Biological Indicator Gas Sensing for Rapid Sterility Verification
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Solution Overview
Problem
Existing sterilization processes in healthcare and industrial settings face inefficiencies due to the need for a 24 to 72-hour incubation period to determine sterility, which is impractical for facilities with limited resources and immediate reuse needs.
Innovation Solution
A process and device using a viability detection medium that produces a gaseous reaction product when exposed to viable test microorganisms, detected by a capacitive, electro-mechanical, or resistive sensor, allowing for rapid determination of sterilization efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional incubation methods are used to determine sterility, then measurement precision is improved, but loss of time increases significantly
Solution Approach 1:
The patent replaces the traditional biological incubation system with a sensor-based detection system. Instead of relying on metabolic growth over 24-72 hours, the invention uses capacitive, electro-mechanical, or resistive sensors to detect the presence or absence of microorganisms instantaneously, substituting a mechanical/biological process with an electronic detection system that provides immediate results.
Solution Approach 2:
The invention changes the detection parameter from metabolic activity requiring extended incubation to direct electrical or physical property detection. By measuring electrical capacitance, resistance, or mechanical properties of the biological indicator, the system achieves rapid sterility verification without the time-consuming incubation period, transforming the measurement approach from temporal to instantaneous.
2Loss of time
If rapid detection is implemented, then loss of time is reduced, but device complexity increases
Solution Approach 1:
The patent extracts the detection function from the complex biological incubation process and isolates it into a separate sensor module. The sensing device is designed as a distinct component that can be integrated into the biological indicator, separating the rapid detection capability from the traditional incubation system and enabling time-efficient operation without requiring complex overall system architecture.
Solution Approach 2:
The sensing device is designed to perform multiple functions: it can detect the presence of microorganisms, determine sterility status, and potentially monitor other parameters. By creating a multi-functional sensor that combines detection capabilities, the invention reduces device complexity while achieving rapid detection, as a single integrated sensor replaces what would otherwise require multiple separate systems.
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 instantaneous or near-instantaneous assessment of sterilization effectiveness, reducing the time required to confirm sterility to seconds or minutes, compared to traditional methods.
Implementation Method 1
the sensing device including a capacitive sensor
Implementation Method 2
the dielectric material configured to absorb or adsorb the gaseous reaction product, the presence of the gaseous reaction product changing the dielectric constant between the electrical conductors
Implementation Method 3
the dielectric material configured to absorb or adsorb the gaseous reaction product
Implementation Method 4
the dielectric material configured to absorb or adsorb the gaseous reaction product
Implementation Method 5
the viability detection medium causes viable test microorganisms of the biological indicator to metabolically respond and produce the gaseous reaction product
Data Source
AI summary
A process for determining the viability of a biological indicator includes exposing the biological indicator to a viability detection medium, the biological indicator including test microorganisms, the exposing the biological indicator to the viability detection medium producing a gaseous reaction product when one or more of the test microorganisms are viable. The presence or absence of the gaseous reaction product produced by the biological indicator combined with the viability detection medium is detected with a sensing device, the sensing device comprising a capacitive sensor, an electro-mechanical sensor, or a resistive sensor, wherein the presence of the gaseous reaction product indicates the presence of viable test microorganisms and the absence of the gaseous reaction product indicates the absence of viable test microorganisms. A sterilization detection device includes a container configured to contain the biological indicator, a viability detection medium, and the sensing device.