Compartmented Pressure Cuff Structure for Uniform Blood Pressure Sensing
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Solution Overview
Problem
Existing pressure measuring devices struggle with non-uniform pressure application and inaccurate determination of physiological parameters due to non-uniform fluid distribution and lack of a stable, kink-resistant structure, leading to unreliable measurements.
Innovation Solution
A pressure measuring device with a fluid bag having compartments separated by compartment walls with openings, a kinking-proof shell, and a pressure sensing device, ensuring uniform pressure application and accurate measurement of physiological parameters like blood pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fluid bag is used to apply pressure to the body part, then pressure application is simplified, but the pressure distribution becomes non-uniform causing measurement inaccuracies
Solution Approach 1:
The fluid bag is divided into multiple compartments separated by partition walls, each compartment containing a separate fluid volume. This segmentation allows independent control of pressure in different regions, enabling uniform pressure distribution across the body part while maintaining the simplicity of fluid-based pressure application.
2Adaptability or versatility
If a conventional flexible cuff is used, then the device can conform to the body part, but kinks and wrinkles form causing pressure application failures
Solution Approach 1:
The device employs a flexible shell structure that can conform to the body part's shape while incorporating rigid support elements and structured compartment walls that prevent kink formation. This combination maintains adaptability to different body geometries while ensuring reliable pressure transmission without deformation-induced failures.
3Adaptability or versatility
If the fluid bag is made highly flexible to conform to the body, then adaptability improves, but kinks and wrinkles increase causing measurement errors
Solution Approach 1:
The fluid bag structure combines flexible materials for conformability with rigid partition walls and support elements that prevent kink formation. This composite construction allows the outer surface to adapt to body contours while the internal structure maintains geometric stability, ensuring both adaptability and measurement precision.
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
The device achieves uniform pressure distribution and improved measurement accuracy by minimizing kinks and wrinkles, allowing for precise determination of physiological parameters such as blood pressure.
Implementation Method 1
a fluid bag which is fillable with fluid for applying the pressure to the body part
Implementation Method 2
a pressure sensing device configured to measure a pressure signal of the subject, wherein the measured pressure signal is indicative of blood pulsations
Data Source
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AI summary
The invention relates to a pressure measuring device configured to surround a subject's body part. It comprises a pressure application element with a fluid bag 88 configured to apply pressure to the body part, a pressure sensing device configured to measure a pressure signal of the body part, and a shell which is arranged to be located between the fluid bag and the body part. The fluid bag is fillable with fluid for applying the pressure to the body part and comprises compartments 89 which are separated by compartment walls 90 with an opening 91 such that the fluid can flow from compartment. This allows for a more uniform application of the pressure and correspondingly to a more accurate relation between applied pressure and measured pressure. This finally can lead to a more accurate determination of a physiological parameter like blood pressure.