Hypercompressed Ophthalmic Microparticles for Sustained Drug Release
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Solution Overview
Problem
Current ophthalmic drug delivery systems face challenges with poor absorption and frequent dosing due to rapid turnover of aqueous humor and tear film, necessitating the development of a long-acting controlled release device that maintains structural integrity and stability for extended therapeutic delivery.
Innovation Solution
A controlled release ophthalmic dispensing device comprising hypercompressed microparticles or nanoparticles of a therapeutically compatible polymer and ophthalmic therapeutic agents, designed for placement in various eye spaces to provide sustained release over an extended period without patient discomfort or active involvement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional ophthalmic drug delivery systems are used, then the medication can be administered to the eye, but the absorption is poor and frequent dosing is required due to rapid turnover of aqueous humor and tear film
Solution Approach 1:
The device is segmented into multiple functional layers including a drug-containing core surrounded by copolymer membranes, with each layer serving a specific function in controlling drug release and maintaining structural integrity during rapid aqueous humor turnover
Solution Approach 2:
The device uses composite materials consisting of a drug-containing core made from one or more pharmaceutically active agents combined with a matrix of biocompatible polymers, creating a multilayered structure that provides both mechanical stability and controlled drug diffusion
2Duration of action of stationary object
If a sustained delivery system with extended release period is designed, then the need for frequent dosing is reduced, but maintaining structural integrity and stability for extended periods becomes challenging
Solution Approach 1:
The device utilizes parameter changes in the copolymer membranes, where the membrane thickness and polymer composition are specifically adjusted to control the rate of drug diffusion while maintaining structural stability over the 7-day release period
Solution Approach 2:
The device is pre-designed and sterilized with the complete multilayered structure before insertion, including the drug-containing core surrounded by copolymer membranes, so that it is ready for immediate sustained release without requiring assembly or activation in the eye
3Reliability
If the device is designed for long-term retention in the eye, then patient compliance is improved, but the device must remain stable during handling and placement while disintegrating to release the drug effectively
Solution Approach 1:
The device exhibits dynamic behavior, remaining structurally intact during handling and placement but designed to disintegrate and release the drug over the 7-day period, transitioning from a stable insertion form to an active drug delivery state
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 device ensures stable and prolonged release of ophthalmic therapeutic agents, maintaining structural integrity during handling and placement, and disintegrating to release the drug effectively, offering a non-toxic, biodegradable solution for chronic ocular conditions without the need for frequent replacements.
Implementation Method 1
The rate of drug diffusion is controlled by the polymer composition, the membrane thickness, and the solubility of the drug
Implementation Method 2
a matrix that is made by hypercompressing units of microparticles or nanoparticles that comprise a therapeutically compatible polymer and an ophthalmic therapeutic agent
Data Source
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AI summary
An ophthalmic dispensing device having a polymer which is combined with an ophthalmic therapeutic agent in the form of a microparticle which is hypercompressed to form a controlled release dispensing device for ophthalmic use.