Patent ID: 8801619
Filing Date: 2014-08-12
Classification: A61B,A61M

Abstract:
1. A monitor, comprising: an input circuit configured to receive a photoplethysmography signal from a ventilated patient; a memory storing an algorithm configured to determine one or more characteristics of the photoplethysmography signal indicative of a ventilation weaning readiness and to determine the ventilation weaning readiness of the ventilated patient based on the one or more characteristics, wherein the one or more characteristics comprise pulse amplitude, and wherein the algorithm is configured to determine weaning readiness based at least in part on an increase in pulse amplitude during an inspiration phase relative to an exhalation phase of a breathing cycle of the ventilated patient; a processor configured to execute the algorithm; and a display configured to provide an indication of the ventilation weaning readiness of the ventilated patient.