Ruggedized Penetrating Electrode Arrays for Tough Tissue Insertion
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Solution Overview
Problem
Current electrode arrays are limited in their ability to penetrate tougher tissues such as cardiac and neural tissues, as they are often too small and weak for insertion into these mechanically challenging areas.
Innovation Solution
A ruggedized penetrating electrode array system is developed, featuring a probe assembly with an elongate shank and a more rigid elongate carrier, allowing for secure positioning and insertion into tough tissues, and a method of fabricating these arrays that includes patterning an electrode carrier body and securing it to a probe platform for enhanced structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electrode arrays are made small and delicate for precise positioning, then measurement precision is improved, but strength and ability to penetrate tough tissue deteriorates
Solution Approach 1:
The system is divided into two functional segments: a delicate electrode array for precise positioning and signal detection, and a separate rigid carrier structure for mechanical support and tissue penetration. The electrode array can be detached from the carrier after insertion, allowing the delicate sensing portion to be positioned precisely while the carrier provides the necessary strength for insertion.
Solution Approach 2:
The rigid carrier acts as an intermediary tool that enables the delicate electrode array to penetrate tough tissue. The carrier provides mechanical strength and structural support during the insertion process, while the electrode array itself remains delicate for precise positioning. Once inserted, the carrier fulfills its mediating role and the electrode array can function independently.
2Manufacturing precision
If electrode contacts are positioned in two-dimensional planes, then manufacturing precision is improved, but adaptability to three-dimensional tissue structures deteriorates
Solution Approach 1:
The system transitions from two-dimensional electrode contact arrangement to three-dimensional adaptability by allowing multiple planar arrays to be positioned at different depths and orientations within the tissue. The rigid carrier structure enables the electrode contacts to be distributed in three-dimensional space while maintaining precise two-dimensional positioning within each plane, thus achieving both manufacturing precision and three-dimensional adaptability.
Data Source
AI summary
Systems and methods for ruggedized neural probes are provided. Such probes may be adapted for penetrating tissue. An exemplary ruggedized penetrating electrode array system includes an elongate shank having one or more electrodes disposed on at least one exterior surface thereof and a backend structure. A proximal end of the elongate shank is secured to the backend structure. The exemplary array system further includes an elongate carrier secured to the backend structure and extending away from the backend structure toward the distal end of the elongate shank, the elongate carrier being more rigid than the elongate shank. Methods for fabricating such an array system are also provided.