Respiratory Phase Detection Using Signal Alignment
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Solution Overview
Problem
Current systems for determining patient respiratory phase using indirect physiologic signals face challenges in accurately aligning and combining these signals with direct airflow measurements, leading to potential discrepancies in inspiration and expiration phase detection, which affects the accuracy of respiratory parameters and overall patient monitoring.
Innovation Solution
The system employs a signal receiver circuit to gather first and second physiologic information, with an assessment circuit that determines the composite respiratory phase by aligning and combining these signals using phase correction factors, potentially involving phase lock loop circuits, to improve the accuracy of respiratory phase detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If indirect physiologic signals are used to determine respiratory phase, then device complexity is reduced and ease of operation is improved, but measurement precision deteriorates due to misalignment between indirect signals and direct airflow measurements
Solution Approach 1:
The system uses feedback by continuously comparing the phase of indirect physiologic signals with direct airflow measurements and applying real-time phase correction factors to align them, thereby maintaining measurement precision while using simpler indirect sensing methods
Solution Approach 2:
The system changes the parameter of phase alignment by dynamically adjusting phase correction factors based on the relationship between indirect signals and direct airflow measurements, resolving the precision issue without increasing operational complexity
2Measurement precision
If phase correction factors are applied to align indirect signals with direct airflow measurements, then measurement precision is improved, but device complexity increases due to additional signal processing requirements
Solution Approach 1:
The system performs preliminary action by pre-calculating and storing phase correction factors during calibration phases, so that during actual operation, only simple lookup and application of these factors is needed, maintaining precision without adding operational complexity
Solution Approach 2:
The phase correction factor acts as an intermediary element that mediates between indirect physiologic signals and direct airflow measurements, enabling precise alignment through a simple computational layer rather than complex hardware modifications
Data Source
AI summary
Systems and methods to determine a composite respiration phase of a patient are disclosed, including a signal receiver circuit to receive first and second physiologic information of a patient, and an assessment circuit to determine first respiration phase information of the first physiologic information and to determine the composite respiration phase of the patient using the determined first respiration phase information and the second physiologic information.