System and method for determining vascular contractility using blood flow measurements - Patents.com

The system and method for determining ventricular contractility trends by measuring the effectiveness of the central and peripheral arterial compartments.

JP2025531304APending Publication Date: 2025-09-19カーティスガイピー
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Patent Information

Application Number
JP2025516244
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-01-28
Filing Date
2023-06-17
Publication Date
2025-09-19

AI Technical Summary

Technical Problem

Existing methods for monitoring ventricular contractility are not cost-effective, simple, or efficient in clinical settings, lacking a straightforward approach to utilize blood volume-flow waveforms for assessing heart muscle effectiveness.

Method used

A system and method using an oximeter to measure blood volume flow waveforms, specifically the modulation ratio of red and infrared light absorption rates, to determine ventricular contractility by analyzing dV/dt, distinguishing between central and peripheral arterial compartments.

Benefits of technology

Provides a cost-effective, easy-to-operate method for monitoring ventricular contractility trends by measuring dV/dt, leveraging the oximeter's ability to predictively indicate the effectiveness of the central and peripheral arterial compartments.

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Abstract

The present invention relates to a system and method for evaluating a patient's blood volume flow waveform for the purpose of determining ventricular contractility. Input data for the evaluation include a measured oxygen saturation level (SpO2) in the waveform and the duration of each cardiac cycle. Specifically, the oxygen saturation level SpO2 in the waveform indicates the arterial blood flow volume "V." A computer data processor is used to calculate the maximum rate of change of the arterial blood flow volume "V" per time, dV / dt. In accordance with the present invention, the maximum values ​​of dV / dt in successive cardiac cycles are compared to provide a clinical assessment of the patient's ventricular contractility trend.
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