Dual-Function Polyurethane Membranes for Analyte Flux and Interferent Blocking
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Solution Overview
Problem
Current continuous analyte monitoring systems face challenges in effectively blocking interferents and controlling analyte flux due to the complexity of polymer blends used in resistance and interference layers, which introduce additional manufacturing steps and inefficiencies.
Innovation Solution
The development of polyurethane, poly(urea-urethane), or poly(thiourethane-urethane) layers with specific repeating structures and functional groups, such as zwitterionic moieties, to control analyte and interferent flux, providing improved layer uniformity and interferent blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymer blends are used in resistance and interference layers, then analyte flux control and interferent blocking are achieved, but manufacturing complexity and process steps increase
Solution Approach 1:
The patent combines the interference layer and resistance layer into a single integrated membrane layer containing both hydrophobic polymer (for interferent blocking) and hydrophilic polymer (for analyte flux control). This merging eliminates the need for separate discrete layers, reducing manufacturing steps while maintaining both interferent blocking and analyte flux control functions.
Solution Approach 2:
The integrated membrane layer performs multiple functions simultaneously: it blocks interferents through the hydrophobic polymer matrix, controls analyte flux through the hydrophilic polymer channels, and provides structural support. This multi-functional design replaces what would traditionally require separate specialized layers.
2Reliability
If polymer blends are used in resistance and interference layers, then analyte flux control and interferent blocking are achieved, but manufacturing steps and process time increase
Solution Approach 1:
By integrating both interference blocking and analyte flux control functions into a single membrane layer, the patent reduces the number of deposition steps from two separate layer applications to one integrated layer formation process, thereby improving manufacturing efficiency and productivity.
Solution Approach 2:
The membrane is designed with pre-integrated functional components where the hydrophobic and hydrophilic polymers are combined in a single structure before application. This preliminary integration of functions into one layer reduces on-site manufacturing steps and process time.
3Reliability
If discrete interference layer and resistance layer are used, then interferent blocking and analyte flux control are achieved, but layer uniformity decreases
Solution Approach 1:
The patent merges the discrete interference layer and resistance layer into a single integrated membrane with uniform thickness. This integration eliminates the interfaces between separate layers, ensuring consistent properties throughout the membrane and improving manufacturing precision and layer uniformity.
Solution Approach 2:
The integrated membrane design creates a homogeneous structure where hydrophobic and hydrophilic polymers are distributed throughout a single layer, ensuring uniform interferent blocking and analyte flux control properties across the entire membrane surface, unlike discrete layers that may have interface variations.
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 solution enhances the ability to attenuate interferent and analyte flux, improving the accuracy and reliability of continuous analyte monitoring by simplifying manufacturing and enhancing layer uniformity.
Implementation Method 1
a polyurethane containing block copolymer... configured to control a flux of at least one analyte in vivo
Data Source
AI summary
Polymers with analyte diffusion resistance and interferent blocking functionality and improved layer uniformity for analyte monitoring are described. Methods of synthesizing such polymers, methods of providing analyte diffusion and interferent blocking and analyte monitoring systems comprising such polymers are provided.