Inner Ear Drug Delivery Device with Deployable Outlet
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Solution Overview
Problem
Current drug delivery methods for the inner ear, such as cochlear implants, face challenges including inefficient drug distribution, high concentrations at the base with low concentrations towards the apex, limited control over dosing, and risk of damage to inner ear structures during insertion, leading to insertion trauma and uneven drug distribution.
Innovation Solution
A therapeutic substance delivery device that attaches to a first tissue area and deploys a therapeutic substance outlet to a remote location within the inner ear, using a reservoir and delivery tube system with a valve and actuation mechanism to ensure controlled and sustained drug delivery, minimizing trauma and achieving even distribution from base to apex.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a reservoir and delivery tube system is used for drug delivery to the inner ear, then controlled and sustained drug delivery is achieved, but the device complexity increases
Solution Approach 1:
The delivery device is segmented into distinct functional components: a reservoir for drug storage, a delivery tube for transport, a valve for flow control, and an actuation mechanism for deployment. This segmentation allows each component to be optimized independently while working together to achieve controlled, sustained drug delivery over extended periods.
Solution Approach 2:
The delivery tube is nested within the reservoir structure, and the valve mechanism is integrated into the delivery system. This nesting reduces overall device volume and complexity while maintaining the functionality of each component. The actuation mechanism is also integrated within the existing structure rather than adding separate external components.
2Manufacturing precision
If the outlet is deployed to a remote location within the inner ear, then even drug distribution from base to apex is achieved, but the risk of insertion trauma increases
Solution Approach 1:
The outlet is designed with local quality variations - the delivery tube has different structural characteristics at different locations, with the distal end configured specifically for gentle insertion into the scala tympani. The outlet structure includes features that facilitate even drug distribution to specific regions while minimizing mechanical trauma during placement.
Solution Approach 2:
The delivery device incorporates protective features beforehand - the outlet is designed with rounded edges and smooth surfaces to prevent mechanical damage during insertion. The actuation mechanism is designed to deploy the outlet gently rather than forcefully, and the delivery tube material is selected to be biocompatible and non-irritating to inner ear structures.
3Area of stationary object
If the outlet is moved away from the attachment site, then drug delivery to remote tissue areas is achieved, but the device stability decreases
Solution Approach 1:
The delivery tube is designed with dynamic properties - it is flexible enough to allow the outlet to move to remote locations within the inner ear while maintaining a controlled configuration. The tube has appropriate rigidity to prevent collapse during deployment but flexibility to conform to the anatomy of the scala tympani, ensuring both coverage area and device stability.
Solution Approach 2:
The delivery tube acts as an intermediary between the stationary reservoir (attached to the skull) and the mobile outlet (positioned in the scala tympani). This intermediary component transmits drug flow while accommodating the spatial separation between the attachment site and the remote delivery location, maintaining system stability despite the outlet's displaced position.
Data Source
AI summary
An apparatus including a therapeutic substance delivery device configured for attachment to a first tissue area internal of a recipient, the delivery device configured to enable movement of a therapeutic substance outlet of the delivery device proximate a second tissue area away from the first tissue area after attachment to the first tissue area to deliver the therapeutic substance from the outlet while implanted in the recipient.