Cochlear Implant Electrode Array Real-Time Insertion Monitoring
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Solution Overview
Problem
Current cochlear implant insertion methods lack real-time feedback on electrode array placement within the cochlea, leading to potential misplacement and reduced performance, as surgeons cannot visually confirm the exact insertion depth during surgery, and imaging techniques are often unavailable or delayed.
Innovation Solution
A method and system that measure electrode impedance values to determine the insertion status of the electrode array in real-time, using conductivity measurements between contacts and a remote ground electrode or other contacts, providing immediate feedback on user interfaces to ensure accurate placement and detect issues like tip fold-overs, buckling, or air bubbles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If imaging techniques like X-ray or MRI are used to determine electrode array placement, then positioning accuracy is improved, but device complexity and surgical time increase due to additional equipment and post-surgical delays
Solution Approach 1:
The system continuously monitors impedance values during electrode array insertion and provides real-time feedback to the surgeon through a display interface. This allows immediate detection of proper insertion depth without requiring post-surgical imaging, thereby improving placement accuracy while avoiding additional equipment and delays
Solution Approach 2:
The patent replaces complex mechanical imaging systems (X-ray, MRI) with an electrical measurement system that uses impedance sensing. This substitution provides equivalent or superior placement information without the need for heavy imaging equipment, reducing device complexity and enabling intraoperative decision-making
2Manufacturing precision
If imaging techniques are used to confirm electrode array insertion, then placement accuracy is improved, but loss of time occurs due to delayed imaging after surgery
Solution Approach 1:
The system performs placement verification during the surgical procedure itself by continuously monitoring impedance values as the electrode array is inserted. This preliminary action eliminates the need for post-surgical imaging delays, allowing the surgeon to confirm proper placement before completing the surgery
Solution Approach 2:
Real-time impedance monitoring provides immediate feedback during insertion, enabling the surgeon to adjust placement if needed before finalizing the surgery. This eliminates time loss associated with delayed imaging and potential re-surgery
3Manufacturing precision
If real-time impedance monitoring is implemented, then electrode array placement accuracy is improved, but device complexity increases due to additional measurement and control circuitry
Solution Approach 1:
The impedance measurement circuitry serves multiple functions: it monitors electrode array insertion depth, detects proper placement, and identifies potential complications. This multi-functionality justifies the added circuitry complexity by providing comprehensive surgical guidance without requiring separate systems
Solution Approach 2:
The electrode array itself serves as the sensing element by utilizing its inherent electrical properties (impedance) that change with insertion depth. This self-service approach minimizes additional complexity as the existing electrode structure provides the measurement signal without requiring separate sensors
4Device complexity
If no real-time feedback is provided during electrode array insertion, then device complexity is reduced, but loss of information occurs regarding exact insertion depth
Solution Approach 1:
The system provides continuous feedback during insertion by monitoring impedance changes and displaying real-time status information. This prevents information loss about insertion depth by making the data available to the surgeon during the procedure, enabling informed decision-making without excessive system complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables real-time monitoring and correction of electrode array placement during surgery, distinguishing between tissue and air bubble-induced impedance changes, thereby optimizing cochlear implant performance and reducing the need for post-surgical adjustments.
Implementation Method 1
measuring an electrode impedance value (EIV) associated with the electrode contact
Data Source
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AI summary
A method of determining insertion status of a cochlear implant electrode array into a cochlea of a patient is provided. The method includes measuring conductivity associated with an electrode in the electrode array. Insertion status of the electrode is determined based, at least in part, on the measured conductivity.