Biopharmaceutical Pouch Integrity Indicator
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Solution Overview
Problem
Existing methods for detecting the loss of integrity in closed, non-porous flexible plastic pouches, especially those containing biopharmaceutical products, are complex, bulky, and difficult to use, and cannot reliably detect integrity issues that occur after manufacturing and before the product is introduced, particularly when the pouches are stored or handled over extended periods.
Innovation Solution
A pouch with an incorporated active loss of integrity indicator, featuring a colorimetric detector that changes color in response to a tracer gas, allowing for easy visual assessment of pouch integrity without the need for specialized equipment or personnel, using a dual-casing design with spacer means to ensure accurate detection of any loss of integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure drop testing methods are used to detect pouch integrity, then detection capability is provided, but the devices are complex, bulky, and difficult to use
Solution Approach 1:
The invention extracts the detection function from complex external testing devices and incorporates it directly into the pouch structure itself through the indicator layer and tracer gas system, eliminating the need for bulky external equipment
Solution Approach 2:
The pouch becomes self-diagnostic through the incorporated indicator layer that automatically detects and signals integrity issues via color change, eliminating the need for external testing devices and personnel
2Reliability
If traditional integrity testing is performed, then detection is possible, but it cannot reliably detect issues occurring after manufacturing and before product introduction
Solution Approach 1:
The tracer gas is introduced into the pouch during manufacturing and the indicator layer is pre-positioned to detect leaks, creating a ready-to-use detection system that remains active throughout storage and handling periods
Solution Approach 2:
The system uses a small amount of tracer gas continuously present in the pouch to provide ongoing detection capability throughout the entire storage period, rather than performing discrete testing at specific intervals
3Ease of operation
If no integrity indicator is incorporated, then the pouch structure remains simple, but visual assessment of pouch integrity is not possible
Solution Approach 1:
The indicator layer contains a colorimetric material that changes color in response to tracer gas concentration, providing immediate visual feedback on pouch integrity without requiring complex instrumentation
Solution Approach 2:
The indicator layer serves multiple functions: it acts as a visual integrity indicator, a seal between the pouch and cap, and potentially a protective layer, consolidating multiple functions into a single component
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
Enables reliable, quick, and easy detection of pouch integrity before use, ensuring the biopharmaceutical product is stored in a sealed and sterile environment, reducing the risk of contamination and ensuring product quality without the need for complex devices or personnel.
Implementation Method 1
at least one colorimetric detector of at least one tracer gas that is responsive to the concentration of at least one tracer gas in the environment in which it is located, by switching from a first color to a second color that is different from the first color
Data Source
AI summary
A pouch includes: a first closed, inner casing, made of at least one non-porous plastic material with a high-capacity gas barrier, delimiting a first space, forming a pouch stricto sensu for accommodating a biopharmaceutical product or device, a second closed, outer casing, made of at least one non-porous plastic material with a high-capacity gas barrier, delimiting a second space in which the pouch stricto sensu is located, spacer elements, at least one selected tracer gas, located in the first or second space outside of the pouch stricto sensu, with a higher partial pressure than in the second space outside of the pouch stricto sensu or in the first space, at least one colorimetric detector located, respectively, in the second space outside of the pouch stricto sensu or in the first space responsive to the concentration of the tracer gas, by switching from a first color to a second different color.