Single Cuff Venous Pressure Measurement via Statistical Vibration Analysis
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Solution Overview
Problem
Existing venous pressure measurement apparatuses require multiple cuffs or sensors to accurately estimate venous pressure, which can be cumbersome and less accurate.
Innovation Solution
A venous pressure measurement apparatus using a single cuff with a pressure controller, detector, and processor that stepwisely changes the cuff's internal pressure to estimate venous pressure based on statistical values or index values related to pressure vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple cuffs or sensors are used to measure venous pressure, then measurement accuracy is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent combines the functions of multiple cuffs into a single cuff system. The single cuff is equipped with multiple pressure detection points that simultaneously detect pressure vibrations at different locations, merging what would traditionally require multiple separate cuffs into one integrated device while maintaining measurement accuracy
Solution Approach 2:
The single cuff is designed to perform multiple measurement functions simultaneously. It can detect both arterial pressure pulse waves and venous pressure pulse waves through different pressure detection points, making the single device universal enough to replace multiple specialized sensors
2Measurement precision
If multiple cuffs or sensors are used to measure venous pressure, then measurement accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
By merging multiple cuff functions into one, the patent reduces the number of application steps for the user. Instead of applying and positioning multiple separate cuffs on different body parts, the user only needs to apply one cuff, significantly improving ease of operation while the internal multiple detection points maintain high measurement accuracy
3Device complexity
If a single cuff is used to measure venous pressure, then device complexity and ease of operation are improved, but measurement precision deteriorates
Solution Approach 1:
The single cuff is segmented into multiple functional zones with separate pressure detection points. Each detection point is positioned to capture specific pressure vibration characteristics, and the processor analyzes vibrations from multiple segments to accurately distinguish venous pressure signals from arterial signals, maintaining precision despite using only one cuff
Solution Approach 2:
The patent adds spatial dimensionality to the single cuff by incorporating multiple pressure detection points at different locations and orientations within the cuff structure. This multi-dimensional pressure detection capability allows the single cuff to extract venous pressure information that would traditionally require multiple separate sensors
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
Enables accurate estimation of venous pressure using a single cuff, suppressing noise influence and improving accuracy by analyzing changes in statistical values or index values due to cuff pressure changes.
Implementation Method 1
a pressure detector that detects the internal pressure of the cuff... acquires a statistical value relating to a distribution of amplitudes of a plurality of pressure changes corresponding to pressure vibration that occurs in the cuff
Data Source
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Figure 3A~3B
AI summary
A venous pressure measurement apparatus includes: a pressure controller that causes an internal pressure of a cuff to be attached to a subject, to change; a pressure detector that detects the internal pressure of the cuff; and a processor that causes the pressure controller to change the internal pressure of the cuff, acquires a statistical value relating to a distribution of amplitudes of a plurality of pressure changes corresponding to pressure vibration that occurs in the cuff, and that is detected by the pressure detector, and estimates a venous pressure of the subject based on a change of the statistical value due to the change of the internal pressure of the cuff.