Thin-Film Sub-Scalp Electrode Array for Precise Neural Placement
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Solution Overview
Problem
Existing neural recording technologies face challenges in collecting high-quality, chronic data due to difficulties in associating specific neural signals with particular brain regions, and invasive techniques are often avoided by patients and physicians.
Innovation Solution
A thin-film implant device with flexible branch portions and electrodes, connected via electrical traces, is positioned sub-scalp using a curved implantation tool to facilitate chronic neural recordings, allowing for precise signal collection and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If external sensors are used to measure neural signals, then the invasiveness is reduced, but the ability to associate specific signals with particular brain regions deteriorates
Solution Approach 1:
The patent employs thin-film flexible printed circuit board (FPC) material to create an implantable device that can be positioned in the sub-scalp space. The thin-film structure minimizes tissue disruption and mechanical irritation while maintaining the ability to record neural signals with spatial precision, thus resolving the contradiction between reduced invasiveness and preserved measurement precision.
2Measurement precision
If invasive techniques are used to achieve high-quality neural recordings, then the measurement precision is improved, but the ease of operation and patient acceptance deteriorates
Solution Approach 1:
The flexible thin-film construction allows the device to conform to the contours of the skull and sub-scalp space, reducing mechanical stress on surrounding tissues. This flexibility improves patient comfort and acceptance while maintaining the invasive capability to achieve high-quality neural recordings, thereby resolving the contradiction between measurement precision and ease of operation.
3Stability of the object's composition
If traditional rigid implant structures are used, then the mechanical stability is improved, but the ability to navigate through sub-scalp space and adapt to brain contours deteriorates
Solution Approach 1:
The patent utilizes the inherent flexibility of thin-film FPC material to create a dynamically adaptable implant structure. The device can bend and flex during implantation to navigate the sub-scalp space and conform to brain contours, while maintaining mechanical stability for chronic recording. This dynamic property resolves the contradiction between mechanical stability and adaptability.
4Measurement precision
If a high density of electrodes is implemented to improve signal collection, then the measurement precision is improved, but the device complexity and difficulty of implantation increases
Solution Approach 1:
The patent divides the electrode array into multiple segments or channels on the thin-film FPC substrate. This segmentation allows for high electrode density while maintaining manageable device complexity through modular construction. The segmented structure facilitates systematic implantation and reduces the overall complexity of handling and positioning the device, resolving the contradiction between measurement precision and device complexity.
Data Source
AI summary
Devices, systems and techniques are provided to facilitate chronic monitoring of biological signals. An implant device can include a set of branch portions. Each branch portion can include multiple electrodes disposed on a bottom surface and can have vias that connect the electrode to a trace on the top of the branch portion. Each branch portion can include a hole through which a connector (e.g., suture) can be pulled. The connector can also be threaded through a hole in a curved arm of an implantation tool, To implant the implant device, the implantation tool can be inserted through an incision, moved to a target location and stabilized. An end of the connector can then be pulled, which can cause the implant device to move to the target location. The implant device can then be stabilized and the implantation tool explanted.