Electrical Therapy Impedance Monitoring for Fault Detection
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Solution Overview
Problem
Existing neurological stimulation systems face issues with changing impedance due to factors like scar tissue formation, lead movement, or disconnection, leading to reduced efficacy and patient discomfort, with delayed awareness of faults in systems that do not produce paresthesia.
Innovation Solution
The system autonomously detects impedance changes in the electrical therapy circuit and adjusts parameters without human intervention, including predicting future impedance values and providing notifications to ensure continuous and comfortable therapy delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system applies electrical signals to electrodes without impedance monitoring, then the therapy can be delivered continuously, but the efficacy reduces and patient discomfort increases over time due to impedance changes from scar tissue formation and lead movement
Solution Approach 1:
The system continuously monitors impedance of the electrical circuit and uses this feedback to detect faults such as lead disconnection or scar tissue formation. The impedance monitoring provides real-time information about circuit conditions, enabling the system to respond to changes in patient anatomy or lead position, thereby maintaining therapy efficacy and enabling timely fault detection.
Solution Approach 2:
The system performs self-diagnosis by automatically monitoring its own circuit impedance without requiring external intervention. The neurostimulator independently detects faults through impedance changes, allowing it to identify problems such as lead disconnection or electrode migration on its own, ensuring continuous reliable operation.
2Reliability
If the system autonomously adjusts therapy parameters based on impedance changes, then continuous effective therapy is maintained, but the system complexity increases
Solution Approach 1:
The neurostimulator autonomously adjusts therapy parameters by monitoring its own circuit impedance and automatically modifying stimulation settings in response to detected changes. This self-adjusting capability maintains continuous effective therapy without requiring manual intervention or complex external monitoring systems.
Solution Approach 2:
The system uses impedance feedback to automatically adjust therapy parameters. By continuously monitoring circuit impedance and using this information to modulate stimulation delivery, the system maintains optimal therapy effectiveness while implementing automation through a relatively simple feedback loop rather than complex control algorithms.
Data Source
AI summary
System and methods for detecting impedance changes and for adjusting electrical therapy based on impedance changes are disclosed herein. A method in accordance with a particular embodiment includes applying a therapeutic, paresthesia-less electrical signal to a patient via a patient modulation system that includes a signal delivery device in electrical communication with a target neural population of the patient. The method can include monitoring on a periodic basis an impedance of an electrical circuit that includes the signal delivery device. The method can further include detecting a change in the impedance that indicates a fault and providing an indication that the fault exists.