Biopharmaceutical Container Freeze Monitoring via Headspace Pressure
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Solution Overview
Problem
Current methods for monitoring the freezing state of biopharmaceutical fluids in containers are invasive, costly, and provide limited information, as they rely on localized temperature sensors that fail to detect changes in the fluid's state once it solidifies or during thawing, and are not suitable for large containers.
Innovation Solution
A system that uses a sensor to detect macroscopic parameters such as gas pressure in the container's headspace to monitor the freezing state of biopharmaceutical fluids, allowing for non-invasive and cost-effective monitoring of the fluid's transition between liquid and solid states, applicable to both small and large containers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If localized temperature sensors are placed inside the container to monitor freezing state, then information about the freezing process can be obtained, but the sensor placement becomes intrusive and requires fluidtight and sterile attachment through the container wall
Solution Approach 1:
The patent uses the container wall itself as an intermediary medium to transmit freezing information from the fluid to external sensors. The flexible container wall deforms in response to freezing/thawing processes, and this deformation is detected externally by sensors, eliminating the need for intrusive internal sensors while maintaining sterile conditions.
Solution Approach 2:
The patent replaces direct thermal measurement (mechanical/physical contact) with indirect mechanical deformation measurement. Instead of placing temperature sensors in direct contact with the fluid, the system measures the mechanical deformation of the container wall that results from freezing/thawing, providing non-intrusive monitoring.
2Loss of information
If multiple sensors are increased to monitor the entire fluid volume, then comprehensive freezing information can be obtained, but the cost and complexity of the system increase proportionately with container volume
Solution Approach 1:
The patent makes the container wall multi-functional by using it both as the containment structure and as the sensing element. The same flexible wall that contains the fluid also serves as the indicator of freezing state through its deformation, eliminating the need for multiple separate sensors throughout the container volume.
Solution Approach 2:
The patent merges the container structure with the sensing function. The flexible container wall and the monitoring system are combined into a unified approach where the wall's natural deformation during freezing/thawing provides the monitoring signal, eliminating the need for separate sensor components inside the container.
3Measurement precision
If localized sensors are used to monitor freezing state, then the freezing process can be tracked at sensor location, but natural convection movements and locational inconsistencies in thermal treatment remain undetected
Solution Approach 1:
The patent segments the monitoring approach by using multiple measurement points on the container wall to capture different aspects of the freezing process. By monitoring deformation at various locations on the flexible wall, the system can detect non-uniform freezing, convection movements, and thermal treatment inconsistencies across the entire fluid volume.
4Loss of information
If intrusive sensors are placed inside the container to monitor freezing state, then information from inside the container can be obtained, but the materials and attachment methods must not affect or contaminate the biopharmaceutical fluid
Solution Approach 1:
The patent uses the container wall as an intermediary that transmits freezing information without requiring direct contact between sensors and the biopharmaceutical fluid. This eliminates the need for complex sterile attachment procedures and biocompatible sensor materials, as all sensing occurs externally through the wall's deformation.
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
This system provides comprehensive and cost-effective monitoring of the freezing and thawing processes by detecting abrupt changes in macroscopic parameters, ensuring accurate determination of the fluid's state without the need for multiple sensors, thus overcoming the limitations of existing technologies.
Implementation Method 1
A system that uses a sensor to detect macroscopic parameters such as gas pressure in the container's headspace to monitor the freezing state of biopharmaceutical fluids
Implementation Method 2
a biopharmaceutical fluid that is to transition between the liquid state and the frozen state
Implementation Method 3
it has also been proposed to keep it in frozen form. Thermal treatment systems (heat and/or cold) have been provided for this purpose, in particular for freezing the biopharmaceutical fluid
Data Source
AI summary
A device for monitoring the freezing state of a biopharmaceutical fluid in a container intended to receive a biopharmaceutical fluid that must pass between the liquid state and the frozen state, includes a peripheral envelope (25) made of plastic, to be connected to a heat treatment receptacle (5), a sensor (19) suitable for detecting a control parameter which is a macroscopic parameter of the container, and an analysis system (62) suitable for determining a freezing state of the biopharmaceutical fluid on the basis of the macroscopic parameter of the container.