Beat-by-Beat Blood Pressure Reliability Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blood pressure measurement systems struggle with reliability due to disturbances such as outliers, body motion, and attachment state changes, which affect the accuracy of time-series data analysis.
Innovation Solution
A blood pressure value analysis support apparatus that includes a one-beat reliability determination unit to assess the reliability of each blood pressure measurement based on disturbance information, and a section setting unit to differentiate valid and invalid sections in the time-series data, converting short invalid periods to valid sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous blood pressure measurement is performed for each beat, then more detailed blood pressure data is obtained, but reliability of the data decreases due to disturbances such as body motion and attachment state changes
Solution Approach 1:
The patent divides the continuous time-series blood pressure data into discrete beats (individual heartbeats) and further segments them into valid and invalid portions based on reliability assessment. This segmentation allows the system to treat each beat independently, assessing its reliability separately and excluding only the unreliable portions from analysis, thereby maintaining measurement detail while improving overall data reliability.
Solution Approach 2:
The patent applies local quality assessment by evaluating the reliability of each individual beat rather than treating the entire time-series data uniformly. The section setting unit identifies specific time periods within the data that have high reliability (valid sections) and excludes periods with low reliability (invalid sections), allowing the analysis to focus on high-quality data segments while preserving the detailed beat-by-beat measurement information where available.
2Measurement precision
If unreliable data segments are excluded from analysis, then analysis accuracy is improved, but the amount of usable data decreases
Solution Approach 1:
The patent applies partial action by excluding only the specific invalid portions of the data (short continuous periods with reliability below the threshold) rather than discarding entire measurement sessions or large chunks of data. This selective exclusion removes only the necessary amount of unreliable data while preserving the maximum possible volume of usable blood pressure measurements for analysis.
3Quantity of substance
If short invalid periods are converted to valid sections, then the amount of usable data is increased, but strict reliability filtering is weakened
Solution Approach 1:
The patent applies parameter changes by modifying the reliability status of short continuous invalid periods based on their duration. When an invalid period's continuous duration is shorter than the predetermined threshold, the system changes its parameter from invalid to valid, effectively adjusting the data quality classification based on the temporal characteristics of the disturbance rather than applying a fixed strict threshold to all cases.
Data Source
AI summary
A blood pressure value analysis support apparatus includes a one-beat reliability determination unit and section setting unit. The determination unit determines reliability of a blood pressure value for each beat including a first reliability and second reliability lower in reliability than the first based on information indicating disturbance. The section setting unit sets valid and invalid sections for the time-series data of blood pressure based on a reliability determination result. The section setting unit includes a section wherein the blood pressure value reliability for each beat is the first reliability in the valid section and includes a section wherein the blood pressure value reliability for each beat is the second reliability in the invalid section, for the time-series data of blood pressure. The section setting unit changes the invalid section when a length of a continuous period is less than a preset first threshold value to the valid section.