Vestibular Implant Closed-Loop Stimulation Control
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Solution Overview
Problem
Current medical devices for vestibular system stimulation lack the ability to dynamically adjust electrical stimulation based on patient movement and response, leading to inefficient therapy and potential unnecessary stimulation, which can impact the effectiveness and longevity of the treatment.
Innovation Solution
An implantable medical device system that includes sensors and processing circuitry to detect movement and electrical signals, allowing for closed-loop adjustment of electrical stimulation parameters, such as amplitude and frequency, to match the patient's activity level and reduce unintended stimulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous electrical stimulation is delivered to the vestibular organ, then therapeutic effect is maintained, but energy consumption increases and device lifespan decreases
Solution Approach 1:
The patent implements dynamic adjustment of stimulation parameters based on real-time sensor feedback. The processing circuitry continuously monitors patient movement and physiological signals, then modulates stimulation amplitude, frequency, and pulse width accordingly. This dynamic approach ensures therapeutic efficacy is maintained only when needed, reducing unnecessary energy consumption during periods when stimulation is not required for balance maintenance.
Solution Approach 2:
The system incorporates multiple sensors (accelerometers, gyroscopes, and physiological sensors) that provide continuous feedback about patient movement, head position, and neural response. The processing circuitry analyzes this feedback to determine optimal stimulation parameters in real-time, creating a closed-loop control system that adapts to changing patient needs and minimizes energy waste while preserving therapeutic benefits.
2Productivity
If electrical stimulation parameters are adjusted dynamically based on patient movement, then stimulation efficiency improves, but device complexity increases
Solution Approach 1:
The patent integrates multiple sensor types (motion sensors, physiological sensors) and processing functions within a single implantable device unit. The processing circuitry performs multiple functions including signal acquisition, filtering, feature extraction, and stimulation parameter calculation. This multi-functional integration achieves high stimulation efficiency through comprehensive monitoring and adaptive control while minimizing the number of separate components, thereby reducing overall device complexity.
3Ease of operation
If electrical stimulation is delivered without monitoring patient response, then device operation is simple, but therapeutic effectiveness decreases
Solution Approach 1:
The system employs self-service through autonomous closed-loop control. The processing circuitry automatically monitors patient response via implanted sensors, analyzes the feedback signals, and adjusts stimulation parameters without requiring external intervention. This self-regulating mechanism ensures optimal therapeutic effectiveness is maintained while keeping the device operationally simple, as no manual adjustment or external monitoring is needed by the patient or clinician.
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 approach enhances the efficacy of vestibular stimulation by ensuring that electrical stimulation is delivered optimally based on the patient's activity state, improving balance and reducing symptom effects while extending the device's lifespan and minimizing unnecessary stimulation.
Implementation Method 1
a medical device (e.g., an IMD) outputs electrical simulation signals via one or more electrodes on one or more implanted leads to regions of the vestibular organ to improve the patient's sense of balance
Implementation Method 2
detect, via the implantable sensor, an electrical signal of a patient that is generated in response to an electrical stimulation signal transmitted by the vestibular implant
Data Source
AI summary
A vestibular implant system including a memory; an implantable sensor; a vestibular implant; and processing circuitry coupled to the memory. The processing circuitry is configured to: detect, via the implantable sensor, an electrical signal of a patient that is generated in response to an electrical stimulation signal transmitted by the vestibular implant to one or more regions of vestibular organ of a patient; determine, based on the detected electrical signal, that the vestibular implant is transmitting the electrical stimulation signal at a first rate of change of an amplitude of the electrical stimulation signal; and based on a determination that the first rate of change satisfies a threshold condition, adjust one or more parameters of the electrical stimulation signal to cause the vestibular implant to transmit the electrical stimulation signal to the nerve at a second rate of change of the amplitude of the electrical stimulation signal.