Oxidation-Responsive Polymer Indicator for Sterilization Degree Measurement
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Solution Overview
Problem
Current medical device sterilization processes lack a reliable method to determine the degree of oxidative treatment, particularly in ensuring the complete removal of bioburden, which is crucial for preventing cross-contamination and ensuring device readiness for reuse.
Innovation Solution
A system and method utilizing an oxidation-responsive polymer indicator that discolors based on exposure to oxidative chemicals, allowing for measurement of discoloration against a threshold color value to determine the degree of oxidative treatment, comprising a polymer with amine, methylene, or methine groups that form quinones upon oxidation, and a color value device to assess this discoloration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an oxidative treatment is applied to sterilize a medical device, then the sterilization effectiveness is improved, but the ability to measure the degree of treatment is insufficient
Solution Approach 1:
The patent employs a polymer indicator containing amine, methylene, or methine groups that undergo oxidation-induced color changes when exposed to oxidative chemicals during sterilization treatment. The colorimetric transformation provides a visual and measurable indicator of the treatment degree, directly resolving the measurement precision deficiency while maintaining sterilization effectiveness.
Solution Approach 2:
The polymer indicator acts as an intermediary substance between the oxidative treatment and the measurement system. It chemically interacts with the oxidative chemicals through oxidation reactions, transforming the invisible chemical process into a visible color change that can be quantified, thereby enabling precise measurement of the treatment degree.
2Measurement precision
If a polymer indicator with oxidation-responsive groups is used, then the measurement capability is improved, but the device complexity increases
Solution Approach 1:
The patent applies the indicator polymer locally to the medical device surface rather than requiring a complete system overhaul. The polymer contains specific oxidation-responsive functional groups (amine, methylene, or methine) that are strategically positioned to interact with oxidative chemicals, providing localized measurement capability without complicating the overall device structure.
Solution Approach 2:
The indicator polymer is designed as a disposable or single-use component that can be applied, used, and discarded after one sterilization cycle. This approach avoids the need for complex reusable measurement systems with calibration and maintenance requirements, reducing overall device complexity while maintaining measurement precision.
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
Enables precise determination of the oxidative treatment's effectiveness, ensuring the medical device is adequately sterilized by correlating the indicator's discoloration with the exposure concentration and time of oxidative chemicals, thereby ensuring the device's sterility and readiness for reuse.
Implementation Method 1
an indicator comprising a polymer, said indicator being suitable to discoloration based on an oxidation of the polymer by a process condition of the oxidative treatment oxidizing the polymer
Data Source
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AI summary
An indicator and method of use thereof, and indicator system and method of use thereof are provided to determine the degree of an oxidative treatment. An indicator is incorporated into the oxidative treatment. The object and the indicator are subjected to the oxidative treatment. A discoloration of the indicator occurs based on an oxidation of the polymer by a process condition of the oxidative treatment oxidizing the polymer. The discoloration of the indicator is measured against a threshold color value to determine the degree of the oxidative treatment.