Venous Catheter Sealer with Coaxial Guide Passage
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Solution Overview
Problem
Current venous catheters face challenges with blood coagulation and thrombosis during long-term indwelling, especially when not in use for infusion, leading to potential life-threatening complications like pulmonary embolism, and existing occluding wire systems struggle to enter the catheter lumen effectively due to lack of a coaxial guide structure.
Innovation Solution
The occludable venous catheter device incorporates a guide passage that is coaxial with the venous catheter, allowing the occluding wire to enter smoothly and occlude the front-end opening, featuring a sealer with a deformable or hard component to ensure isolation and facilitate the occluding wire's movement, and includes a heat generating element to prevent coagulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an occluding wire is used to seal the venous catheter, then blood coagulation and thrombosis are prevented, but the occluding wire cannot smoothly enter the catheter lumen without a coaxial guide structure
Solution Approach 1:
A guide passage is introduced as an intermediary structure that facilitates the entry of the occluding wire into the catheter lumen. The guide passage serves as a mediator between the external environment and the catheter interior, providing a controlled pathway that enables smooth wire insertion while maintaining catheter integrity.
Solution Approach 2:
The catheter system is segmented into distinct functional components: the catheter body, the guide passage, and the occluding wire. This segmentation allows each component to perform its specific function independently - the guide passage handles wire insertion while the occluding wire performs the sealing function, resolving the operational difficulty.
2Ease of operation
If a guide passage is added to facilitate occluding wire entry, then wire insertion is improved, but the device structure becomes more complex
Solution Approach 1:
The guide passage is merged with the catheter base structure, integrating the guiding function into an existing component rather than adding a completely separate element. This combining approach provides the necessary wire guidance capability while minimizing overall structural complexity.
Solution Approach 2:
The guide passage serves multiple functions: it guides the occluding wire into the catheter lumen, maintains structural integrity of the catheter base, and provides a sealed pathway that prevents contamination. This multi-functionality justifies the added structure by delivering multiple benefits from a single component.
3Ease of operation
If the guide passage is made coaxial with the venous catheter, then occluding wire entry is facilitated, but the sealer structure becomes more complex
Solution Approach 1:
The guide passage is pre-positioned in a coaxial arrangement with the catheter during the manufacturing process. This preliminary positioning ensures proper alignment is achieved before the catheter is put into use, eliminating the need for complex adjustment mechanisms and simplifying the overall sealer structure.
Solution Approach 2:
The coaxial alignment is implemented specifically at the critical location where the guide passage intersects with the catheter axis. This localized application of precision alignment provides the necessary functional benefit without requiring complex coaxial structures throughout the entire sealer assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively prevents thrombosis by occluding the venous catheter opening, reduces the risk of blood coagulation, and ensures safe and active blood return, minimizing the risk of infection and thrombus formation while allowing for reliable medical fluid infusion and extraction.
Implementation Method 1
includes a heat generating element to prevent coagulation
Data Source
AI summary
An occludable venous catheter device includes a needle tube with a needle tube base; a venous catheter with a venous catheter base; a sealer, a front portion disposed inside a venous catheter lumen, a front end exposed out of a front-end opening; an occluding wire; an isolating element; a guide passage with a straight tube portion; a front-end opening connected to the venous catheter lumen; wherein the occluding wire is capable of entering the venous catheter lumen; the straight tube portion is coaxial with the venous catheter or is capable of moving in an externally-isolated manner to a position such that a central axis of the straight tube portion coincides with a central axis of the venous catheter; the occluding wire and the guide passage reach directly inside a chamber and are isolated from the outer environment.