Sterilization Cartridge Position Detection to Prevent Operator Error
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Solution Overview
Problem
Current sterilization systems face challenges in effectively sterilizing medical devices with long, narrow lumens due to insufficient reach of sterilant vapor, leading to incomplete disinfection rather than sterilization, and require lengthy processing times, which can result in operator errors and re-contamination risks.
Innovation Solution
A sterilization system with a modular design that includes a vaporizer and condenser to increase sterilant concentration, a touch screen interface for user input, and a cartridge processing assembly that ensures proper sterilant extraction and application, along with a biological indicator for verifying sterilization efficacy, to ensure thorough sterilization of medical devices within a controlled sterilization chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sterilization systems use vaporized chemical sterilants or chemical gas to sterilize medical devices, then sterilization can be achieved, but the processing time becomes relatively long (e.g., longer than 24 hours for ethylene oxide)
Solution Approach 1:
The system changes the physical and chemical parameters of the sterilization process by using hydrogen peroxide vapor instead of ethylene oxide gas, operating at lower temperatures and shorter exposure times while achieving equivalent or superior sterilization efficacy. The vaporizer generates concentrated hydrogen peroxide vapor that penetrates devices more rapidly
Solution Approach 2:
The system utilizes phase transitions of hydrogen peroxide between liquid, vapor, and plasma states to achieve sterilization. The vaporizer converts liquid hydrogen peroxide to vapor, and the plasma generator creates low-frequency plasma that enhances penetration into diffusion-restricted spaces while reducing processing time
2Reliability
If sterilization systems use vaporized chemical sterilants, then sterilization can be achieved, but sterilization of lumens longer than a certain value is difficult due to insufficient reach of sterilant vapor
Solution Approach 1:
The system dynamically adjusts the sterilization process by alternating between vapor phase and plasma phase treatments. The low-frequency plasma generates ionized species that actively penetrate deep into long lumens through electrostatic forces and enhanced diffusion, overcoming the limitations of passive vapor diffusion
Solution Approach 2:
The system uses a composite approach combining hydrogen peroxide vapor and low-frequency plasma. The vapor provides initial sterilization while the plasma enhances penetration into diffusion-restricted spaces, creating a synergistic effect that effectively sterilizes long and narrow lumens
3Reliability
If sterilization cycles are performed to ensure complete sterilization, then contaminating organisms are killed, but operator errors may still result in improperly positioned removable components being returned to service
Solution Approach 1:
The system incorporates feedback mechanisms including position sensors that detect the location of removable components during the sterilization cycle. The control system receives sensor data and provides real-time feedback to verify proper positioning, alerting operators to errors and preventing contaminated devices from being returned to service
Solution Approach 2:
The system replaces manual visual inspection with automated sensor-based detection. Optical sensors and position detection systems automatically verify the presence and correct positioning of removable components, eliminating reliance on operator judgment and reducing errors
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 system achieves effective sterilization of medical devices by ensuring sufficient sterilant concentration and distribution, reducing processing time, and providing a verification mechanism to confirm sterilization efficacy, thereby minimizing re-contamination risks and operator errors.
Implementation Method 1
a vaporizer and condenser to increase sterilant concentration
Implementation Method 2
a vaporizer and condenser to increase sterilant concentration
Implementation Method 3
Some such systems provide a hydrogen peroxide/gas plasma sterilization system comprising a vacuum chamber and plasma source
Implementation Method 4
Some such systems provide a hydrogen peroxide/gas plasma sterilization system comprising a vacuum chamber and plasma source
Implementation Method 5
Each of these methods may depend to a certain extent on the diffusion rates of the sterilization fluids (e.g., gases) upon or into the medical devices to be sterilized
Data Source
AI summary
A sterilization system includes a sterilization chamber, a processor, and a sterilization module. The sterilization module includes a frame assembly, an extraction assembly, and a carriage assembly. The extraction assembly is configured to extract a sterilant fluid from a cartridge and transfer the sterilant fluid to the sterilization chamber. The carriage assembly includes a motor, a carriage body, and a translating flag. The carriage body is configured to receive the cartridge. The translating flag is configured to move from a first position to a second position relative to the carriage body in response to the carriage body receiving the cartridge. The sensor is configured to detect movement of the translating flag from the first position to the second position.