Cardiovascular Pressure Verification via Electrical Timing Comparison

Solution Overview

Problem

Existing implantable medical devices face challenges in reliably monitoring cardiovascular pressure metrics due to interference from factors like respiration and motion, which can lead to inaccurate readings and increased power consumption when comparing raw cardiovascular pressure signals with electrical depolarization signals.

Innovation Solution

The implementation of techniques that compare cardiovascular pressure metrics, such as cardiac pulse intervals, with corresponding cardiac electrical metrics, like depolarization intervals, to verify the reliability of pressure metrics and discard unreliable data, thereby reducing the need for continuous signal comparison and conserving power.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If continuous comparison of raw cardiovascular pressure signal with electrical depolarization signal is performed to verify reliability, then measurement precision is improved, but use of energy increases

Engineering Contradiction:

Improvereliability of pressure metricsVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The system performs preliminary processing of the pressure signal to extract key metrics (pulse rate, pulse pressure, mean pressure) before comparison with electrical metrics. This preliminary extraction reduces the amount of data that needs to be transmitted and processed continuously, thereby reducing power consumption while maintaining verification capability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention extracts only the essential verification information (timing metrics and pressure metrics) from the continuous signals for comparison purposes. By taking out only the necessary data points rather than processing the entire raw signal continuously, the system achieves reliable verification with reduced energy consumption

Inventive Principle:

Principle #2Taking out (Extraction)

2Measurement precision

If continuous monitoring of cardiovascular pressure is performed to ensure accuracy, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improveaccuracy of pressure readingsVSAvoidsignal processing complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The pressure signal processing is segmented into distinct functional components: pulse detection, timing measurement, pressure measurement, and verification comparison. Each component processes a specific aspect of the signal independently, making the overall system more manageable and less complex while maintaining comprehensive monitoring capability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system uses feedback from the verification comparison to determine whether to accept or reject pressure metrics. By comparing extracted pressure metrics with electrical metrics and using this feedback to validate reliability, the system achieves accurate monitoring without requiring complex continuous processing of all signal data

Inventive Principle:

Principle #23Feedback

3Measurement precision

If verification of pressure metrics is performed to improve reliability, then measurement precision is improved, but loss of time increases

Engineering Contradiction:

Improvereliability of metricsVSAvoidtime for signal comparison

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system performs preliminary extraction of timing metrics and pressure metrics from the continuous signals before the verification comparison is made. This preliminary processing allows the verification to be performed more efficiently with less time required, as the data is already prepared in the necessary format for direct comparison

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention performs partial verification by comparing only the most critical metrics (pulse rate and timing information) rather than all possible parameters. This partial verification approach provides sufficient reliability assurance with minimal time investment, avoiding excessive processing time while maintaining adequate verification

Inventive Principle:

Principle #16Partial or excessive action

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

This approach enhances the reliability of cardiovascular pressure monitoring, reduces power consumption, and allows for more accurate delivery of therapy or diagnostic information based on verified pressure metrics.