Intraluminal Device Core Fixation Against Peristalsis
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Solution Overview
Problem
Intraluminal devices face challenges with distal migration due to peristalsis, and existing fixation methods are either temporary or require tissue ingrowth, which can be slow and may not provide immediate or long-term effective solutions for device stability.
Innovation Solution
An intraluminal device with a wall configured to fit a lumen and at least one core that is removably connected to the wall, allowing tissue to envelop the core during deployment, providing both short-term and long-term fixation against distal migration through tissue ingrowth and the use of fasteners like sutures or clips for immediate fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tissue ingrowth is used for fixation, then long-term stability is improved, but the time required for fixation is increased
Solution Approach 1:
The patent applies preliminary action by using fasteners (clips or sutures) to provide immediate fixation of the intraluminal device to the lumen wall before tissue ingrowth occurs. This preliminary mechanical anchoring ensures the device remains stationary during the subsequent tissue integration period, resolving the contradiction by addressing the time delay issue while maintaining long-term stability through the planned tissue ingrowth process.
2Reliability
If fasteners are used for immediate fixation, then short-term stability is improved, but the complexity of the device is increased
Solution Approach 1:
The patent applies segmentation by dividing the fixation function into two separate components: fasteners (clips or sutures) for immediate short-term fixation, and tissue ingrowth for long-term fixation. This segmentation allows each component to specialize in its specific time frame, providing simple yet effective short-term stability without requiring a single complex fixation mechanism to handle both immediate and long-term requirements simultaneously.
3Strength
If the core is permanently fixed to the wall, then fixation strength is improved, but the ease of explantation is worsened
Solution Approach 1:
The patent applies dynamics by making the connection between the core and wall portion adjustable rather than fixed. The core can be selectively connected to provide strong fixation when needed, and selectively disconnected to enable easy explantation. This dynamic connection allows the system to transition between fixed and removable states, resolving the contradiction between maintaining strong fixation and enabling easy removal when the device needs to be explanted.
Data Source
AI summary
An intraluminal device adapted to be positioned in a lumen that experiences peristalsis and method of fixation of an intraluminal device in the lumen, includes a wall configured to the size and shape of a portion of the lumen and at least one core. The at least one core is removably connected with a portion of the device wall. The at least one core is configured to be positioned against the lumen when the wall is positioned in the lumen. In this manner tissue envelopes the core during implantation of the intraluminal device. The at least one core is configured to be axially removable in situ from the tissue enveloping the core after the device has been deployed by disconnecting the core from the portion of the wall in order to explant the intraluminal device from lumen.