Packaging System for Medical Catheters Against VHP Degradation
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Solution Overview
Problem
Polymer medical devices, such as catheters, degrade when exposed to whole-room disinfecting vapors like Vaporized Hydrogen Peroxide (VHP), leading to brittleness and potential fractures during procedures, increasing the risk of complications and healthcare costs.
Innovation Solution
A packaging system incorporating a diffusion inhibitor member made from non-porous materials, such as polyethylene or polypropylene, that covers the catheter tip and a portion of the shaft, preventing the penetration of disinfecting vapors while allowing sterilizing gases like ethylene oxide to reach the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymer medical devices are exposed to whole-room disinfecting vapors like VHP for sterilization, then the disinfection effect is achieved, but the polymer material degrades leading to brittleness and potential fractures
Solution Approach 1:
The packaging system divides the protection function into segments: an outer porous package layer for sterilant permeation and an inner non-porous diffusion inhibitor layer for VHP blocking. This segmentation allows different parts of the packaging to perform different functions - the outer layer enables sterilization while the inner layer protects the device from degradation
Solution Approach 2:
The diffusion inhibitor member acts as an intermediary barrier between the harmful VHP environment and the polymer device. It selectively blocks VHP molecules while allowing sterilizing gases to pass through, mediating the interaction between the external disinfection environment and the internal device
2Strength
If a non-porous packaging material is used to block VHP penetration, then polymer degradation is prevented, but sterilizing gases cannot reach the device
Solution Approach 1:
The packaging system applies different material qualities to different layers: the outer layer has porous properties optimized for sterilant permeation, while the inner layer has non-porous properties optimized for VHP blocking. Each layer's local quality is tailored to its specific function in the sterilization and protection process
3Ease of operation
If the catheter tip is fully exposed during storage, then access is easy, but degradation from VHP exposure occurs
Solution Approach 1:
The diffusion inhibitor member is nested within the outer package layer, creating a protective inner chamber that houses the catheter tip. This nested structure allows the tip to be protected during storage while remaining accessible when needed, as the inner layer can be removed or opened without compromising the outer packaging
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 packaging system effectively prevents polymer degradation by limiting exposure to VHP, maintaining the tensile strength of catheter tips and ensuring the medical device remains functional and safe for use.
Implementation Method 1
A packaging system incorporating a diffusion inhibitor member made from non-porous materials, such as polyethylene or polypropylene, that covers the catheter tip and a portion of the shaft, preventing the penetration of disinfecting vapors
Implementation Method 2
allowing sterilizing gases like ethylene oxide to reach the device
Data Source
AI summary
A packaging system and method for reducing or eliminating exposure of medical devices to whole-room disinfecting gases and vapors are disclosed. In some embodiments, the packaging system and method may comprise a diffusion inhibitor member configured as an open-ended bag. In some embodiments, the diffusion inhibitor member comprises polyethylene or polypropylene.