Permeation Enhancer Hydrogel for Tympanic Membrane Drug Delivery
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Solution Overview
Problem
Current treatments for otitis media, particularly acute otitis media in children, face challenges due to the impermeable nature of the tympanic membrane, leading to limited effectiveness of topical treatments and systemic side effects, along with rising antibiotic resistance and compliance issues.
Innovation Solution
A composition combining chemical permeation enhancers with therapeutic agents and a matrix-forming agent, forming a hydrogel that enhances drug flux across the tympanic membrane, allowing for sustained and localized delivery of antibiotics and analgesics directly to the middle ear, thereby overcoming the impermeability barrier and reducing systemic exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If topical treatments are applied to the tympanic membrane, then localized treatment is achieved, but the impermeable nature of the membrane prevents effective drug delivery
Solution Approach 1:
The patent introduces permeation enhancers as intermediary substances that facilitate drug transport across the tympanic membrane. These enhancers act as mediators between the applied drug formulation and the middle ear, enabling effective delivery despite the membrane's impermeable nature. The enhancers modify the membrane properties or create pathways that allow therapeutic agents to penetrate effectively.
Solution Approach 2:
The patent modifies the physical and chemical parameters of the drug formulation by incorporating permeation enhancers that change the membrane's permeability characteristics. This parameter change enables the membrane to transition from an impermeable state to a permeable state, allowing effective drug delivery while maintaining localized treatment benefits.
2Object-affected harmful factors
If oral analgesic medications are used, then pain relief is achieved, but systemic side effects occur and compliance is poor
Solution Approach 1:
The patent applies local quality by delivering analgesic medications directly to the site of pain (middle ear) through the tympanic membrane, rather than systemically via oral administration. This localized delivery concentrates the therapeutic effect at the infection site while minimizing systemic distribution and associated side effects, improving both pain relief effectiveness and patient compliance.
3Reliability
If systemic antibiotics are administered, then infection is treated, but antibiotic resistance increases and compliance is poor
Solution Approach 1:
The patent implements local quality by delivering antibiotics directly to the middle ear through enhanced permeation of the tympanic membrane. This localized delivery reduces the total systemic antibiotic load required for treatment, thereby decreasing selective pressure that drives antibiotic resistance while maintaining effective infection treatment. It also improves compliance by simplifying the treatment regimen.
4Reliability
If the tympanic membrane is considered impermeable, then drug delivery is blocked, but permeation enhancers can increase flux across the membrane
Solution Approach 1:
The patent employs permeation enhancers as intermediary substances that facilitate drug transport across the tympanic membrane. These enhancers act as mediators that increase the flux of therapeutic agents from the outer ear through the membrane to the middle ear, overcoming the impermeable barrier while maintaining the membrane's protective function.
Solution Approach 2:
The patent changes the permeability parameter of the tympanic membrane by incorporating permeation enhancers in the drug formulation. This parameter modification increases the membrane's permeability to therapeutic agents, enabling effective drug flux across the barrier without compromising the membrane's structural integrity or protective role.
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
This approach enables high concentrations of antibiotics in the middle ear, potentially eradicating bacterial otitis media with fewer systemic side effects, improving pain relief, and reducing antibiotic resistance and recurrence, while maintaining compliance and minimizing the need for invasive treatments.
Implementation Method 1
a permeation enhancer or a combination of permeation enhancers, wherein the permeation enhancer or combination of permeation enhancers increases the flux of the therapeutic agent or combination of therapeutic agents across a barrier
Implementation Method 2
a matrix forming agent or a combination of matrix forming agents, wherein the matrix forming agent or combination of matrix forming agents comprises a polymer
Data Source
AI summary
The present disclosure provides compositions and methods for delivery of therapeutic agents across a barrier. The compositions include a therapeutic agent (e.g., antimicrobial agent, antibiotic, or anesthetic agent), a permeation enhancer which increases the flux of the therapeutic agent across the barrier, and a matrix forming agent, wherein the composition comprises between about 0.5-5.0% wt/vol of a permeation enhancer that is sodium dodecyl sulfate; wherein the compositions comprise between about 0.5-2.5% wt/vol of a permeation enhancer that is bupivacaine; wherein the compositions comprise between about 1.5-12.0% wt/vol of a permeation enhancer that is limonene; and wherein the compositions comprise between about 9.0-19.0% wt/vol of a polymer that is poloxamer 407-poly(butoxy)phosphoester; and optionally further comprises between about 0.01-0.50% wt/vol of another therapeutic agent that is a sodium channel blocker anesthetic agent (e.g., tetrodotoxin).