Endoprosthesis Deployment Device with Integrated Filamentary Traction Loop
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Solution Overview
Problem
Existing devices for deploying and retracting tubular endoprostheses in blood vessels have complex structures that compromise the reliability of the release operation.
Innovation Solution
A device with a permanently fixed support and filamentary connections that form a traction loop, allowing for precise positioning and reversible deployment of the endoprosthesis, using a rigid rod with a hook member for engagement and release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the endoprosthesis is retained by two separate filamentary connections with separate supports, then the endoprosthesis can be securely held in the retracted state, but the device structure becomes complex and the release operation reliability is compromised
Solution Approach 1:
The patent merges two separate filamentary connections and their associated supports into a single integrated filamentary connection system. The single connection includes a clamping portion that engages the endoprosthesis and a control portion that extends through a single support structure, eliminating the complexity of coordinating two separate systems while maintaining secure retention and reliable release capability.
Solution Approach 2:
The single filamentary connection serves multiple functions: it simultaneously provides structural support, retains the endoprosthesis in the retracted state, and enables controlled deployment. The integrated design allows one connection system to perform what previously required two separate systems, simplifying the overall device architecture.
2Ease of operation
If the support is permanently fixed to the endoprosthesis, then the release operation becomes simpler and more reliable, but the ability to adjust positioning is reduced
Solution Approach 1:
The filamentary connection is designed with dynamic characteristics that allow it to transition between different states. During deployment, the connection can be selectively loosened or tightened by manipulating the control portion, enabling adjustment of the endoprosthesis positioning. Once positioned, the connection can be secured to maintain the desired configuration, providing both adjustability and stability.
Solution Approach 2:
The permanent fixation of the support to the endoprosthesis creates a self-contained system where the filamentary connection automatically maintains its function throughout the deployment process. The control portion allows the operator to manipulate the system without requiring additional components or complex mechanisms, enabling both positioning adjustment and secure retention through the same integrated structure.
Data Source
AI summary
A tubular endoprosthesis can be radially deployed between a retracted state and an expanded state. It includes an axially rigid support which has at least one retention opening. The device further includes at least one filamentary connection which has a region for clamping the endoprosthesis, at least partially surrounding the endoprosthesis, and a control region which is connected to the clamping region via the retention opening. The support is permanently fixed to the endoprosthesis.