Implantable Component Interface Protrusions Spacing
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Solution Overview
Problem
Cochlear implant upgrade procedures face challenges due to encapsulation in fibrous tissue, making it difficult to implant additional components, and there is a risk of bacterial growth and infection from direct contact between implantable components.
Innovation Solution
The use of integrated protrusions on the interface surfaces of implantable components to create a desired spacing, allowing fluid flow and minimizing contact areas, along with alternative configurations such as radial ridges and biocompatible materials to prevent direct contact and infection, and a pumping mechanism to exchange body fluid and prevent bacterial buildup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If implantable components are placed in direct contact to save space, then device complexity is reduced, but the risk of bacterial growth and infection increases
Solution Approach 1:
A fluid-permeable barrier is introduced as an intermediary layer between implantable components. This barrier prevents direct contact between components, eliminating bacterial growth zones while maintaining fluid flow for nutrient and waste exchange. The barrier resolves the contradiction by mediating between the need for close component placement and the need to prevent infection.
Solution Approach 2:
The barrier is made from fluid-permeable porous material that allows selective passage of fluids while blocking bacterial growth. The porous structure enables nutrient and waste exchange between components without creating enclosed spaces where bacteria could proliferate, thus reducing infection risk while maintaining component proximity.
2Ease of operation
If a fully implantable cochlear implant system is used to eliminate external devices, then ease of operation is improved, but the risk of infection from component contact increases
Solution Approach 1:
The fluid-permeable barrier serves as a mediator that enables safe close positioning of all implantable components (microphone, speech processor, cochlear implant) without direct contact. This allows the fully implantable system to achieve ease of operation while the barrier simultaneously prevents infection by eliminating bacterial growth zones between components.
3Ease of manufacture
If multiple implantable components are positioned close together to reduce surgical complexity, then ease of manufacture is improved, but the difficulty of preventing bacterial growth increases
Solution Approach 1:
The barrier is constructed from fluid-permeable porous material that can be easily integrated into the implantable component assembly. The porous structure naturally prevents bacterial growth by allowing continuous fluid flow while maintaining close component positioning, thus resolving the contradiction between ease of manufacture and prevention of bacterial growth.
4Object-affected harmful factors
If implantable components are spaced apart to prevent bacterial growth, then infection risk is reduced, but device complexity and surgical difficulty increase
Solution Approach 1:
The fluid-permeable porous barrier enables components to remain closely spaced (reducing device complexity and surgical difficulty) while simultaneously preventing bacterial growth through its permeable structure that allows continuous fluid exchange. The material properties resolve the contradiction by providing infection prevention without requiring increased spacing.
Data Source
AI summary
An implantable medical device, comprising a first implantable component having a first interface surface and a second implantable component. The second implantable component has a second interface surface comprising one or more integrated protrusions extending therefrom configured to mate with the first interface surface and to provide a desired spacing between the first and second implantable components.