Wrist Blood Pressure Cuff With Pressing Layer For Even Adhesion

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Solution Overview

Problem

Blood pressure measurement devices face challenges in accurately measuring blood pressure due to the uneven shape of the wrist, caused by tendons, bones, and muscles, which affects the even distribution of air in the cuff, leading to measurement inaccuracies.

Innovation Solution

A cuff structure with a sensing cuff and a pressing cuff, where the pressing cuff is inflated to press against the wrist, reducing unevenness and ensuring the sensing cuff is evenly adhered to the artery location, using a wall portion along the cuff's edge to stabilize and uniformly distribute air.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a sensing cuff is used to measure blood pressure on the wrist, then blood pressure can be measured, but the uneven shape of the wrist (caused by tendons, bones, and muscles) causes uneven air distribution in the cuff, leading to measurement inaccuracy

Engineering Contradiction:

Improveblood pressure measurement accuracyVSAvoidair distribution uniformity in cuff

Core Design Contradiction:

Measurement precisionVSStability of the object's composition

Solution Approach 1:

The pressing cuff is inflated before the sensing cuff to pre-compress the wrist and eliminate unevenness caused by tendons, bones, and muscles. This preliminary action ensures that when the sensing cuff is subsequently inflated, the air can be uniformly distributed throughout the cuff, resolving the measurement accuracy issue.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The cuff system is divided into two functional segments: a pressing cuff for initial compression and unevenness elimination, and a sensing cuff for blood pressure measurement. This segmentation allows each component to perform its specific function optimally, with the pressing cuff preparing the wrist surface and the sensing cuff conducting the actual measurement.

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If the sensing cuff is inflated to measure blood pressure, then the artery can be compressed for measurement, but the sensing cuff may collapse due to wrist unevenness, causing non-uniform air distribution

Engineering Contradiction:

Improveblood pressure detection accuracyVSAvoidsensing cuff structural integrity

Core Design Contradiction:

Measurement precisionVSStrength

Solution Approach 1:

The pressing cuff is inflated first to pre-compress the wrist and establish a stable, even surface. This preliminary compression prevents the sensing cuff from collapsing when it is subsequently inflated, as the wrist has already been shaped into a uniform contour that supports the sensing cuff's structural integrity.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If the cuff is designed to wrap around the wrist, then it can accommodate the wrist shape, but the natural unevenness of the wrist (tendons, bones, muscles) prevents even air distribution and accurate measurement

Engineering Contradiction:

Improvecuff adaptability to wrist shapeVSAvoidblood pressure measurement accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The pressing cuff performs a preliminary compression action that temporarily overcomes the wrist's natural unevenness. By inflating the pressing cuff first, the system creates a uniform surface that allows the sensing cuff to distribute air evenly, thereby maintaining measurement precision despite the wrist's inherent irregularities.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The cuff system is segmented into a pressing cuff and a sensing cuff, allowing the pressing cuff to handle the adaptation to wrist shape while the sensing cuff focuses on accurate measurement. This segmentation separates the functions of adaptability and measurement precision.

Inventive Principle:

Principle #1Segmentation

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 configuration improves the accuracy of blood pressure measurement by ensuring the sensing cuff is suitably adhered to the artery area, preventing collapse and ensuring uniform air distribution, thus enhancing measurement precision.

Implementation Method 1

the pressing cuff configured to press the sensing cuff against the wrist by being inflated

Methodology Applied

Scientific EffectPressure: Pressure Increase

Implementation Method 2

The sensing cuff and the pressing cuff are inflated by being fed with the fluid

Methodology Applied

Scientific EffectGas expansion: Pressure Increase

Data Source

PatentUS20230000373A1Cuff structure and blood pressure measurement device

Publication Date: 2023.01.05 OMRON HEALTHCARE CO LTD

AI summary

To provide a cuff structure capable of improving measurement accuracy of blood pressure, and a blood pressure measurement device. A cuff structure includes a sensing cuff configured in shape that is long in one direction and coming into contact with a region of a wrist where an artery is present, a pressing cuff configured in a shape that is long in one direction, provided on a side of the sensing cuff opposite from the wrist side surface, and pressing the sensing cuff against the wrist by being inflated, and a wall portion provided along at least one edge portion along a longitudinal direction of the sensing cuff and having a leading end surface on the wrist side coming into contact with the wrist.