Pulse Diagnosis Measurement With Adaptive Pulse-Holding Pressure
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Solution Overview
Problem
Existing pulse diagnosis devices face challenges in accurately measuring blood pressure waves due to the impact of tourniquet quality and the need for prolonged measurements that block arterial blood flow, affecting the accuracy of systolic and diastolic blood pressure readings.
Innovation Solution
A method and device that adjust the pressure of a pulse-holding device until the difference between maximum and minimum blood pressure wave values stabilizes, allowing for precise sensing of blood pressure waves and harmonics by matching the elasticity coefficient of the pulse-holding device to the pressure-strain modulus of the blood vessel, facilitating accurate measurement of specific harmonics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pressure of the tourniquet is increased to block blood flow for measurement, then blood pressure can be measured, but the arterial is affected and measurement accuracy is reduced
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the tourniquet pressure to different levels (including negative pressure) to optimize the measurement conditions. By changing the pressure parameter, the system can measure blood pressure waves without blocking arterial flow, thus improving measurement accuracy while avoiding arterial obstruction effects.
Solution Approach 2:
The patent inverts the conventional approach by using negative pressure (suction) instead of positive pressure to hold the pulse. This reversal allows the tourniquet to attract and stabilize the pulse without compressing and blocking the arterial blood flow, thereby resolving the contradiction between measurement stability and arterial obstruction.
2Stability of the object's composition
If the tourniquet pressure is increased to stabilize the pulse for measurement, then measurement stability improves, but the arterial blood flow is blocked affecting measurement accuracy
Solution Approach 1:
The patent uses negative pressure (suction) instead of positive pressure to stabilize the pulse. This inverted approach allows the tourniquet to attract and hold the pulse in a stable position without compressing the artery and blocking blood flow, thus achieving both pulse stability and measurement accuracy simultaneously.
Solution Approach 2:
The system dynamically adjusts the tourniquet pressure parameter, including using negative pressure values, to achieve optimal pulse stabilization. By changing the pressure parameter from conventional positive values to include negative values, the system stabilizes the pulse for accurate measurement without blocking arterial flow.
3Measurement precision
If conventional blood pressure measurement methods are used, then blood pressure can be obtained, but more time is needed and the arterial is affected
Solution Approach 1:
The patent changes the pressure measurement parameters to include negative pressure and optimized pressure levels, enabling direct measurement of blood pressure waves without the need for prolonged inflation and deflation cycles. This reduces measurement time while maintaining or improving measurement accuracy.
Solution Approach 2:
The patent replaces the conventional mechanical occlusion method (inflating tourniquet above systolic pressure to block flow) with a modified mechanical approach using lower or negative pressure that stabilizes the pulse without blocking flow. This substitution eliminates the need for prolonged measurement procedures while achieving accurate blood pressure wave measurement.
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
This approach reduces measurement time and minimizes arterial obstruction, enabling more accurate determination of blood pressure harmonics and supporting detailed physiological and pathological analysis.
Implementation Method 1
matching the elasticity coefficient of the pulse-holding device to the pressure-strain modulus of the blood vessel
Data Source
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AI summary
A method of pulse diagnosis measurement comprises applying a pressure to a pulse of an organism via a pulse-holding device; sensing a blood pressure wave of the organism via a sensing device, to generate a first pulse signal; computing a difference between a maximum value and a minimum value of each blood pressure wave of the first pulse signal; continuing adjusting the pressure of the pulse-holding device until the difference is not increased, at which time the pressure has a most suitable pressure value; and sensing the blood pressure wave according to the most suitable pressure value, to generate a second pulse signal.