Continuous Baroreflex Sensitivity Measurement via Respiration Cycles
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Solution Overview
Problem
Current methods for measuring baroreflex sensitivity (BRS) in patients with heart failure provide only snapshot data, making it difficult to monitor changes over time and compare results effectively, which hinders timely intervention in worsening heart failure conditions.
Innovation Solution
An implantable medical device (IMD) system that continuously monitors and calculates BRS by tracking changes in RR interval and systolic blood pressure during respiration cycles, using pressure sensors and EGM signals to provide continuous, real-time BRS measurements, allowing for trend analysis and threshold comparison.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional BRS measurement methods (bolus injection, Valsalva maneuver, neck chamber) are used, then BRS can be measured, but only snapshot data is obtained and cannot be continuously monitored over time
Solution Approach 1:
The patent applies continuous BRS measurement by continuously monitoring blood pressure and heart rate during respiration cycles, eliminating the need for intermittent manual testing. The system continuously calculates BRS values throughout the day, providing ongoing monitoring rather than isolated snapshot measurements.
Solution Approach 2:
The system uses the patient's own respiration cycles to stimulate and measure BRS automatically, without requiring external manual stimulation procedures. The device self-regulates the measurement process by detecting respiratory variations and calculating BRS values continuously.
2Measurement precision
If traditional BRS measurement methods are used, then BRS can be measured, but results must be compared against other patients' test results which limits timely intervention
Solution Approach 1:
The system provides continuous feedback by monitoring BRS values in real-time and comparing them against the patient's own baseline and predefined thresholds. This allows immediate detection of deterioration and triggers timely alerts to healthcare providers, eliminating the delay inherent in comparing snapshot results across different patients.
Solution Approach 2:
The system establishes baseline BRS values and monitoring thresholds during initial calibration, enabling early detection of changes before they become clinically significant. Continuous monitoring allows preliminary detection of deterioration trends that can trigger proactive intervention.
3Adaptability or versatility
If HRV is used to monitor heart changes, then heart function can be assessed, but it only deals with RR interval as a single variable without capturing feedback system relationships
Solution Approach 1:
The system integrates multiple measurement approaches by simultaneously monitoring blood pressure, heart rate, and respiration patterns, then combining these data to calculate BRS. This multi-parameter approach provides both the versatility of comprehensive heart function monitoring and the precision of feedback system analysis.
Data Source
AI summary
A medical device and method for determining baroreflex sensitivity (BRS) based on one or more respiration cycles. The BRS determination may be performed continuously based on measurements of heart rate, blood pressure, and respiration cycles.