Medical Device Therapy Control During Start-up and Operation
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Solution Overview
Problem
Existing implantable medical devices for treating nervous system disorders face challenges in controlling treatment therapy during start-up and operation, leading to potential overdelivery and discomfort due to high false positive detections and the risk of infinite loops, which can reduce treatment efficacy and patient comfort.
Innovation Solution
A medical device system that includes therapy delivery elements, monitoring elements, and a processor to prevent therapy delivery for a predetermined time after activation and limits therapy parameters to ensure they remain within acceptable ranges, preventing excessive stimulation and false predictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If closed-loop feedback control is used to deliver treatment therapy, then treatment efficacy is improved, but false positive detections increase during algorithm stabilization
Solution Approach 1:
The system performs preliminary stabilization of the detection algorithm before enabling full treatment therapy delivery. During an initial period after implantation, the algorithm monitors neurological signals without actively treating, allowing it to adapt to the patient's baseline brain activity patterns. This preliminary action reduces false positive detections while maintaining the capability for effective treatment once stabilization is achieved.
2Reliability
If treatment therapy is delivered continuously, then seizure protection is improved, but patient comfort deteriorates due to excessive stimulation
Solution Approach 1:
The system employs closed-loop feedback control where detection of neurological events triggers treatment therapy delivery, and subsequent monitoring determines when therapy should be discontinued. The feedback mechanism adjusts treatment parameters based on real-time detection of seizure activity, ensuring therapy is delivered only when necessary rather than continuously, thereby maintaining seizure protection while minimizing patient discomfort from excessive stimulation.
3Reliability
If therapy parameters are increased to ensure adequate treatment, then treatment coverage is improved, but risk of overdelivery increases
Solution Approach 1:
The system dynamically adjusts therapy parameters based on detected neurological event characteristics and patient response. Rather than using fixed high-intensity parameters, the system adapts stimulation intensity, duration, and frequency in real-time based on the severity and type of detected events, ensuring adequate treatment coverage while minimizing the risk of overdelivery and associated harmful effects.
Data Source
AI summary
A method and medical device system for controlling treatment therapy delivered to treat a nervous system disorder. During start-up, the medical device system prevents the therapy device from delivering therapy to the patient for a predetermined time period after the therapy device has been activated. During operation, before the therapy device is programmed, the system performs a check on the programming information to ensure that the programming information will result in treatment therapy being within of an acceptable range of one or more therapy parameters.