment can be manufactured within standard tolerances, and the overall precision is achieved through the assembly of these segments.
Solution Approach 2:
The notches act as intermediary elements that connect the first and second lumens. These notches provide a tolerance buffer zone that accommodates dimensional variations, reducing the overall precision requirements while maintaining instrument compatibility.
3Adaptability or versatility
If the multi-lumen structure with notches is implemented, then the instrument compatibility is improved, but the manufacturing complexity increases
Solution Approach 1:
The imaging catheter is manufactured as separate components (tube body with first lumen, tip with second lumen) that are then assembled together. This segmentation allows each component to be manufactured using standard processes, reducing overall manufacturing complexity compared to creating a single complex multi-lumen structure.
Solution Approach 2:
The notches are designed to be positioned such that they align during assembly, merging the first and second lumens into a continuous pathway. This merging approach simplifies the manufacturing process by allowing separate fabrication of components that are then easily combined.
Data Source
AI summary
An imaging catheter, a tip, a tube body and a medical device, relating to the field of medical instruments, where the imaging catheter includes a tube body and a tip, the tube body includes a first shuttling wall and a second shuttling wall, a first lumen is formed between the first shuttling wall and the second shuttling wall, the tip includes a first mounting wall and a second mounting wall, and a second lumen is formed between the first mounting wall and the second mounting wall. The second lumen is communicated with the first lumen, and a proximal end of the first mounting wall corresponds between the first shuttling wall and the second shuttling wall. A radial distance between a point m and a point n is a, and an inner diameter of the first lumen is b, where a≥b.