Implantable Sensor Bridge for Vessel Wall Displacement
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Solution Overview
Problem
Current implantable sensors face challenges in maintaining accurate readings due to cellular ingrowth and interference from the vessel wall, as existing anchoring systems do not allow for sufficient displacement of the sensor from the vessel wall, leading to inaccurate measurements and potential cellular or plaque buildup.
Innovation Solution
An implantable device comprising an expandable anchor and a bridge that compresses during delivery and expands at the target site, positioning the sensor away from the vessel wall, allowing for accurate measurements and minimizing interference, with the bridge bowing into the lumen to keep the sensor distanced from the wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor is attached directly to the anchor, then the device structure is simple, but the sensor cannot be displaced from the vessel wall leading to inaccurate measurements and cellular buildup
Solution Approach 1:
The device is divided into three functional segments: the anchor for securing to the vessel wall, the bridge as an intermediate connecting element, and the sensor for measurement. This segmentation allows each component to perform its specific function independently, with the bridge providing the necessary displacement to keep the sensor away from the vessel wall while maintaining structural connection.
Solution Approach 2:
The bridge acts as an intermediary element between the anchor and the sensor. It mediates the spatial relationship by bowing into the lumen, thereby displacing the sensor from the vessel wall. This intermediary structure resolves the contradiction by providing both mechanical connection and spatial separation simultaneously.
2Reliability
If the sensor is positioned close to the vessel wall, then the device structure is simple, but cellular ingrowth and plaque buildup interfere with accurate readings
Solution Approach 1:
The bridge serves as a protective intermediary that physically separates the sensor from the vessel wall environment. By bowing into the lumen, it creates a protective distance that prevents cellular ingrowth and plaque buildup from reaching the sensor, thereby ensuring reliable readings over time.
Solution Approach 2:
The bridge is pre-configured with a bowed shape that automatically positions the sensor away from the vessel wall upon deployment. This preliminary geometric configuration ensures protective spacing is established immediately upon implantation, preventing cellular interference before it can occur.
3Reliability
If the anchor is expanded to press against the vessel wall for stable positioning, then the anchor remains securely positioned, but the sensor attached to it cannot be displaced from the wall
Solution Approach 1:
The device segments the positioning and measurement functions: the anchor segment presses against the vessel wall to provide stable positioning, while the sensor segment, connected via the bridge, is displaced into the lumen for accurate measurements. This functional segmentation resolves the contradiction between stable anchoring and accurate sensing.
Solution Approach 2:
The bridge utilizes the radial dimension by bowing into the lumen, creating spatial separation in the radial direction while maintaining longitudinal connection. This dimensional approach allows the sensor to be positioned away from the vessel wall surface while remaining securely attached through the anchor-bridge-sensor structure.
Data Source
AI summary
This invention relates to an implantable device for a physiologic sensor, comprising an implantable expandable anchor, a bridge on which the sensor is secured, as well as an optional adapting ring. The invention also relates to a method of monitoring bodily functions using the anchor and sensor. The anchor is compressed and the bridge assumes an elongated shape during delivery to a target lumen. Upon deployment at the target site, the anchor expands and the bridge bows into the interior lumen of the expanded anchor, distancing the sensor from the vessel wall. This invention also relates to a method of manufacturing said device and a method of implanting a sensor.