System and Method for Noninvasively Measuring Ventricular Stroke Volume and Cardiac Output

摘要

A system for non-invasively measuring cardiac output, stroke volume, or both comprises a pulse oximeter, a data processor, and means for generating an output reporting measured one or more CO or SV values to a user. A method for non-invasively measuring cardiac output, stroke volume, or both comprises collecting plethysmographic waveform data of a patient, providing the plethysmographic waveform to a data processor, and calculating measured values for CO or SV. The data processor comprises a mathematical model of the cardiovascular system integrated in a dynamic state space model (DSSM).

主权项

1. A system for non-invasively measuring left ventricular stroke volume (SV) and/or cardiac output (CO) of a patient, said system comprising:
a pulse oximeter, a data processor, and means for generating an output reporting a measured SV or CO value to a user wherein: the pulse oximeter is configured to collect plethysmographic waveform data of the patient and to transmit the plethysmographic waveform data to the data processor; the data processor is configured to receive said plethysmographic waveform data and comprises software that calculates the measured value for SV and/or CO using said plethysmographic waveform data and reports the measured value for SV and/or CO to the user; and the software that calculates a measured value for SV and/or CO from plethysmographic waveform data comprises a probabilistic processor and a mathematical model of a cardiovascular system integrated in a dynamic state space model (DSSM).