Blood Pressure Measurement Device Segmentation Contradiction

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Solution Overview

Problem

Conventional electronic blood pressure measurement devices often inaccurately determine systolic and diastolic pressures due to misjudgment during the measurement process, especially in cases of atrial fibrillation, and fail to correctly capture pulse characteristic signals, leading to inaccurate blood pressure readings.

Innovation Solution

A blood pressure measurement device and method that involves a pressurizing motor unit, exhaust valve unit, and airbag system, where both pressurized and depressurized measurement data are collected, and maximum amplitude data from each phase are used to calculate accurate systolic and diastolic pressure values using threshold parameters, improving data extraction and accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If single pressurization oscillography is used to measure blood pressure, then the measurement process is simple and quick, but the measurement accuracy deteriorates due to misjudgment of systolic pressure leading to termination of measurement before correct value is captured

Engineering Contradiction:

Improvemeasurement speedVSAvoidblood pressure measurement accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The measurement process is divided into multiple independent measurement phases (first measurement value from pressurization, second measurement value from depressurization) instead of relying on a single measurement. This segmentation allows each phase to contribute independently to the final result, reducing the impact of misjudgment in any single phase and improving overall measurement accuracy while maintaining efficiency.

Inventive Principle:

Principle #1Segmentation

2Productivity

If single depressurization oscillography is used to measure blood pressure, then the measurement process is simple and quick, but the measurement accuracy deteriorates due to misjudgment of diastolic pressure leading to termination of measurement before correct value is captured

Engineering Contradiction:

Improvemeasurement speedVSAvoidblood pressure measurement accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements a compensatory mechanism by performing measurements in both pressurization and depressurization phases. The final blood pressure value is calculated by averaging the first measurement value (from pressurization) and the second measurement value (from depressurization). This beforehand cushioning approach ensures that if one phase produces an inaccurate result due to misjudgment, the other phase can compensate and the average will be more accurate.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Loss of time

If measurement is terminated upon detecting systolic pressure in pressurization phase, then measurement time is reduced, but reliability deteriorates because correct systolic blood pressure may not be captured due to misjudgment

Engineering Contradiction:

Improvemeasurement timeVSAvoidmeasurement reliability

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

4Loss of time

If measurement is terminated upon detecting diastolic pressure in depressurization phase, then measurement time is reduced, but reliability deteriorates because correct diastolic pressure may not be captured due to misjudgment

Engineering Contradiction:

Improvemeasurement timeVSAvoidmeasurement reliability

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentEP3744238B1Blood pressure measurement device and calculation method thereof

Publication Date: 2024.10.16 AVITA CORP

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AI summary

A blood pressure measurement device and a calculation method thereof are disclosed. The blood pressure measurement device includes a pressurizing motor unit and an exhaust valve unit in communication with an airbag unit. The blood pressure calculation method includes steps of controlling the pressurizing motor unit to pressurize the airbag unit; measuring pressurized measurement data from the airbag unit in a pressurization process; controlling the pressurizing motor unit to stop pressurizing the airbag unit, and controlling the exhaust valve unit to depressurize the airbag unit; measuring depressurized measurement data from the airbag unit in a depressurization process; extracting blood pressure parameters from the pressurized measurement data and the depressurized measurement data; calculating an average of the blood pressure parameters extracted from the pressurized measurement data and the depressurized measurement data, to obtain a blood pressure measurement result.