Dual-Sensor Blood Pressure Measurement Across Body Height Differences
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Solution Overview
Problem
Existing blood pressure measurement devices struggle to accurately measure blood pressure at different body regions, particularly when height differences are involved, leading to inaccuracies in hypertension diagnosis and management.
Innovation Solution
A blood pressure measurement system using biometric signals from two different body regions, incorporating a first sensor unit for detecting hemorheological parameters and a second sensor unit for detecting hemorheological parameters and arterial pressure, with a control unit calculating blood pressure values based on vascular resistivity and hemorheological parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If blood pressure is measured using conventional methods (Korotkoff sounds, oscillometric, or tonometric methods) at a single body region, then the measurement process is simple and quick, but the measurement accuracy decreases when height differences are involved between measurement and heart levels
Solution Approach 1:
The patent divides the blood pressure measurement system into two separate sensor units: a first sensor unit that detects hemorheological parameters and a second sensor unit that detects arterial pressure. This segmentation allows each sensor to specialize in detecting specific physiological parameters, improving overall measurement accuracy while compensating for height differences between measurement sites and the heart level
Solution Approach 2:
The patent introduces vascular resistivity as an intermediary parameter that connects hemorheological parameters from the first sensor unit with arterial pressure from the second sensor unit. By using vascular resistivity as a mediator, the system can calculate accurate blood pressure values even when measurements are taken at different body regions with height differences, without requiring direct mechanical connection between sensors
2Ease of operation
If blood pressure is measured at body regions with height differences from the heart level, then the measurement can be performed at convenient locations, but the blood pressure values become inaccurate due to hydrostatic pressure effects
Solution Approach 1:
The patent changes the measurement parameters by detecting hemorheological parameters (such as blood flow velocity, blood viscosity) in addition to arterial pressure. By measuring multiple parameters and using vascular resistivity as a connecting factor, the system can compensate for hydrostatic pressure effects and calculate accurate blood pressure values at convenient measurement locations regardless of height differences from the heart level
Data Source
AI summary
Disclosed are a blood pressure measurement system for calculating a blood pressure value by using biometric signals measured at two different regions and a blood pressure measurement method using the same. The blood pressure measurement system includes a first sensor unit for detecting a hemorheological parameter at one region of a body; a second sensor unit for detecting a hemorheological parameter and arterial pressure at another region of the body; and a control unit including a blood pressure calculation unit for calculating a blood pressure value of a region at which a first hemorheological parameter is detected, from the first hemorheological parameter detected by the first sensor unit and a second hemorheological parameter and the arterial pressure detected by the second sensor unit. The present invention relates to a blood pressure measurement system for measuring blood pressure by using a change in vascular resistivity and a blood pressure parameter, and more specifically, to a sphygmomanometer for calculating blood pressure by using vascular resistivity obtained by a hemorheological parameter detected at one region of a body and arterial pressure and a hemorheological parameter detected at another region of the body. Accordingly, it is possible to more accurately measure blood pressure of a desired blood pressure acquisition region on the basis of a hemorheological parameter variance and vascular resistivity and greatly enhance reliability of a sphygmomanometer.