Sterilization Cabinet Filter Verification Without Sterile Field Setup
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Solution Overview
Problem
Current sterilization verification methods require two individuals, one of whom must be sterile, to inspect the filter of a sterilization cabinet, necessitating the removal of contents and preparation of a sterile field, which is inefficient and disruptive.
Innovation Solution
A method allowing a single user, ungowned and non-sterile, to inspect the filter integrity of a sterilization cabinet before removing contents, eliminating the need for a sterile field and additional personnel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two individuals are used to inspect the filter (one sterile, one non-sterile), then the sterilization verification is performed according to traditional guidelines, but the process becomes inefficient and disruptive requiring removal of contents and preparation of sterile field
Solution Approach 1:
The patent extracts the filter inspection function from the sterile field requirement. The filter is made accessible through a dedicated access port that allows inspection without compromising the sterile environment inside the sterilization chamber. This separation allows non-sterile personnel to inspect the filter while sterile contents remain undisturbed.
Solution Approach 2:
The sterilization chamber is segmented into distinct access points: a sterile access port for filter inspection and a separate sterile field for content removal. This segmentation allows different operations (filter inspection and content handling) to occur independently with appropriate sterility requirements for each.
2Reliability
If the filter is inspected by a sterile individual, then sterility is maintained, but the process requires removal of contents and preparation of sterile field which is time-consuming
Solution Approach 1:
The filter inspection function is extracted from the sterile field requirements. The access port design allows the filter to be visually inspected through a window or by removing only the filter component itself, while the sterile contents remain in place and the sterile field is not compromised. This eliminates the time required to prepare and maintain a sterile field for inspection purposes.
Solution Approach 2:
The patent employs visual inspection methods where the filter condition can be assessed through a transparent window or by examining a copy/image of the filter state without physically handling it. This allows sterility to be maintained while still obtaining the necessary verification information.
3Ease of operation
If contents are removed to access the filter, then the filter can be inspected, but the sterile field must be prepared and contents are exposed to contamination risk
Solution Approach 1:
The filter is extracted as a separate, independently accessible component through a dedicated access port. This allows the filter to be inspected or replaced without removing the sterile contents from the chamber, eliminating the contamination risk associated with exposing contents to the non-sterile environment during filter access.
Solution Approach 2:
The access port serves as an intermediary mechanism between the non-sterile external environment and the sterile internal environment. It provides a controlled interface that allows filter inspection while maintaining the sterility barrier, preventing direct exposure of contents to potential contaminants.
4Measurement precision
If traditional sterilization verification procedures are followed, then comprehensive inspection is possible, but additional personnel and equipment are required increasing complexity
Solution Approach 1:
The filter inspection function is extracted and simplified through the access port design. The filter can be visually inspected through a window or by simple removal of the filter component itself, eliminating the need for complex inspection equipment or multiple personnel. The extraction of this function to a dedicated access point maintains inspection accuracy while reducing system complexity.
Data Source
AI summary
A method of verifying sterilization comprises performing a sterilization cycle on a sterilizing cabinet, opening the door with the first filter overlying the vent port by a single user being non-sterile and ungowned and examining the first filter, by the single user being non-sterile and ungowned, to verify the integrity of the sterilization cycle in the sterilizing device, determining if the integrity of the first filter is acceptable by the single user being non-sterile and ungowned, and removing, by the single user being sterile and gowned, through the access port at least one tray from the interior of the sterilizing cabinet if the integrity of the first filter is acceptable.