Gentamicin-Propionate Microbicide for Enzyme Sensor Compatibility
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Solution Overview
Problem
Current microbicidal compositions are incompatible with enzyme-based sensors, leading to adverse effects on their biological activity and stability, which is a critical issue in clinical laboratory instruments where quick and accurate results are necessary for diagnosis and treatment.
Innovation Solution
A microbicidal composition combining gentamicin and propionate, specifically calcium or sodium propionate, which exhibits synergistic effects to inhibit microbial growth without affecting enzyme-based biosensors, maintaining their stability and activity over an extended period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional microbicidal compositions are used in reagents, then microbial contamination is prevented, but enzyme-based sensors are adversely affected and lose biological activity
Solution Approach 1:
The patent changes the chemical parameters of the microbicidal composition by using a combination of gentamicin (an aminoglycoside antibiotic) and propionate (a short-chain carboxylate salt) at specifically optimized concentrations. This parameter change allows the composition to maintain microbicidal efficacy while being compatible with enzyme-based sensors, resolving the contradiction between contamination prevention and sensor compatibility
Solution Approach 2:
The patent employs a composite microbicidal system combining two different agents with distinct mechanisms of action: gentamicin which targets bacterial protein synthesis, and propionate which disrupts microbial membrane function. This composite approach provides broad-spectrum microbicidal activity while maintaining compatibility with enzyme-based sensors, overcoming the limitations of single-agent systems
2Duration of action of stationary object
If reagents are stored for extended periods to be commercially practical, then shelf life is improved, but microbial growth occurs compromising reagent stability
Solution Approach 1:
The patent applies preliminary action by incorporating the microbicidal composition of gentamicin and propionate into the reagent formulation before storage. This pre-established protective system prevents microbial growth throughout the extended storage period, enabling the reagent to maintain stability and reliability for commercially practical shelf lives of months or years
3Reliability
If microbicidal compositions are added to reagents for critical care instruments, then contamination during manufacturing and use is prevented, but the compositions are incompatible with enzyme-based sensors
Solution Approach 1:
The patent resolves the compatibility issue by optimizing the concentration parameters of gentamicin and propionate in the microbicidal composition. At these specifically adjusted concentrations, the composition prevents contamination in critical care instruments while being compatible with enzyme-based sensors, thereby achieving both contamination prevention and sensor compatibility
Solution Approach 2:
The gentamicin-propionate composition acts as an intermediary solution that bridges the need for contamination prevention and the requirement for sensor compatibility. This intermediate composition provides microbicidal protection without the harsh effects of traditional microbicides, enabling the use of enzyme-based sensors in critical care reagents
Data Source
Figure 1~2
AI summary
Microbicidal compositions that exhibit enhanced microbial efficacy are disclosed, as well as methods of producing and using the microbicidal compositions.