Flexible Bag Fixation System Vacuum Dosing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for fixing and storing biospecimens are inefficient, leading to exposure to toxic formalin fumes, improper fixation ratios, damage to tissue morphology, and logistical challenges due to bulky containers and ventilation requirements.
Innovation Solution
A method and system for automatically dosing a fixative solution in flexible bags, where the fixative amount is calculated based on the specimen weight, allowing for vacuum sealing and storage, reducing the need for excessive fixative and minimizing exposure to toxic fumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If prefilled containers with formalin are used, then fixation is simplified, but toxic fumes are released and exposure to harmful substances increases
Solution Approach 1:
The system divides the fixation process into separate stages: initial placement in a container, followed by vacuum evacuation of harmful fumes, and then filling with fixative solution. This segmentation allows the container to be opened in a controlled environment where fumes are removed before the fixative is added, reducing exposure to harmful substances while maintaining ease of use.
Solution Approach 2:
A vacuum system acts as an intermediary between the container opening and the fixative filling process. The vacuum evacuation creates a controlled environment that removes toxic fumes before the fixative solution is introduced, serving as a protective mediator that prevents harmful substance exposure while enabling the fixation process to proceed.
2Ease of operation
If containers are opened for specimen placement, then specimen access is improved, but formalin evaporation occurs and toxic fumes are released
Solution Approach 1:
The system performs vacuum evacuation of the container before filling it with fixative solution. This preliminary action removes air and volatile substances from the container headspace, creating a vacuum state that prevents formalin evaporation during subsequent handling and storage, while still allowing easy access to specimens when needed.
Solution Approach 2:
The vacuum environment created in the container acts as an inert atmosphere that prevents formalin evaporation. By removing oxygen and other gases that facilitate evaporation, the vacuum state preserves the fixative solution and prevents the release of toxic fumes while maintaining specimen accessibility.
3Ease of manufacture
If standard containers are used, then storage is simplified, but they are heavy, bulky, and require ventilation
Solution Approach 1:
The system employs a flexible container with a vacuum seal that can be collapsed or minimized in volume. This flexible design allows the container to be lightweight and compact while maintaining an airtight seal that prevents formalin evaporation, eliminating the need for heavy rigid containers and ventilation systems during storage.
Solution Approach 2:
The vacuum environment within the container eliminates the need for external ventilation systems. The vacuum seal creates a self-contained environment that prevents formalin evaporation, allowing the container to be lightweight and compact without requiring additional ventilation infrastructure, thereby reducing overall weight and storage complexity.
4Reliability
If excessive fixative is used, then fixation is ensured, but storage volume and weight increase
Solution Approach 1:
The system replaces traditional mechanical mixing and manual handling methods with an automated vacuum filling system. The vacuum environment allows precise control over the amount of fixative solution added, ensuring adequate fixation while minimizing excess fixative that would increase storage volume and weight.
Solution Approach 2:
The system changes the physical state of the container environment from atmospheric pressure to vacuum. This parameter change allows precise control over the volume of fixative solution added, as the vacuum state prevents overfilling and evaporation, ensuring the optimal amount of fixative is used for reliable fixation without excessive volume.
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 approach standardizes the fixative/specimen ratio, reduces storage volume and weight, minimizes fixative usage, prevents evaporation, and ensures safe handling and storage by eliminating the need for ventilation, thereby improving the quality and safety of biospecimen preservation.
Implementation Method 1
The invention relates to a method and a system for automatically dosing a fixative solution in a flexible bag containing at least one biological organic sample... sealing a biospecimen preferably under vacuum
Data Source
AI summary
A method for automatically dosing a fixative solution in a flexible bag containing at least one biological organic sample comprises placing the bag with the sample in a dosing system (e.g., on a holder or weighing device), computing a required volume or weight of fixative solution as a function of the sample or the bag with the sample, and automatically transferring the computed volume or weight of fixative solution from a storage container into the bag. A system is also described for automatically dosing a fixative solution in a flexible bag containing at least one biological organic sample, a carrier for said flexible bags, and a storage cabinet for storing the carrier.