Frangible-Seal Wipe Pouch for Sterile Hazardous Drug Deactivation
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Solution Overview
Problem
Conventional clean room sterilization methods fail to adequately deactivate hazardous drugs on surfaces, spreading them instead, and chemicals capable of deactivation cannot be irradiated, complicating clean room introduction.
Innovation Solution
A wipe kit with multiple compartments separated by frangible seals, allowing for aseptic filling and irradiation sterilization of certain components, ensuring effective deactivation, decontamination, and disinfection of hazardous drugs in clean rooms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sterilization methods are used in clean rooms, then sterilization is achieved, but hazardous drugs are not adequately deactivated and are merely spread around
Solution Approach 1:
The pouch is divided into multiple separate compartments (first compartment for dry wipe, second compartment for liquid composition, third compartment for additional wipe or composition) separated by frangible seals. This segmentation allows each compartment to be optimized for its specific function while maintaining sterile barriers, enabling the liquid composition to adequately contact and deactivate hazardous drugs without merely spreading them.
Solution Approach 2:
The invention changes the state of the wipe from dry to saturated by breaking the frangible seal and allowing liquid composition to transfer into the first compartment. This parameter change (from dry to wet) transforms the wipe's capability from insufficient deactivation to effective hazardous drug deactivation, resolving the contradiction between sterilization and deactivation effectiveness.
2Object-affected harmful factors
If chemicals capable of deactivating hazardous drugs are introduced into the clean room, then deactivation is achieved, but the chemicals cannot be irradiated for sterilization
Solution Approach 1:
The pouch separates irradiatable components (pouch structure, dry wipes, frangible seals) from non-irradiatable components (liquid chemical composition) into different compartments. This allows the pouch to be sterilized by irradiation before use, while the liquid composition is introduced aseptically through the frangible seal mechanism, resolving the contradiction between deactivation capability and sterilization feasibility.
Solution Approach 2:
The pouch structure, dry wipes, and sealing mechanisms are pre-sterilized by irradiation before the liquid composition is added. The frangible seal is pre-formed to enable aseptic opening. This preliminary sterilization action allows the non-irradiatable liquid composition to be introduced without compromising overall sterility, solving the manufacturing contradiction.
3Device complexity
If a single compartment pouch is used, then device complexity is reduced, but the ability to maintain sterility while adding liquid composition is compromised
Solution Approach 1:
The pouch is segmented into multiple compartments with frangible seals between them. This segmentation maintains sterile barriers while allowing controlled addition of liquid composition through the breakable seal mechanism. The complexity increase is minimal and justified by the significant improvement in sterile barrier integrity and composability.
Solution Approach 2:
The first compartment (dry wipe) is nested within the pouch structure, with the second compartment (liquid composition) adjacent to it, separated by the frangible seal. This nested arrangement allows the liquid to be added to the first compartment through the breakable seal without requiring complex external filling mechanisms, balancing simplicity with sterile integrity.
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 wipe kit efficiently deactivates, decontaminates, and disinfects hazardous drugs, maintaining compliance with USP standards and ensuring a safe clean room environment.
Implementation Method 1
the frangible seal is configured to break upon application of force
Implementation Method 2
a one-way filling valve is provided at the first compartment
Data Source
AI summary
A wipe pouch has a first compartment containing a first chemical, a second compartment containing a second chemical, and a third compartment containing a dry wipe. In certain embodiments, a first and second frangible seals separate the compartments. When ready for use, the first frangible seal is broken to mix bleach in the first compartment with WFI in the second compartment. The user then breaks the second frangible seal to saturate the wipe in the third compartment with the bleach/WFI mixture from the first and second compartments.