Magnetic Cochlear Implant Insertion Module With Force-Release Stop

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Solution Overview

Problem

Existing methods for inserting cochlear implant electrode arrays face challenges in detecting the optimal insertion depth to preserve residual hearing, with manual techniques being subjective and automated systems facing regulatory issues.

Innovation Solution

A magnetic safety module using paired magnets that separate at a predefined force threshold to control the insertion depth, preventing further insertion when the force exceeds this threshold, thereby protecting the cochlea from damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If manual insertion techniques are used to detect insertion depth, then the surgeon can perceive resistance changes, but the detection is subjective and lacks precision

Engineering Contradiction:

Improveinsertion depth detection precisionVSAvoidinsertion system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent replaces the manual mechanical detection system with a magnetic field-based sensing system. Force sensors detect insertion forces through magnetic interactions between magnets attached to the electrode array and magnets in the force sensor, converting mechanical force detection into a measurable electrical signal for precise, objective insertion depth monitoring.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If automated robotic insertion tools with force sensors are used, then insertion force detection is objective, but regulatory issues arise

Engineering Contradiction:

Improveinsertion force detection reliabilityVSAvoidinsertion automation level

Core Design Contradiction:

ReliabilityVSExtent of automation

Solution Approach 1:

The magnetic safety module enables the insertion system to self-regulate by automatically detecting when insertion forces exceed safe thresholds and stopping further insertion. The force sensors continuously monitor forces and trigger automatic cessation of insertion, allowing the system to protect itself without requiring complex automated robotic control or external regulatory approval.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent implements a feedback mechanism where force sensors continuously monitor insertion forces and provide real-time information about resistance changes. When the magnetic attraction force between the magnets exceeds a predefined threshold, the system receives feedback and automatically stops insertion, creating a closed-loop control system that ensures safety without full automation.

Inventive Principle:

Principle #23Feedback

3Productivity

If deep insertions are performed to maximize cochlear implant functionality, then speech comprehension improves, but residual hearing damage risk increases

Engineering Contradiction:

Improvespeech comprehension performanceVSAvoidcochlear damage risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by pre-calibrating the magnetic attraction force between the magnets to correspond to a safe insertion force threshold. Before insertion begins, the magnetic safety module is configured with predetermined magnetic forces that represent maximum safe insertion forces, allowing the system to prevent excessive insertion forces before they can cause damage.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The magnetic safety module acts as an intermediary between the insertion tool and the cochlear implant electrode array. The magnets in the force sensor mediate the force transmission, allowing the system to monitor and control insertion forces in real-time, preventing direct transmission of excessive forces that could damage the cochlea while still enabling deep insertions when safe.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

The magnetic safety module ensures precise control of insertion depth, reducing the risk of cochlear damage and preserving residual hearing by stopping insertion at the appropriate point.

Implementation Method 1

coupling, via magnetic attraction, a second magnet to the first magnet

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Implementation Method 2

The magnetic attraction between the first and the second magnets define an insertion force threshold which if exceeded by the insertion force causes the first and second magnets to release

Methodology Applied

Scientific EffectMagnetic force threshold: Magnetism

Data Source

PatentUS20260027352A1Magnetic safety module and methodology to avoid trauma during cochlear implant insertions

Publication Date: 2026.01.29 MED EL ELEKTROMEDIZINISCHE GERAETE GMBH

AI summary

A system and method for inserting a cochlear implant electrode into a cochlea. A first magnet is fastened to a cochlear implant electrode. A second magnet is coupled, via magnetic attraction, to the first. A force is placed on the second magnet to push the first magnet, and thus also the cochlear implant electrode, into the cochlea. If a threshold force is exceeded, the first magnet and second magnet will separate, preventing a force on the second magnet from causing insertion of the cochlear implant electrode into the cochlea.