Blood Pressure Cuff Wrinkle Guides for Measurement Accuracy

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Solution Overview

Problem

Blood pressure measurement devices face inaccuracies and variations due to wrinkling in the cuff, which affects the measurement results, especially when the cuff is inflated around different body shapes and sizes.

Innovation Solution

The device incorporates a bag-like pressing cuff and a sensing cuff with guides on the outer surface, forming wrinkles in a direction perpendicular to the winding direction, allowing for controlled wrinkle positions and depths, thereby maintaining consistent pressure and improving measurement accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the cuff is inflated around the living body, then the blood pressure measurement can be performed, but wrinkles are formed in the cuff causing measurement inaccuracies

Engineering Contradiction:

Improveblood pressure measurement accuracyVSAvoidcuff surface smoothness

Core Design Contradiction:

Measurement precisionVSShape

Solution Approach 1:

The patent applies preliminary action by pre-forming wrinkles in the cuff material before inflation using guide structures. These guides create controlled wrinkles in advance that prevent uncontrolled wrinkle formation during inflation, thereby maintaining measurement accuracy while allowing the cuff to conform to the body shape.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If the cuff is made to fit different body shapes, then the adaptability is improved, but wrinkle formation varies causing measurement variations

Engineering Contradiction:

Improvecuff fit for different body shapesVSAvoidmeasurement result consistency

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent applies local quality by providing guides at specific locations on the cuff where wrinkles are most likely to form. These guides have specific patterns and densities tailored to local requirements, creating controlled wrinkles only where needed while maintaining smooth surfaces in other areas, thus ensuring consistent measurements across different body shapes.

Inventive Principle:

Principle #3Local quality

3Shape

If the cuff material is stretched to reduce wrinkles, then the wrinkle formation is suppressed, but the comfort and blood flow may be affected

Engineering Contradiction:

Improvecuff surface smoothnessVSAvoidblood flow restriction and comfort

Core Design Contradiction:

ShapeVSObject-affected harmful factors

Solution Approach 1:

The patent applies segmentation by dividing the cuff surface into multiple zones with different guide patterns. This allows the cuff to have controlled wrinkles in specific segments while maintaining smoothness in other segments, reducing the overall need for material stretching and thereby maintaining better blood flow and comfort.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11925444B2Blood pressure measurement device

Publication Date: 2024.03.12 OMRON CORP

AI summary

A blood pressure measurement device includes a bag-like pressing cuff wound around a measurement target site of a living body; a back plate arranged on the living body side of the pressing cuff; a bag-like sensing cuff arranged on the living body side of the back plate; a supply device configured to supply a fluid into the cuffs; first guides arranged on the living body side of the pressing cuff and configured to form wrinkles in a direction intersecting the winding direction; and second guides arranged on the living body side of the sensing cuff and configured to form wrinkles in the direction intersecting the winding direction.