Cleaning Indicator Gap Structure for Medical Instrument Soil Removal
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Solution Overview
Problem
Current cleaning systems for medical instruments lack a reliable method to ensure adequate removal of inorganic and organic soils, which can impede sterilization and lead to infections or pyrogenic reactions, particularly in complex or hard-to-reach areas like flexible endoscopes and modular instruments.
Innovation Solution
A cleaning indicator comprising two parallel substrates with a controlled gap and spacers, where soil is deposited between them, allowing for monitoring of soil removal through detection technologies such as ion-selective electrodes or spectrophotometry, ensuring adequate cleaning before sterilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cleaning methods are used for medical instruments, then the cleaning process is simple, but the cleaning effectiveness cannot be reliably monitored
Solution Approach 1:
The patent introduces a cleaning indicator as an intermediary device that mediates between the cleaning process and the monitoring system. This indicator comprises two substrates with soil disposed between them, creating a controlled gap that allows detection of soil removal without requiring direct monitoring of the actual medical instrument. The intermediary translates the cleaning effectiveness into a measurable signal.
Solution Approach 2:
The cleaning indicator creates a simplified copy or model of the cleaning situation by placing soil between two substrates in a controlled gap. This copy replicates the essential feature of soil removal that needs to be monitored, allowing the detection system to measure cleaning effectiveness without dealing with the complexity of the actual medical instrument geometry.
2Reliability
If complex cleaning apparatus are used to ensure adequate cleaning, then cleaning effectiveness improves, but the device complexity and cost increase
Solution Approach 1:
The patent extracts the monitoring function from the complex cleaning apparatus by introducing a separate, simple cleaning indicator. The indicator comprises basic elements (two substrates, spacers, and soil) that can be independently monitored. This separation allows the cleaning process to remain relatively simple while the monitoring function is independently implemented through detection technologies.
Solution Approach 2:
The patent replaces complex mechanical monitoring of cleaning effectiveness with detection technologies such as ion-selective electrodes or spectrophotometry. Instead of using complex mechanical sensors to measure soil removal, the system uses chemical or optical detection methods that are simpler and more reliable for measuring the presence or absence of soil.
3Measurement precision
If visual inspection is used to monitor cleaning, then the method is simple, but the measurement precision is insufficient
Solution Approach 1:
The patent utilizes color changes or optical property changes as indicators of soil removal. The cleaning indicator is designed so that the presence or absence of soil between the substrates can be detected through optical means, such as changes in light transmission or reflection. This allows precise measurement of cleaning effectiveness through optical detection rather than simple visual inspection.
Solution Approach 2:
The patent replaces manual visual inspection with automated detection technologies such as ion-selective electrodes for detecting inorganic soil or spectrophotometry for organic soil. These detection methods provide quantitative, precise measurements of soil removal, eliminating the subjectivity and imprecision of visual inspection while maintaining relative simplicity through the use of standard analytical techniques.
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
This solution enables effective monitoring of cleaning processes, ensuring that medical devices are sufficiently cleaned to achieve a sterility assurance level of 10^-6, reducing the risk of infections and ensuring efficient sterilization by correlating soil release rates with cleaning times and conditions.
Implementation Method 1
the soil detector utilizes detection technology capable of detecting inorganic and/or organic soil
Implementation Method 2
the soil detector utilizes detection technology capable of detecting inorganic and/or organic soil
Data Source
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AI summary
A soil standard for monitoring a cleaning process for a medical instrument, includes two substantially parallel substrates separated with two substantially equal thickness spacers, wherein a gap is formed between the two substrates with soil in the gap. The substrates and spacers can be formed as integral pieces and snapped together.