Foley Catheter Sampling Port Cap for Sterile Specimen Access
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Solution Overview
Problem
Medical devices, such as Foley catheters, become non-sterile after use due to bacterial contamination, leading to potential infections in patients, particularly through specimen sampling ports.
Innovation Solution
Incorporation of a disinfectant cap with a bacteria-killing fluid, such as 70% isopropyl alcohol, that can be selectively attached to and detached from the specimen sampling port to maintain sterility and prevent bacterial migration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the specimen sampling port remains open for sampling, then accessibility and ease of operation are improved, but bacterial contamination and infection risk increase
Solution Approach 1:
A disinfectant cap is introduced as an intermediary component between the specimen sampling port and the external environment. The cap contains a disinfectant reservoir that releases antimicrobial agents to create a protective barrier, allowing the port to remain accessible while preventing bacterial contamination during the sampling process.
Solution Approach 2:
The disinfectant cap is pre-loaded with antimicrobial agents before use. When attached to the specimen sampling port, it proactively establishes a sterile barrier in advance of potential contamination events, rather than reacting to contamination after it occurs.
2Reliability
If the Foley catheter system is kept sterile, then infection risk is reduced, but the system becomes complex requiring additional components
Solution Approach 1:
The disinfectant cap merges multiple functions into a single component: it serves as both a protective barrier and a disinfectant delivery system. The cap integrates the reservoir, dispensing mechanism, and protective cover into one unified device that attaches to the specimen sampling port.
Solution Approach 2:
The disinfectant cap is designed to be universally applicable to various Foley catheter systems with specimen sampling ports. It provides multiple functions including contamination prevention, active disinfection, and physical protection, making it a versatile addition to different catheter configurations.
3Reliability
If disinfectant is continuously applied to the specimen sampling port, then sterility is maintained, but the device complexity and cost increase
Solution Approach 1:
The disinfectant cap employs periodic action through controlled release mechanisms that dispense antimicrobial agents at predetermined intervals or under specific conditions (such as when the cap is attached or removed). This maintains sterility over extended periods without requiring continuous active disinfection, reducing system complexity.
Solution Approach 2:
The disinfectant cap is designed as a disposable component that is replaced periodically rather than maintained indefinitely. This approach maintains high sterility reliability through fresh disinfectant supply while avoiding the complexity of reusable systems that require cleaning, sterilization, and monitoring protocols.
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 disinfectant cap effectively prevents bacterial contamination of the specimen sampling port, reducing the risk of catheter-associated urinary tract infections by maintaining sterility for up to seven days and ensuring clean access to the Foley catheter system.
Implementation Method 1
a bacteria-killing fluid, such as 70% isopropyl alcohol, that can be selectively attached to and detached from the specimen sampling port
Data Source
AI summary
A medical procedure kit includes a Foley catheter having a specimen sampling port coupled thereto. A disinfectant cap is selectively attachable to, and detachable from, the specimen sampling port of the Foley catheter.