Sterile Liquid Transfer Port Segmentation and Steam Sterilization
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Solution Overview
Problem
The transfer of sterile liquids from a relatively dirty environment to a clean environment is compromised by contamination from biological agents and nonviable particles, which can lead to the loss of sterility and contamination of the clean environment.
Innovation Solution
The sterile liquid transfer port (SLTP) system employs an alpha assembly and a beta assembly, along with a sterilization docking cover, to sterilize the product tank and conduits using steam cleaning and maintain isolation between the dirty and clean environments, ensuring uncontaminated transfer through an isolation wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the product tank and conduits are exposed to the dirty environment for filling operations, then productivity is improved, but contamination from biological agents and nonviable particles compromises sterility
Solution Approach 1:
The system is divided into two separate environments: a dirty environment (product suite) for storing bulk liquid and a clean environment (filling suite) for filling operations. The alpha assembly and beta assembly act as physical barriers that segment these environments, allowing sterilization of conduits in the dirty environment while maintaining sterility in the clean environment during filling operations.
Solution Approach 2:
The alpha assembly and beta assembly serve as intermediary barriers between the dirty and clean environments. These assemblies include seals and isolation mechanisms that prevent contamination from passing through the transfer port, enabling safe transfer of sterile liquid from the dirty environment to the clean environment.
2Reliability
If steam sterilization is performed on the product tank and conduits, then sterility is improved, but the complexity of the sterilization process increases
Solution Approach 1:
The beta assembly is designed to perform multiple functions: it serves as a connection interface between the product tank and transfer conduit, acts as a seal barrier, and functions as a sterilization chamber. The docking cover integrates with the beta assembly to create a sealed environment for steam sterilization, eliminating the need for separate sterilization equipment and simplifying the overall process.
3Object-affected harmful factors
If an isolation wall with transfer port is used to separate dirty and clean environments, then contamination prevention is improved, but the ease of operation for liquid transfer is reduced
Solution Approach 1:
The alpha assembly incorporates a movable door mechanism that can open and close dynamically. During filling operations, the door opens to allow connection of filling hoses. During sterilization, the door closes to seal the dirty environment. This dynamic operation simplifies the transfer process while maintaining isolation effectiveness.
Solution Approach 2:
The system includes self-checking mechanisms such as interlocks that automatically verify the sealed status of the alpha and beta assemblies before allowing operation. The docking cover and bayonet connectors provide self-aligning and self-sealing features that simplify operator tasks while ensuring proper isolation and sterility maintenance.
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 SLTP effectively sterilizes the transfer system, preventing contamination and ensuring the sterility of the liquid during transfer, thereby maintaining the cleanliness of the receiving environment and facilitating safe, fast, and cost-effective distribution of sterile products.
Implementation Method 1
The sterile liquid transfer port rids the contamination by steam cleaning the product tank and associated conduits by use of a beta assembly and a sterilization docking cover
Data Source
AI summary
A sterilization system for a sterile liquid transfer port system includes an isolation wall having a first and second side, an alpha assembly spanning a port in the isolation wall between the first and second sides of the isolation wall and a beta assembly configured for connection with the alpha assembly from the first side of the isolation wall for sterile transfer of a product. The system further includes a docking cover on the first side of the isolation wall which can mate to the beta assembly during a sterilization process.