Bioabsorbable Coating for In-Vivo Sensor Sterilization Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In-vivo sensors face challenges in sterilization due to unstable thin organic films and fouling over time, despite non-fouling coatings, which affect their functionality and longevity.
Innovation Solution
A bioabsorbable polymeric coating is applied to protect the sensor surface during sterilization and implantation, desorbing at controlled times to expose the sensing surface to the biological environment, allowing for controlled introduction and prolonged functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a thin organic film is used as the sensing surface, then the sensor can detect analytes effectively, but the film becomes unstable during sterilization and degrades over time
Solution Approach 1:
The sensing surface is segmented into two distinct layers: a stable inorganic substrate layer that provides sterilization resistance, and a thin organic sensing film layer that provides analyte detection capability. This segmentation allows each layer to perform its specialized function without compromising the other.
Solution Approach 2:
The inorganic substrate layer is prepared in advance with surface properties that resist sterilization degradation. This preliminary preparation of the substrate creates a stable foundation that protects the organic sensing film during subsequent sterilization processes, preventing the film from degrading before it is needed for sensing.
2Measurement precision
If non-fouling compounds are added to prevent nonspecific binding, then sensor selectivity improves, but the sensor still experiences fouling over time affecting functionality
Solution Approach 1:
The invention changes the fundamental parameter of the substrate material from organic to inorganic, which fundamentally alters the surface properties. This parameter change creates a permanently stable surface that resists fouling accumulation over time, complementing the non-fouling compounds and extending the sensor's functional longevity while maintaining selectivity.
3Loss of time
If the sensing surface is exposed immediately after fabrication, then the sensor can begin monitoring, but the sensor is vulnerable to fouling and degradation during implantation
Solution Approach 1:
The inorganic substrate layer is prepared in advance with protective surface properties before the organic sensing film is applied. This preliminary preparation creates a protected foundation that shields the sensing surface during implantation and initial deployment, allowing the sensor to begin monitoring sooner while maintaining reliability during the vulnerable implantation period.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The bioabsorbable coating enables effective sterilization, protects the sensor during implantation, and extends the sensor's functional lifetime by exposing the sensing surface at predetermined times, mitigating fouling and enabling staggered sensor activation for continuous monitoring.
Implementation Method 1
coating the sensing surface of the sensor with a bioabsorbable polymeric coating including a bioabsorbable polymer; wherein the bioabsorbable polymeric coating is configured to protect the in-vivo sensor until needed for implantation
Data Source
AI summary
A method of protecting an in-vivo sensor includes forming a sensing surface on a surface of the in-vivo sensor, the sensing surface including a functionalized monolayer that will bind to an analyte of interest; and coating the sensing surface of the sensor with a bioabsorbable polymeric coating including a bioabsorbable polymer; wherein the bioabsorbable polymeric coating is configured to protect the in-vivo sensor until needed for implantation.