Venous Pressure Measurement Using Pulse Wave Value Ranges
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Solution Overview
Problem
Existing venous pressure measurement technologies struggle to accurately determine venous pressure in cases where the pressure cannot be uniquely estimated from pulse wave information, leading to challenges in assessing body congestion, particularly in patients with heart failure.
Innovation Solution
A venous pressure measurement device and method that utilize a sensor to obtain pulse wave information and a processing unit to calculate a value range of venous pressure when the pressure is not estimatable, based on the obtained pulse wave information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If venous pressure measurement is performed using pulse wave information, then non-invasive monitoring of body congestion is enabled, but accurate determination becomes impossible when pressure cannot be uniquely estimated
Solution Approach 1:
When unique venous pressure estimation is not possible from pulse wave information, the system provides a value range (partial information) rather than attempting to provide a single exact value (excessive action). This resolves the contradiction by delivering useful clinical information within the limits of measurement capability, maintaining non-invasive operation while being honest about precision limitations.
2Productivity
If a single venous pressure value is required for clinical decision-making, then clear treatment guidance is provided, but reliable determination cannot be made when pulse wave information is insufficient
Solution Approach 1:
The system provides a value range (partial information) when unique determination is not possible, rather than providing a potentially unreliable single value. This maintains reliability by not overclaiming precision while still enabling clinical productivity through actionable information about body congestion state.
Solution Approach 2:
The system provides feedback about the reliability of the measurement by indicating when a value range is provided versus when a unique value is determined. This allows clinicians to adjust their decision-making process based on the confidence level of the measurement, maintaining both reliability and productivity.
3Duration of action of moving object
If venous pressure is measured continuously to monitor heart failure progression, then timely intervention is enabled, but measurement reliability decreases when unique estimation is not possible
Solution Approach 1:
During continuous monitoring, when unique venous pressure estimation is not possible, the system provides value ranges (partial information) rather than discarding measurements or providing unreliable single values. This maintains continuous monitoring capability while being transparent about reliability limitations at specific time points.
Data Source
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AI summary
A venous pressure measurement device includes: an obtaining unit configured to obtain pulse wave information on a pulse wave of a subject measured by a sensor; and a processing unit configured to calculate a value range of venous pressure of the subject based on the pulse wave information obtained by the obtaining unit when the venous pressure of the subject is not estimatable from the pulse wave information obtained by the obtaining unit.