Nerve Stimulation Apparatus Heart Rate Control
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Solution Overview
Problem
Existing nerve stimulation techniques for cardiac patients often result in undesired heart stimulation due to leakage during cardiac refractory periods, which can adversely affect the heart, and fail to effectively adjust stimulation intensity based on varying heart rates.
Innovation Solution
A nerve stimulation apparatus with a cardiac-event detector and controller that outputs nerve stimulation signals with adjustable intensity based on detected heart rate during cardiac refractory periods, using electrodes to stimulate the vagus nerve and prevent adverse effects on the heart.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nerve stimulation is performed during cardiac refractory period, then therapeutic effect on cardiac remodeling is improved, but undesired stimulation of the heart may occur
Solution Approach 1:
The stimulation intensity is dynamically adjusted based on the detected heart rate. The controller modifies the intensity parameter of the nerve stimulation signal in real-time according to the patient's current heart rate, ensuring therapeutic effectiveness while adapting to changing cardiac conditions to prevent adverse effects.
Solution Approach 2:
The patent changes the stimulation intensity parameter according to heart rate variations. By establishing a relationship between heart rate and appropriate stimulation intensity, the system optimizes the therapeutic effect while minimizing the risk of undesired cardiac stimulation during the refractory period.
2Device complexity
If fixed intensity nerve stimulation is used, then device simplicity is maintained, but effectiveness varies with heart rate changes
Solution Approach 1:
The system employs a feedback mechanism where the heart rate is continuously detected and used to adjust the stimulation intensity. The controller receives heart rate information from the cardiac event detector and automatically modifies the stimulation parameters, creating a closed-loop control system that adapts to physiological changes.
Solution Approach 2:
The apparatus performs self-adjustment of stimulation intensity based on its own detection of heart rate. The system uses its built-in cardiac event detector to monitor heart rate and automatically modifies its stimulation output without requiring external intervention, enabling the device to optimize its own performance.
Data Source
AI summary
Provided is a nerve stimulation apparatus that is capable of performing effective nerve stimulation depending on a therapeutic purpose without adversely affecting a heart. Further provided is a nerve stimulation apparatus including: a stimulation-pulse output unit that outputs a stimulation pulse; a cardiac-event detector that detects a cardiac event; and a controller that controls the stimulation-signal output unit so as to output, during a cardiac refractory period, the nerve stimulation signal having an intensity that corresponds to the heart rate obtained on the basis of the cardiac event detected by the cardiac-event detector.