Multi-Parameter Heart Failure Detection System
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Solution Overview
Problem
Current medical devices fail to provide early detection of worsening heart failure, often leading to late intervention and hospitalization, as they rely primarily on intrathoracic impedance measurements and do not effectively monitor changes in heart rate and respiration rate in relation to activity levels.
Innovation Solution
A medical system that includes sensors to monitor heart rate, respiration rate, and activity level, using a predetermined threshold zone to detect deviations from baseline values, issuing alerts for impending heart failure decompensation and potentially adjusting therapy to prevent hospitalization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If intrathoracic impedance measurement is used to detect heart failure, then fluid accumulation in the lungs can be detected, but early detection of worsening heart failure is not achieved
Solution Approach 1:
The patent segments the monitoring approach by dividing it into multiple independent parameter measurements: intrathoracic impedance, heart rate, respiration rate, and activity level. Each parameter is monitored separately and then integrated to provide comprehensive early detection of worsening heart failure, overcoming the limitation of using impedance alone.
Solution Approach 2:
The patent transitions from single-dimensional impedance monitoring to multi-dimensional monitoring by adding heart rate, respiration rate, and activity level parameters. This dimensional expansion enables earlier and more accurate detection of heart failure decompensation by capturing physiological changes across multiple domains simultaneously.
2Reliability
If only intrathoracic impedance is monitored, then device complexity is low, but detection accuracy for worsening heart failure is insufficient
Solution Approach 1:
The patent makes the monitoring system universal by having a single integrated device perform multiple functions: measuring intrathoracic impedance, detecting heart rate, monitoring respiration rate, and tracking activity level. This multi-functionality approach improves detection accuracy while consolidating complexity into one device rather than requiring multiple separate systems.
Solution Approach 2:
The patent merges previously separate monitoring functions (impedance monitoring, heart rate detection, respiration monitoring, activity tracking) into a single integrated system. By combining these functions, the patent achieves higher detection reliability through correlated analysis of multiple parameters while managing complexity through unified device architecture.
3Loss of time
If heart rate and respiration rate monitoring is added to detect worsening heart failure, then early detection capability is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service by having the monitoring device automatically collect, process, and analyze multiple physiological parameters without requiring external intervention. The device autonomously compares measured values against baseline thresholds and generates alerts, reducing the need for manual monitoring and minimizing operational complexity despite the increased sensor capabilities.
Solution Approach 2:
The patent incorporates feedback mechanisms where measured physiological parameters are continuously compared against baseline values and predetermined thresholds. The system provides feedback through alerts when decompensation is detected, enabling timely intervention. This automated feedback loop improves early detection while managing complexity through algorithmic processing rather than manual analysis.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables early detection and alerting of worsening heart failure, allowing for timely medical intervention and reducing the need for hospitalization by monitoring heart rate, respiration rate, and activity level deviations from established thresholds.
Implementation Method 1
sensors configured to output signals indicative of a heart rate
Implementation Method 2
monitoring intrathoracic impedance, which may provide a good indication of the level of pulmonary edema in patients
Implementation Method 3
An activity level of the patient can be obtained by a commonly used activity sensor (accelerometer)
Data Source
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AI summary
A medical system for monitoring a condition of a patient comprises sensors configured to output signals indicative of heart rate, respiration rate and activity level; a memory configured to store an indication of a predetermined threshold zone which is a function of heart rate, respiration rate and activity level. The medical system further comprises s diagnostic module configured to compare the monitored heart rate, respiration rate and activity level to the predetermined threshold zone, and determine the patient is experiencing worsening heart failure when the monitored heart rate, respiration rate and activity level are outside the predetermined threshold zone. The medical system further comprises an alert module configured to issue an alert to indicate that the patient is experiencing worsening heart failure after the diagnostic module determines the patient is experiencing worsening heart failure when the monitored signals are outside the threshold zone.