Cochlear Implant Echo Location for Precise Insertion
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Solution Overview
Problem
Surgeons face challenges in accurately positioning cochlear implant stimulating assemblies within the cochlea due to the inability to monitor the insertion path in real time, leading to potential issues like tip foldover, cochlea perforation, and suboptimal proximity to target neural elements, especially with advanced stimulation strategies and smaller assembly sizes.
Innovation Solution
The implementation of echo location techniques using energy pulses emitted and detected by transmitters and receivers integrated into the stimulating assembly, allowing for real-time monitoring of the assembly's position and state during insertion, including distance from cochlea walls, speed, and depth, to facilitate controlled and precise placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional insertion methods are used without real-time monitoring, then the insertion process is simpler and faster, but positioning precision and safety deteriorate due to inability to monitor insertion path
Solution Approach 1:
The echo location device is nested within the stimulating assembly, with the transmitter and receiver integrated into the same implantable unit. This allows the monitoring function to be embedded within the existing device structure, improving positioning precision without significantly increasing overall device complexity
Solution Approach 2:
An echo location device acts as an intermediary between the stimulating assembly and the surgeon, providing real-time feedback about insertion path and position. This mediator enables precise monitoring without requiring direct visual access to the deep cochlear structures
2Object-affected harmful factors
If smaller assembly sizes are used to improve implantability, then trauma to cochlear structures is reduced, but measurement capability deteriorates due to limited space for sensors
Solution Approach 1:
The stimulating assembly serves multiple functions: electrical stimulation of the cochlear nerve and echo location for monitoring insertion. By making the assembly universal, it can perform both stimulation and measurement functions without requiring separate larger structures, thus reducing trauma while maintaining measurement capability
Solution Approach 2:
The echo location components (transmitter and receiver) are nested within the stimulating assembly structure, allowing compact integration of measurement functionality within the small implantable form factor, thereby maintaining measurement capability while minimizing cochlear trauma
3Measurement precision
If real-time monitoring is implemented during insertion, then positioning precision is improved, but energy consumption increases due to continuous pulse emission and detection
Solution Approach 1:
The echo location system uses periodic pulse emission rather than continuous monitoring. The transmitter emits energy pulses at intervals, and the receiver detects reflections at corresponding intervals, providing sufficient positioning information while significantly reducing energy consumption compared to continuous operation
Solution Approach 2:
The system uses partial action by emitting energy pulses only when positioning information is needed during critical insertion phases, rather than continuous monitoring. This provides adequate positioning precision during insertion while minimizing overall energy consumption during the implantation procedure
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 atraumatic and controlled insertion with improved precision, reducing the risk of adverse events and ensuring closer proximity to target neural elements, enhancing cochlear implant performance and safety.
Implementation Method 1
an echo transmitter disposed in the stimulating assembly configured to emit an energy pulse within the cochlea
Implementation Method 2
an echo receiver disposed in the stimulating assembly configured to detect a portion of the energy pulse reflected from tissue of the cochlea
Implementation Method 3
an echo receiver disposed in the stimulating assembly configured to detect a portion of the energy pulse reflected from tissue of the cochlea
Data Source
AI summary
Presented herein are echo location techniques to obtain information about an implantable component of a hearing prosthesis relative to a recipient's tissue. The hearing prosthesis may comprise an elongate stimulating assembly configured to be implanted in a recipient's where an echo transmitter is disposed in the stimulating assembly. The echo transmitter is configured to emit an energy pulse within the recipient and an echo receiver disposed in the stimulating assembly is configured to detect a portion of the energy pulse reflected from tissue of the recipient.