Multi-channel Brain Stimulation Connector with Indexing
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Solution Overview
Problem
Current medical connectors for brain stimulating and recording probes are bulky, difficult to use in surgical environments, and not compatible with imaging systems, requiring a high-density, sterilizable, and implantable solution that minimizes metal usage and allows for easy subcutaneous implantation.
Innovation Solution
A multi-channel connector system with a male and female configuration, featuring axially arranged electrical contacts, indexing elements for precise orientation, and a design that facilitates secure electrical connections while being compact and compatible with MRI and MEG systems, using materials like PEEK and stainless steel for durability and biocompatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a linear array of cylindrical screw terminals is used for connecting probes to lead extensions, then secure electrical connections can be achieved, but the connector becomes bulky and difficult to use in surgical environments
Solution Approach 1:
The connector is divided into separate male and female components with distinct functions. The male connector integrates with the probe and contains electrical contacts, while the female connector integrates with the lead extension and provides the connection interface. This segmentation allows each component to be optimized independently, making the overall system more compact and surgically usable while maintaining reliable electrical connections through the male-female interface
2Reliability
If multiple screw terminals are used for each electrical connection, then secure connections are achieved, but the connector diameter increases and complicates subcutaneous implantation
Solution Approach 1:
Multiple electrical connections are merged into a single integrated connector interface. The male connector contains multiple electrical contacts arranged in a compact configuration, and the female connector provides corresponding contact points. This merging allows multiple secure electrical connections to be achieved within a single compact connector assembly, avoiding the need for multiple separate screw terminals and reducing the overall connector diameter for easier subcutaneous implantation
3Strength
If traditional metal connectors are used, then durable electrical connections are achieved, but compatibility with MRI and MEG imaging systems is lost
Solution Approach 1:
The connector utilizes composite material construction, combining non-magnetic materials (such as biocompatible polymers or titanium alloys) with conductive elements. The structural components are made from non-magnetic materials that are compatible with MRI and MEG imaging systems, while electrical conductivity is maintained through specialized conductive materials or coatings. This composite approach preserves connector durability and strength while eliminating interference with imaging systems
4Adaptability or versatility
If high-density electrical contacts are packed into the connector, then more stimulation and recording channels are achieved, but manufacturing precision requirements increase
Solution Approach 1:
The electrical contacts are arranged in a nested or layered configuration within the male and female connectors. Multiple contacts are positioned at different radial or axial positions, allowing high-density channel integration without requiring extremely tight manufacturing tolerances. The nested arrangement provides natural alignment features that guide proper insertion and maintain contact integrity even with moderate manufacturing variations
Data Source
AI summary
An implantable connector used with a neurological device and a lead extension includes a male connector having a plurality of electrical contacts axially arranged along the connector, insulated from each other. The connector also includes a female connector having one or more channels axially disposed therein and a plurality of conductors axially arranged on the female connector. The plurality of conductors are electrically insulated from each other, and at least one indexing element is disposed adjacent one or more of the channels. The indexing element allows the male connector to be received into the one or more channels in a defined orientation relative to the channel, thereby forming at least two electrical connections along two or more axial positions. Often the neurological device is a brain stimulating and recording lead. The male and female connectors are often fastened together with a screw or by twist-locking the two members together.