Implantable Anchoring Device Shape Transition
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Solution Overview
Problem
Existing medical devices inserted into body cavities, such as the stomach, suffer from migration and lack long-term implantation stability due to insufficient anchoring mechanisms, leading to mobility issues.
Innovation Solution
An implantable device with a plurality of links that can transition between flexible and rigid modes, utilizing a device closure pin and lock-in unit to anchor itself within the body cavity, preventing mobility by exerting a stabilizing force without expanding the pylorus opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device is made rigid for anchoring, then implantation stability is improved, but insertion difficulty and patient discomfort increase
Solution Approach 1:
The device transitions from a flexible state during insertion to a rigid state after implantation. The links are initially movable relative to each other, allowing the device to conform to body contours during insertion. After deployment, the closure pin secures the links in a rigid configuration, providing long-term anchoring stability.
2Ease of operation
If the device is made flexible for insertion, then insertion ease is improved, but implantation stability deteriorates
Solution Approach 1:
The device dynamically changes its mechanical properties from flexible to rigid. During insertion, the links can move relative to each other, allowing the device to follow body contours. After implantation, the closure pin locks the links in a fixed rigid configuration, ensuring long-term stability and preventing migration.
3Reliability
If anchors are used to prevent migration, then implantation stability is improved, but device complexity increases
Solution Approach 1:
The anchoring function is merged with the structural links of the device. The links themselves serve dual purposes: providing the device structure and acting as anchors when secured in the rigid configuration. The closure pin simply connects the ends of the links, creating anchors without requiring separate anchor components.
4Reliability
If the device exerts outward force against the hollow body, then anchoring stability is improved, but harmful effects on the body increase
Solution Approach 1:
The device exerts minimal outward force during insertion while flexible, reducing tissue damage. After implantation, the rigid configuration provides anchoring stability through geometric interlocking and distribution of forces across multiple links, rather than relying on high outward expansion forces that could damage tissue.
Data Source
AI summary
A method of using an implantable device provides an implantable device including a plurality of links (113, 115, 117, 119), a device closure pin (111), a lock-in unit (103) attached and located between two links, and a quick release unit (105) attached and located between two links. The plurality of links (113, 115, 117, 119), lock-in unit (103) and release unit (105) are constructed in a closed contour. The closed contour of the implantable device, in a rigid state (151), is a figure eight comprised of two arcs (125, 127) and two connected interconnecting sections (131, 133).