Macroporous Sensor Skin Implant With Reference Stripes for Uniform Readout
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Solution Overview
Problem
Existing implantable sensors for continuous biomarker monitoring suffer from variability in fabrication, leading to inconsistent measurement results and inadequate tissue integration, which complicates the detection of analytes and limits their effectiveness in applications like chronic disease management.
Innovation Solution
A sensor skin implant design featuring alternating reference and sensor stripes embedded in a bio-integrable macroporous hydrogel, utilizing plasmonic nanoparticles with specific binding sites, allows for a reflection-based optical signal read-out using a single or dual wavelength detection, ensuring uniform production and improved tissue integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If individual implants are assembled in a time-consuming fabrication process, then measurement artifacts from implant differences are reduced, but productivity decreases and manufacturing precision is compromised
Solution Approach 1:
The implant is divided into multiple sensor stripes and reference stripes that are alternately arranged. Each stripe is a discrete unit that can be independently fabricated and then assembled into the complete implant structure, enabling modular mass production while maintaining uniformity across all segments
Solution Approach 2:
The fabrication process parameters are standardized and optimized to enable consistent mass production. The macroporous hydrogel matrix and nanoparticle embedding parameters are controlled to produce uniform implants across large batches, transforming the process from custom assembly to standardized manufacturing
2Reliability
If individual implants are custom-assembled, then measurement artifacts are minimized, but the fabrication process becomes laborious and complex
Solution Approach 1:
By segmenting the implant into standardized sensor and reference stripe modules, the fabrication process is simplified into repetitive units that can be mass-produced using standardized procedures, reducing overall process complexity while maintaining measurement consistency
Solution Approach 2:
The macroporous hydrogel matrix serves multiple functions simultaneously: it provides structural support, enables analyte transport, facilitates tissue integration, and serves as the embedding medium for nanoparticles. This multi-functionality reduces the need for separate components and simplifies the overall fabrication process
3Reliability
If macroporous hydrogel is used for tissue integration, then analyte transport is improved, but fabrication uniformity becomes more difficult to achieve
Solution Approach 1:
The hydrogel fabrication parameters (composition, porosity, molecular weight) are precisely controlled and standardized to ensure uniform macroporous structure across all implants. This allows mass production while maintaining the necessary tissue integration and analyte transport properties
Solution Approach 2:
The macroporous hydrogel matrix is pre-fabricated with controlled porosity and structure before nanoparticle embedding. This preliminary preparation ensures uniform distribution of sensing elements and consistent tissue integration characteristics across all implants, simplifying subsequent assembly steps
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 design provides robust, uniform, and cost-effective analyte detection with reduced systematic errors, enabling continuous monitoring of biomarkers in vivo with enhanced signal-to-noise ratio and simplified fabrication.
Implementation Method 1
the nanoparticles of the sensor stripes are coupled to or coated with a receptor bearing specific binding sites for an analyte
Implementation Method 2
receptor bearing specific binding sites for an analyte
Implementation Method 3
the integration of the implant into the host tissue must be ensured for every single case to guarantee unrestricted analyte transport to the sensor
Implementation Method 4
a new method for detecting the presence of an analyte with such a sensor skin implant that shows a better or easier sensor read-out
Data Source
Figure 1~2e
Figure 3~4e
Figure 5~6c
AI summary
The invention relates to a sensor skin implant, a method for detecting the presence of an analyte with such a sensor skin implant and a method for manufacturing of such a sensor skin implant. Implantable sensors can accompany medical treatments, easing the life of both physicians and patients by providing a comfortable way of continuously monitoring biomarkers without needing to take blood samples. For ideal sensor read-out and comparison of measurement results between patients, the individual implants must be as uniform as possible to exclude the influence of measurement artifacts caused by differences between implants. Additionally, the integration of the implant into the host tissue must be ensured for every single case to guarantee unrestricted analyte transport to the sensor and prevent non-working implants. The object of the invention was in particular to find a new fabrication approach to produce nanoparticle-based macroporous implants enabling mass production with improved implant quality and a new method for detecting the presence of an analyte with such a sensor skin implant that shows a better or easier sensor read-out. The invention solves this task particularly with a sensor skin implant comprising a plurality of alternating reference stripes and sensor stripes that are arranged next to each other to form a repetition unit, wherein the sensor stripes and references stripes are embedded in a bio-integrable macroporous hydrogel and are equipped with one type of nanoparticles, wherein the nanoparticles of the sensor stripes are coupled to or coated with a receptor bearing specific binding sites for an analyte.