Gas-Permeable Packaging for Glucose Sensor Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional packaging methods for glucose sensors using sealed plastic bags trap volatile substances and gases, leading to sensor drift and instability due to interactions with the glucose oxidase enzyme, requiring frequent calibration and potentially degrading the sensor's accuracy over time.
Innovation Solution
A packaging method using a gas-permeable sealing material in a package tray that allows volatile substances to vent out, maintaining sterility while preventing contaminants from entering, thereby reducing sensor drift and enhancing stability and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealed plastic bag is used to package the glucose sensor, then sterility is maintained, but volatile substances trap inside causing sensor drift and instability
Solution Approach 1:
The packaging uses a gas-permeable membrane that allows volatile substances to pass through while maintaining the sterile barrier function. The membrane's porous structure enables selective permeability - blocking microorganisms while allowing small volatile molecules to escape, thus resolving the contradiction between maintaining sterility and preventing volatile substance accumulation.
Solution Approach 2:
The packaging system employs a composite structure combining a sterile barrier layer with a gas-permeable membrane layer. This composite material approach allows the packaging to simultaneously provide sterility protection and volatile substance venting, addressing both requirements without compromising either function.
2Measurement precision
If a sealed package is used, then protection from contaminants is provided, but sensor accuracy degrades over time due to trapped volatiles
Solution Approach 1:
The gas-permeable membrane continuously allows volatile substances to escape during the sensor's shelf life, preventing accumulation that would degrade accuracy. This ensures the sensor maintains measurement precision throughout its intended duration without requiring frequent recalibration.
Solution Approach 2:
The packaging design extracts harmful volatile substances from the sealed environment by providing a selective escape path through the gas-permeable membrane. This removal of harmful factors preserves sensor accuracy over the entire shelf life period.
3Ease of manufacture
If conventional sealed packaging is used, then manufacturing simplicity is maintained, but frequent calibration is required due to sensor drift
Solution Approach 1:
The gas-permeable membrane is integrated directly into the packaging structure, adding minimal complexity to the manufacturing process. The membrane can be laminated or co-extruded with other packaging layers, maintaining ease of manufacture while eliminating the need for frequent calibration by preventing volatile accumulation.
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 gas-permeable packaging method reduces sensor drift and maintains accuracy by allowing volatile substances to escape, ensuring the glucose sensor remains stable and functional for a longer period without the need for frequent calibration.
Implementation Method 1
The sealing material allows volatile substances to vent from inside the sealed package tray to outside the sealed package tray
Implementation Method 2
maintaining sterility while preventing contaminants from entering
Data Source
AI summary
A product allows gaseous manufacturing by-products to be vented from the inside a sealed package tray. An exemplary method for packaging a device includes sealing the device inside a package tray with a gas-permeable sealing material, resulting in a sealed package tray. The sealing material allows volatile substances to vent from inside the sealed package tray to outside the sealed package tray.