Quadripolar Respiration Sensor Electrode Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ambulatory medical devices face challenges in accurately monitoring patient respiration, particularly in selecting the optimal electrode combinations for effective sensing, which is crucial for providing precise therapy and diagnosing conditions like cardiac arrhythmias.
Innovation Solution
The implementation of a respiration sensing circuit coupled with multiple electrodes, a signal processing circuit to extract respiration parameters, and a control circuit that determines signal performance metrics to automatically select the best electrode combination for monitoring respiration, optimizing signal quality and minimizing interference with cardiac signal sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple electrode combinations are used for respiration sensing, then signal quality and measurement accuracy are improved, but device complexity and sensing circuit requirements increase
Solution Approach 1:
The patent divides the respiration sensing function into multiple electrode combinations (first, second, third combinations) with different configurations. Each combination is optimized for specific sensing conditions, allowing the system to segment the sensing task across multiple specialized electrode sets rather than using a single general-purpose configuration.
Solution Approach 2:
The patent implements dynamic selection of electrode combinations based on real-time signal quality assessment. The system continuously evaluates signal metrics and switches between different electrode combinations to maintain optimal sensing performance, making the electrode configuration adaptive rather than static.
2Measurement precision
If signal processing circuits are added to determine performance metrics and select electrode combinations, then respiration monitoring accuracy is improved, but device complexity increases
Solution Approach 1:
The patent incorporates performance metric determination and electrode combination selection functions directly into the sensing circuit design. By integrating these control functions upfront in the circuit architecture rather than adding them as separate post-processing components, the system achieves intelligent electrode selection without proportionally increasing overall device complexity.
Solution Approach 2:
The sensing circuits are designed to perform multiple functions: they sense respiration signals, determine signal performance metrics, and control electrode combination selection. This multi-functionality reduces the need for separate dedicated circuits for each function, thereby limiting the increase in device complexity while maintaining advanced signal processing capabilities.
3Measurement precision
If quadripolar leads are used for respiration sensing, then signal-to-noise ratio is improved, but interference with cardiac signal sensing may increase
Solution Approach 1:
The patent applies different electrode combinations for different sensing purposes. Specific quadripolar configurations are used for respiration sensing when high signal-to-noise ratio is needed, while other electrode configurations are used for cardiac signal sensing. This local optimization allows each sensing function to use the most appropriate electrode arrangement without compromising the other.
Solution Approach 2:
The system continuously monitors signal quality and switches between electrode combinations based on detected signal characteristics. When cardiac signals are present and respiration sensing is required, the system can switch to electrode combinations that minimize cardiac interference. This feedback mechanism allows dynamic mitigation of harmful interference based on real-time conditions.
Data Source
AI summary
An apparatus comprises a respiration sensing circuit configured for coupling electrically to a plurality of electrodes and for sensing a respiration signal representative of respiration of a subject; a signal processing circuit electrically coupled to the respiration sensing circuit and configured to extract a respiration parameter from a sensed respiration signal and determine a signal performance metric for the sensed respiration signal using the respiration parameter; and a control circuit. The control circuit is configured to: initiate sensing of a plurality of respiration signals using different electrode combinations of the plurality of electrodes and determining of the signal performance metric for the sensed respiration signals; and enable an electrode combination from the plurality of electrodes and for use in monitoring respiration of the subject according to the signal performance metric.