Patent ID: 9364158
Filing Date: 2016-06-14
CPC Classification: A61B,G16H

Claim Text:
1. A method for determining stroke volume from a patient using a body-worn device, the method comprising: measuring an electrocardiogram (ECG waveform from a first portion on the patient's body with an ECG module comprising: i) at least two electrodes; and ii) an ECG circuit configured to process signals from the at least two ECG electrodes to generate the ECG waveform; measuring a trans-brachial electro-velocimetry (TBEV) waveform from a second portion on the patient's body with an impedance module comprising: i) at least two impedance electrodes; and ii) an impedance circuit configured to process signals from the at least two impedance electrodes to generate the TBEV waveform; measuring a photoplethysmograph (PPG) waveform from a third portion on the patient's body with an optical module comprising: i) an optical probe; and ii) an optical circuit configured to process signals from the optical probe to generate the PPG waveform; processing the TBEV waveform to determine a (dZ/dt)max value; determining a systolic flow time (SFT value by processing at least one of: i) the PPG waveform; ii) the TBEV waveform; and iii) the ECG waveform; and determining a stroke volume value by processing the SFT value and the (dZ/dt)max value.