Amino Acid Poly(ester Urea) Films for Localized Antibiotic Delivery
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Solution Overview
Problem
Cardiac implantable electronic device (CIED) infections remain a significant complication due to ineffective systemic antibiotic delivery, leading to high morbidity, costly treatments, and a substantial healthcare burden, with conventional methods failing to adequately address localized infection control.
Innovation Solution
Development of a drug-loaded amino acid-based poly(ester urea) film for localized antibiotic delivery, specifically an antibiotic-loaded L-valine poly(ester urea) film, which is degradable and can be applied to CIEDs or other implantable devices to provide sustained antibiotic release, reducing infection instances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If systemic antibiotic delivery is used, then antibiotic coverage is provided, but infection control effectiveness is insufficient and systemic toxicity occurs
Solution Approach 1:
The patent applies local quality by transitioning from systemic antibiotic delivery to localized delivery at the implant site. The film is applied directly to the implant surface, creating a localized reservoir that releases antibiotics specifically where needed, thereby improving infection control effectiveness while avoiding systemic toxicity associated with conventional systemic administration.
Solution Approach 2:
The patent uses an intermediary approach by introducing a poly(ester urea) film as a carrier medium between the antibiotic source and the infection site. This film serves as a reservoir that slowly releases antibiotics locally, acting as a mediator that improves delivery effectiveness while preventing direct systemic exposure and associated toxicity.
2Reliability
If localized antibiotic delivery is implemented, then high concentration antibiotics are delivered to the implant site, but device complexity increases
Solution Approach 1:
The patent employs flexible shells and thin films by using a poly(ester urea) film as the delivery carrier. This thin film can be applied directly to the implant surface and provides localized antibiotic release through its degradation, achieving effective localized delivery without requiring complex device structures or multiple components.
Solution Approach 2:
The patent utilizes composite materials by incorporating antibiotics within the poly(ester urea) film matrix. This composite structure allows the film to serve both as a structural element and as a drug reservoir, achieving localized delivery effectiveness while avoiding the complexity of separate delivery mechanisms.
3Reliability
If conventional systemic antibiotic administration is used, then infection prevention is attempted, but treatment cost and healthcare burden remain high
Solution Approach 1:
The patent applies the taking out principle by extracting the antibiotic delivery function from the systemic circulation and concentrating it at the implant site through the film. This localized extraction reduces the total amount of antibiotic needed systemically, thereby lowering treatment costs and healthcare resource consumption while maintaining effective infection prevention.
Solution Approach 2:
The patent implements continuity of useful action through the sustained release mechanism of the poly(ester urea) film. The film degrades continuously over time, providing prolonged localized antibiotic release that maintains effective infection prevention without requiring repeated systemic administration, thus reducing overall healthcare resource consumption.
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 film achieves effective localized antibiotic delivery, reducing CIED infection rates by providing a high concentration of antibiotics directly to the implant site, minimizing systemic toxicity, and prolonging the release of antibiotics to prevent chronic infections, thus potentially lowering healthcare costs and improving patient outcomes.
Implementation Method 1
degradable amino acid based poly(ester urea) film
Data Source
AI summary
In various embodiments, the present invention is directed to a drug-loaded amino acid based poly(ester urea) pouch or pocket sized to receive implanted devices that produces localized drug delivery. In some embodiments, the present invention is directed to an antibiotic-loaded L-Valine poly(ester urea) pouch or pocket that provides localized antibiotic delivery for CIEDs or other implanted devices. In one or more embodiments, the amount and rate of antibiotic release are dependent upon the thickness and loading concentration of the film. This dependence of release on thickness and loading concentration gives a handle to fabricate PEU-A pouches or pockets with any desired release profile that can locally deliver the therapeutically relevant amount of antibiotic.