Cardiovascular Pressure Annotation in Implantable Medical Devices
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Solution Overview
Problem
Current implantable medical devices (IMDs) face challenges in managing and interpreting the vast amount of data related to cardiovascular pressure, which is crucial for diagnosing conditions like congestive heart failure and acute myocardial ischemia, due to the complexity of integrating multiple sensor types and data sources.
Innovation Solution
A system comprising an external medical device configured to communicate with an IMD, which includes a communication circuit and display to receive and annotate cardiovascular pressure information, and an IMD with an implantable cardiovascular pressure sensor interface unit, cardiac signal sensing circuit, and trigger detector to store relevant data and event annotations, facilitating the monitoring and annotation of cardiovascular pressure-related events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensor types and data sources are integrated to monitor cardiovascular pressure, then measurement precision and diagnostic capability are improved, but device complexity and data management difficulty increase
Solution Approach 1:
The patent segments the complex cardiovascular monitoring system into distinct functional modules: pressure sensor interface unit, cardiac signal sensing circuit, trigger detector, and memory unit. Each module handles specific aspects of data acquisition and processing independently, reducing overall system complexity while maintaining comprehensive monitoring capability
Solution Approach 2:
The trigger detector acts as an intermediary component that receives both cardiovascular pressure sensor signals and cardiac electrical signals, processes them together to detect correlated events, and triggers selective data storage. This intermediary function simplifies data management by filtering and organizing data based on clinically relevant events rather than storing all raw data
2Reliability
If comprehensive cardiovascular pressure data is collected and stored, then diagnostic accuracy is improved, but loss of time in data interpretation and management increases
Solution Approach 1:
The system performs preliminary action by continuously monitoring cardiovascular pressure and cardiac signals, pre-identifying clinically significant events through the trigger detector, and pre-storing relevant data segments in memory before clinical review. This preliminary processing reduces the time required for later data interpretation by organizing information in advance
Solution Approach 2:
The trigger detector extracts and isolates only the most clinically relevant cardiovascular events from the continuous stream of pressure data, such as events correlated with cardiac arrhythmias or hemodynamic abnormalities. This extraction process removes irrelevant data, reducing the time caregivers need to spend interpreting comprehensive datasets
Data Source
AI summary
A system comprises an external medical device configured to communicate with a first implantable medical device (IMD). The external medical device includes a communication circuit and a display. The communication circuit is configured to receive information associated with cardiovascular pressure from the IMD. The external medical device is configured to annotate a waveform on the display to indicate one or more events associated with cardiovascular pressure.