Paranasal Sinus Implant with Antimicrobial Coating and Flexible Conduit
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Solution Overview
Problem
Current treatments for paranasal sinus conditions, such as sinusitis, face challenges including inadequate drug delivery, discomfort during surgical interventions, and susceptibility to biofilm formation with existing implant devices used for accessing paranasal sinuses.
Innovation Solution
A paranasal sinus access implant device is designed with a conduit connecting the lacrimal apparatus to the paranasal sinus through a fistula, featuring materials and geometries that enhance implantation ease, patient comfort, and biofilm resistance, including varying hardness, surface roughness, wetting agents, antimicrobial agents, and radiopaque materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surgical interventions are used to access paranasal sinuses, then drainage and irrigation can be achieved, but patient discomfort and moderate symptomatic improvement only are experienced
Solution Approach 1:
The implant device incorporates a soft, flexible outer coating that is compliant with surrounding tissues, reducing mechanical irritation and discomfort. The conduit wall is designed to be flexible yet sufficient to allow passage of instruments, balancing patient comfort with procedural accessibility.
Solution Approach 2:
The device parameters including hardness, surface roughness, and dimensions are optimized to facilitate ease of implantation while minimizing tissue trauma. The conduit has specific wall thickness and flexibility parameters that allow it to be inserted through a fistula while maintaining structural integrity and patient comfort.
2Ease of operation
If existing implant devices are used for paranasal sinus access, then direct access to sinuses is provided, but biofilm formation occurs on exposed surfaces
Solution Approach 1:
The device incorporates antimicrobial agents and surface treatments that convert the potentially harmful exposed surfaces into beneficial structures. The antimicrobial coating transforms the surface from a biofilm-prone area into a biofilm-resistant surface, turning a vulnerability into a strength.
Solution Approach 2:
The implant device uses composite materials combining structural integrity materials with antimicrobial surface treatments. The conduit may have a core material providing mechanical strength with a surface coating providing biofilm resistance, creating a multi-functional composite structure.
3Ease of operation
If current drug therapies are administered orally or topically, then treatment is simplified, but inadequate concentration of medication reaches the paranasal sinus
Solution Approach 1:
The implant device serves as an intermediary delivery vehicle between the administration site and the paranasal sinus. It incorporates channels and cavities that can be filled with medication, allowing direct transport of concentrated therapeutic agents to the target area, bypassing the inefficiency of oral or topical absorption.
Solution Approach 2:
The device is designed to perform multiple functions: providing mechanical access to the sinus, serving as a medication delivery conduit, and potentially functioning as an irrigation channel. This multi-functionality eliminates the need for separate access and delivery systems, concentrating medication delivery while maintaining ease of administration.
4Strength
If the conduit wall is made thicker to prevent collapse, then structural integrity is improved, but passage of instruments becomes difficult
Solution Approach 1:
The conduit wall is designed with dynamic properties, being flexible enough to collapse slightly during instrument passage to facilitate insertion, then recovering its shape to maintain structural integrity during the procedure. The material properties are tuned to provide time-dependent deformation characteristics that satisfy both insertion and structural requirements.
Solution Approach 2:
The conduit wall thickness is not uniform but varies locally to provide different levels of strength and flexibility in different regions. Thicker sections provide structural support where needed, while thinner sections facilitate instrument passage, creating an optimized non-uniform structure.
Data Source
AI summary
A paranasal sinus access implant device may include one or more material or geometric features that may enhance performance of one or more portions of the implant device, for example an exposed surface including an antimicrobial agent. Various products and methods may include or use such an implant device.