Covered Stent With Flexible Side Branches For Vascular Alignment
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Solution Overview
Problem
Current vascular medical devices, such as modular covered stents, face challenges in precise alignment with side branch vessels during implantation, leading to misalignment, kinking, reduced blood flow, and increased risk of vessel damage, along with lengthy and complex procedures that expose patients and operators to excessive radiation and contrast media.
Innovation Solution
A novel covered stent system with flexible and expandable side branches and a guiding element allows for individual positioning and delivery of side vessel stent branches, reducing operation time and radiation exposure, and enabling simpler implantation procedures by facilitating alignment and connection of stent modules with reduced risk of complications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If modular covered stents with open circular apertures are used for alignment with side branch vessels, then the device can provide liquid communication between main vessel and side branches, but the open apertures may tear or damage the delicate vessel wall during navigation and implantation
Solution Approach 1:
The patent employs a covered stent design where the aperture is sealed with a flexible membrane or thin film covering that can conform to the vessel wall. This flexible cover protects the delicate vessel wall from damage by open apertures while still allowing controlled liquid communication when needed, resolving the contradiction between adaptability and harm prevention.
2Strength
If the main vessel covered stent is expanded and deployed, then the stent provides structural support, but the stent cannot be re-positioned and misaligned apertures cause kinking of branch vessel covered stent
Solution Approach 1:
The patent incorporates a dynamic repositioning mechanism that allows the main vessel covered stent to be adjusted and repositioned after initial deployment but before final fixation. This dynamic capability enables correction of misalignment issues while maintaining the structural support function, resolving the contradiction between strength and ease of operation.
3Reliability
If traditional modular covered stent implantation procedures are used, then the procedure can treat vascular disease, but the operation time becomes very long increasing patient risk and radiation exposure
Solution Approach 1:
The patent employs preliminary action by pre-assembling and pre-positioning the main vessel covered stent with accurately positioned apertures before introducing the branch vessel covered stents. This preliminary preparation reduces the complexity and time required for the actual implantation procedure, maintaining treatment efficacy while significantly reducing operation time and associated risks.
4Measurement precision
If open circular apertures are used in modular covered stents, then the apertures can align with side branch vessels, but the apertures pose risk of damaging vessel walls when navigating side branch vessel into place
Solution Approach 1:
The patent uses a covered aperture design where a flexible membrane seals the aperture opening. This flexible cover maintains precise aperture alignment for liquid communication while protecting the vessel wall from damage during navigation and implantation, effectively resolving the contradiction between measurement precision and harm prevention.
Data Source
AI summary
The present application discloses a covered stent and a method for navigating the covered stent to a branch vessel, the covered stent including a main body and at least one lateral side branch connected to the main body. A system of covered stents and a method for implanting, including interconnecting the covered stents is also disclosed.