Fluorescent Cleaning Composition for Real-Time Endoscope Cleanliness
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Solution Overview
Problem
Existing cleaning processes for reusable medical equipment, particularly endoscopes, are inadequate in detecting residual biological material, leading to ineffective manual cleaning and potential spread of infectious organisms due to undetected biofilm and contaminants.
Innovation Solution
A composition containing ortho-phthalaldehyde with a pH of 9.0 to 13.0, along with a glycol, surfactant, and buffer system, is used to clean medical devices, with real-time fluorescence monitoring to assess cleanliness by measuring fluorescence intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual cleaning inspection is performed by human technician, then cleaning process can be performed, but residual biological material cannot be detected accurately
Solution Approach 1:
The patent introduces an intermediary substance (fluorescent marker or detection reagent) that binds to residual biological material and emits detectable signals. This intermediary enables the detection of contaminants that are otherwise invisible to human inspection, resolving the contradiction between ease of manual inspection and precision of contamination detection.
Solution Approach 2:
The patent replaces the mechanical/visual inspection system (human technician observation) with an optical detection system (fluorescence measurement). This substitution maintains the simplicity of the cleaning process while dramatically improving detection capability, allowing quantitative measurement of residual biological material.
2Reliability
If multiple separate cleaning and inspection steps are used, then thorough cleaning can be achieved, but cleaning time and process complexity increase
Solution Approach 1:
The patent combines the cleaning verification step with the cleaning process itself by using fluorescence detection during or immediately after cleaning. This merging eliminates separate inspection steps, reducing overall cleaning time while maintaining thoroughness through real-time feedback on cleaning effectiveness.
Solution Approach 2:
The patent implements a feedback mechanism where fluorescence intensity measurements provide real-time information about cleaning effectiveness. This feedback allows dynamic adjustment of cleaning parameters and provides objective criteria for determining when cleaning is complete, ensuring thorough cleaning without unnecessary time consumption.
3Reliability
If high-level disinfection is performed before manual cleaning verification, then sterilization can be achieved, but ineffective cleaning cannot be identified
Solution Approach 1:
The patent performs preliminary detection of residual biological material after manual cleaning but before high-level disinfection. This preliminary action identifies whether manual cleaning was effective, providing information that determines whether subsequent disinfection steps are necessary and helping prevent the false assumption that sterilization has occurred when cleaning was inadequate.
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 composition provides simultaneous cleaning and detection, enabling rapid and sensitive protein detection at room temperature, improving the efficiency of endoscope reprocessing by ensuring complete cleaning and reducing residual biological material.
Implementation Method 1
shining an excitation light on the cleaning composition and measuring intensity of the fluorescence of the cleaning composition
Data Source
AI summary
This disclosure describes a composition which can provide real-time feedback during medical device cleaning or reprocessing. The composition can be used to monitor the amount of biological material cleaned from medical devices and to determine when cleaning is complete. The disclosure also relates to a method of cleaning, or assessing the cleanliness of, a medical device such as an endoscope. Cleanliness can be assessed by contacting the medical device with the composition, shining an excitation light on the composition, and measuring intensity of resulting fluorescence over time.