Catheter Lumen Antimicrobial Insert for Replenished Infection Protection
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Solution Overview
Problem
Long-term hemodialysis catheters are prone to infections, leading to elevated mortality rates and significant healthcare costs due to the failure of antimicrobial coatings that wear off or become ineffective, and the risk of antimicrobial agents entering the bloodstream.
Innovation Solution
A device and method for delivering an antimicrobial agent into the lumen and near the entry region of catheters using an elongate member with an antimicrobial composition, which physically blocks or kills organisms, and a cap system that replenishes the antimicrobial agent with each use, reducing the risk of bloodstream exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antimicrobial coatings are applied to catheters, then infection prevention is improved, but the coatings wear off or become ineffective over time
Solution Approach 1:
The catheter system performs self-service by automatically replenishing antimicrobial agent through the lock solution infusion process. The lock solution acts as a carrier that continuously delivers fresh antimicrobial agent to the catheter surface, eliminating the need for manual reapplication and maintaining consistent protective levels without degradation over time.
Solution Approach 2:
The invention changes the delivery mechanism from a static coating to a dynamic replenishment system. By utilizing the lock solution flow parameters (volume, frequency, concentration), the system maintains optimal antimicrobial agent concentration on the catheter surface, transforming a degrading static state into a renewable dynamic state.
2Reliability
If antimicrobial agents are delivered into the catheter lumen, then infection prevention is improved, but there is risk of agents entering the bloodstream
Solution Approach 1:
The lock solution serves as an intermediary medium that carries the antimicrobial agent to the catheter surface without direct entry into the bloodstream. The agent is delivered through the luminal space and adheres to the catheter wall, creating a protective barrier while the lock solution itself acts as a controlled delivery vehicle that prevents uncontrolled systemic exposure.
Solution Approach 2:
The antimicrobial agent is concentrated locally on the catheter surface where it is needed for infection prevention, rather than being distributed systemically. The lock solution delivery ensures high local concentration at the catheter-lumen interface while minimizing systemic circulation, achieving targeted therapy with reduced harmful effects.
3Reliability
If the proximal end of the catheter is treated with antimicrobial agent, then organism proliferation is prevented, but device complexity increases
Solution Approach 1:
The system utilizes the existing lock solution infusion procedure to automatically deliver the antimicrobial agent, requiring no additional manual steps or complex delivery devices. The standard lock solution process becomes self-sufficient by also performing antimicrobial replenishment, maintaining simplicity while achieving enhanced protection at the proximal end.
Data Source
AI summary
A system, method, and article for delivering an antimicrobial agent into the lumen of a trans-dermal catheter are disclosed. In an embodiment, the system comprises an elongate member configured for insertion into a lumen of a catheter, and the elongate member containing an antimicrobial. In the alternative an antimicrobial agent can be placed on an interior surface of a retaining ring.