Catheter Recess Design for Functional Component Nesting
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Solution Overview
Problem
Conventional catheters with functional components, such as balloon guide catheters, face issues of degraded compatibility and accessibility due to the presence of these components, which can lead to clot fragmentation and reocclusion during thrombus removal procedures, posing risks to patients.
Innovation Solution
A catheter design featuring a tubular component with an outer and inner tube structure, including recesses that accommodate functional components like occlusion components, allowing for reduced joint thickness and improved flexibility, enabling smoother advancement through blood vessels while maintaining sufficient inner cavity size for medical device delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If functional components (balloon, occlusion elements) are attached to the catheter, then the catheter can perform thrombus removal and occlusion functions, but the compatibility and accessibility of the catheter are degraded
Solution Approach 1:
The functional components (balloon, occlusion elements) are nested within recesses of the catheter structure. The balloon is positioned within a recess formed by the outer tube and inner tube, while occlusion elements are disposed within recesses of the outer tube. This nesting approach allows the functional components to be integrated without significantly increasing the overall outer diameter, thereby maintaining accessibility while providing versatile functions.
Solution Approach 2:
The patent utilizes the radial dimension by creating recesses that extend into the wall thickness of the catheter tubes. Instead of adding functional components that increase the outer diameter (radial expansion), the components are accommodated within the existing wall structure through recesses, effectively using the radial dimension already available in the catheter wall to house additional functionality.
2Adaptability or versatility
If functional components are added to the catheter, then the catheter can occlude blood flow and remove thrombus, but the joint thickness increases and flexibility decreases
Solution Approach 1:
The functional components are nested within recesses that are formed as integral parts of the catheter tube walls. The balloon is nested within a recess defined by the outer tube and inner tube, and occlusion elements are nested within recesses of the outer tube. This integration minimizes the additional material required and maintains the flexibility of the catheter by avoiding thick external joints.
Solution Approach 2:
The recesses are strategically positioned and sized to provide local accommodation for functional components without compromising the overall flexibility of the catheter. The recesses are formed only where needed to house specific components, allowing the rest of the catheter wall to maintain its original thin, flexible structure. This localized modification approach preserves global flexibility while enabling local functionality.
Data Source
AI summary
A catheter includes a tubular component (100) and a functional component. The tubular component (100) includes an outer tube (101) and an inner tube (102). The outer tube (101) is sleeved over the inner tube (102), and a first lumen is formed between the outer tube (101) and the inner tube (102). The outer tube (101) includes an outer tube main segment (1011) and a first recess (1012). The first recess (1012) is located at a distal end of the outer tube main segment (1011). The functional component is disposed on the tubular component (100) and is at least partially connected to the first recess (1012). This arrangement imparts increased compatibility and higher accessibility to the catheter with the functional component.