Cochlear Implant Electrode Lead Proximity Detection
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Solution Overview
Problem
Current methods for determining electrode lead proximity to cochlear tissue during cochlear implant insertion are expensive, inconvenient, and may expose patients to risks, especially for those without residual hearing ability, as they often rely on imaging technology or ineffective acoustic stimulation.
Innovation Solution
A cochlear implant system that uses a sound processor to apply equal and opposite phase pulses to form a dipole, generating a field that detects energy magnitude reflections from cochlear tissue, allowing for real-time proximity determination without additional equipment, suitable for all patients regardless of hearing ability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If imaging technology (x-ray, fluoroscopic, CT) is used to determine electrode lead proximity, then measurement precision is improved, but device complexity and cost increase, and patient exposure to harmful radiation occurs
Solution Approach 1:
The patent extracts the proximity detection function from complex external imaging systems and implements it within the cochlear implant system itself using simple electrodes and impedance measurement circuitry already present in the implant, eliminating the need for expensive imaging equipment while maintaining detection capability
Solution Approach 2:
The patent uses inexpensive electrical impedance measurement instead of expensive imaging technology, sacrificing the long-term durability of imaging equipment by using a simple, low-cost electrical measurement approach that is sufficient for the surgical procedure context
2Device complexity
If acoustic stimulation (electrocochleographic stimulation) is used to determine electrode lead proximity, then device complexity is reduced, but reliability deteriorates for patients without residual hearing ability
Solution Approach 1:
The patent makes the proximity detection method universal by using electrical impedance measurement that works for all patients regardless of their hearing status, unlike acoustic stimulation which only works for patients with residual hearing. The same electrodes used for stimulation can perform both stimulation and proximity detection functions
3Measurement precision
If current proximity detection methods are used, then measurement precision is improved, but object-affected harmful factors increase due to patient exposure to radiation and procedural risks
Solution Approach 1:
The patent converts the electrical properties of tissue (impedance characteristics) into a beneficial detection mechanism, where the natural electrical differences between cochlear fluid and bone provide the basis for safe proximity detection without radiation exposure, turning electrical conductivity from a potential interference into the detection mechanism itself
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
This method provides safe and effective real-time monitoring of electrode lead proximity, reducing the risk of cochlear trauma and eliminating the need for costly imaging technology, making the insertion procedure safer and more universally applicable.
Implementation Method 1
the application of the first and second pulses forms a dipole that generates a field
Implementation Method 2
detect an energy magnitude of the field that reflects from cochlear tissue located within the field
Data Source
AI summary
An illustrative proximity detection system directs a first electrode of an electrode lead to apply a first pulse and directs a second electrode of the electrode lead to apply a second pulse concurrently with the first pulse so as to form a dipole that generates a field. The first and second electrodes are each configured as stimulating electrodes that apply stimulation to the cochlear tissue when the electrode lead is located at a resting position subsequent to a surgical insertion of the electrode lead into a cochlea of a patient. After the pulses are applied, and based on an energy magnitude of the field that is detected to reflect from cochlear tissue located within the field, the proximity detection system determines a proximity of the electrode lead to the cochlear tissue. Corresponding systems and methods are also disclosed.