Photo-polymerizable Hydrogel Scaffold for Tympanic Membrane Repair
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Solution Overview
Problem
Current treatments for chronic tympanic membrane perforations require surgical intervention, are dependent on surgeon skill, and lack direct drug delivery to the middle ear, with existing materials like Gelfoam and Merogel posing allergic risks and requiring autografts or patches that may not adhere properly.
Innovation Solution
Development of photo-polymerizable, injectable otologic compositions that form a polymer matrix upon activation, providing a scaffold for cell growth and drug delivery directly to the middle ear, reducing the need for surgical precision and minimizing allergic reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surgical packing materials like Gelfoam or Merogel are used to treat TM perforations, then the middle ear can be filled and provide a barrier during healing, but the materials pose allergic risks and require additional autografts or patches that may not adhere properly
Solution Approach 1:
The invention changes the chemical composition parameters of packing materials from animal-derived gelatin to synthetic polymers like polyethylene glycol and poloxamer, eliminating allergens while maintaining the desired gel-forming and barrier properties for reliable TM perforation healing
Solution Approach 2:
The invention creates a composite material system combining multiple synthetic polymers (polyethylene glycol, poloxamer) with therapeutic agents, forming a unified composition that simultaneously provides allergic-free packing, drug delivery, and enhanced tissue adhesion without requiring separate autografts or patches
2Reliability
If current otologic packing products are used, then the middle ear can be packed to support healing, but none of the products deliver drugs directly to the middle ear
Solution Approach 1:
The invention merges the packing material function with drug delivery function into a single integrated composition, combining synthetic polymer matrices with therapeutic agents to simultaneously provide middle ear packing support and direct drug delivery for infection prevention
Solution Approach 2:
The invention creates a universal composition that performs multiple functions: acts as a packing material to fill the middle ear, provides a barrier during healing, delivers therapeutic drugs directly to the infection site, and promotes tissue adhesion, replacing the need for multiple separate products
3Ease of operation
If eardrops are used to deliver drugs to the middle ear, then drug delivery is achieved, but the main drug used (ciprodex) stings when applied, which is problematic for children
Solution Approach 1:
The invention uses the synthetic polymer composition as an intermediary vehicle that delivers therapeutic agents directly to the middle ear without the stinging sensation associated with traditional eardrops like ciprodex, making drug administration comfortable for children while maintaining ease of application
4Reliability
If autografts or patches are used to repair TM perforations, then larger perforations can be treated, but the success rate is highly dependent on surgeon skill and precise placement is required
Solution Approach 1:
The invention enables the packing material to self-adhere to the tympanic membrane tissue through inherent adhesive properties of the synthetic polymer composition, eliminating the need for precise surgical placement of autografts or patches and reducing dependence on surgeon skill while maintaining high repair success rates
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 solution aids in the repair of chronic TM perforations by forming a biodegradable scaffold that adheres well to surrounding tissue, allows controlled drug release, and eliminates the need for precise surgical placement of autografts or patches, enhancing healing and reducing infection risk.
Implementation Method 1
photo-polymerizable, injectable otologic compositions that form a polymer matrix upon activation
Data Source
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AI summary
Otologic materials and methods are provided. For example, a cell-adhesive, biodegrable hydrogel scaffold loaded with time-released drugs for repairing chronic tympanic membrane perforations is disclosed, methods of making same and administering same are provided. This hydrogel may promote vascular in-growth and pithelial cell growth of the tympanic membrane with the purpose of closing the perforation and providing a barrier between the external and middle ear. The hydrogel is initially a liquid polymer that only gels upon exposure to specific conditions, such as exposure to light. This scaffold may simultaneously induce repair of the tympanic membrane while preventing or alleviating middle ear infection, thus filling a void in current tympanic membrane perforation therapies.