Adhesive Patch for Continuous Blood Pressure Monitoring
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Solution Overview
Problem
Existing methods for continuous, non-invasive blood pressure monitoring are often cumbersome, uncomfortable, and prone to inaccuracies due to factors like incorrect cuff placement, movement sensitivity, and external influences.
Innovation Solution
A wearable adhesive patch that applies external pressure to a target part of the circulatory system using an actuator and measures resulting pressure oscillations with a pressure sensor to obtain accurate oscillatory blood pressure measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cuff-based oscillometric methods are used, then blood pressure measurements can be obtained, but the device is bulky and uncomfortable for continuous use
Solution Approach 1:
The patent divides the traditional bulky cuff-based system into a small adhesive patch that can be applied directly to the skin over the target artery. This segmentation allows the measurement function to be separated from the large cuff structure, enabling continuous wear and comfortable use while maintaining oscillometric measurement capability through the patch's integrated actuator and pressure sensor
Solution Approach 2:
The invention extracts the essential measurement components (actuator and pressure sensor) from the traditional cuff system and integrates them into a minimal adhesive patch format. This extraction removes the unnecessary bulk of the traditional cuff while preserving the core oscillometric measurement function, allowing continuous monitoring without discomfort
2Measurement precision
If traditional cuff-based oscillometric methods are used, then blood pressure measurements can be obtained, but incorrect positioning leads to significant errors
Solution Approach 1:
The patent incorporates feedback mechanisms that provide real-time information about patch positioning quality. The system monitors the oscillation signal quality and provides feedback to the user (through visual, auditory, or haptic signals) indicating whether the patch is correctly positioned over the target artery, allowing immediate correction of positioning errors and ensuring measurement accuracy
3Measurement precision
If traditional auscultatory method is used, then accurate blood pressure measurements can be obtained, but it requires skill to identify Korotkoff sounds making it subjective and time-consuming
Solution Approach 1:
The patent replaces the manual auscultatory method (requiring stethoscope and skilled interpretation of Korotkoff sounds) with an automated oscillometric system using an actuator and pressure sensor. This mechanical substitution eliminates the need for skilled operators to listen and interpret sounds, as the electronic sensor automatically detects and processes the oscillations, providing objective and rapid measurements without time loss
4Measurement precision
If oscillometric devices are used, then blood pressure measurements can be obtained, but they are sensitive to movement causing inaccuracies
Solution Approach 1:
The patent applies preliminary action by pre-positioning the adhesive patch securely on the skin over the target artery before measurement begins. The patch's adhesive nature ensures firm attachment that minimizes movement artifacts during the measurement process, and the system can perform preliminary positioning verification to ensure the patch is correctly placed and secured before taking readings
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 adhesive patch provides accurate, continuous, and comfortable blood pressure measurements, reducing user error and overcoming the limitations of traditional cuff-based methods.
Implementation Method 1
the pressure sensor is adapted to measure the external pressure; wherein the patch is arranged to obtain oscillatory blood pressure measurements of the target part by setting the external pressure applied to the target part above a systolic blood pressure, and thereafter gradually releasing the external pressure until it is below a diastolic blood pressure, while measuring, by the pressure sensor, resulting pressure oscillations of the actuator
Data Source
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AI summary
The invention regards an adhesive patch for oscillatory blood pressure measurements of a subject, the patch comprising: an actuator arranged for application of an external pressure onto a target part of the circulatory system of the subject; a pressure sensor arranged in connection with the actuator, wherein the pressure sensor is adapted to measure the external pressure; wherein the patch is arranged to obtain oscillatory blood pressure measurements of the target part by setting the external pressure applied to the target part above a systolic blood pressure, and thereafter gradually releasing the external pressure until it is below a diastolic blood pressure, while measuring, by the pressure sensor, resulting pressure oscillations of the actuator.