Patent ID: 8744577
Filing Date: 2014-06-03
Classification: A61B,A61N,G16H

Abstract:
1. An electrotherapy device, comprising: a first sensor, that is adapted to be external to and adapted to be placed on a patient, and configured to sense a photodetection signal in a patient that includes a pulse oximetry signal; a second sensor, that is adapted to be external to and adapted to be placed on a patient, and configured to receive an impedance-sensing signal from the patient; an electrotherapy generator, that is external to the patient, and is configured for delivering pacing stimuli to the patient through skin of the patient; and processing circuitry, that is adapted to be external to the patient, and configured to analyze the photodetection signal for features indicative of a cardiac pulse and to analyze the impedance-sensing signal for a fluctuation due to a cardiac pulse, the processing circuitry also configured to average the analyzed photodetection signal and the analyzed the impedance-sensing signal, and determine, based on the averaged photodetection signal and the averaged impedance-sensing signal, whether the cardiac pulse occurred in the patient following the delivery of a pacing stimulus of the pacing stimuli of the patient, the processing circuitry increasing the current of further pacing stimuli to be delivered to the patient if a cardiac pulse did not occur in the patient following the delivery of the pacing stimulus.