Gerät und Verfahren zur Strömungsauslösung bei atmungsunterstützter Beatmung

摘要

The system and method for flow triggering breath supported ventilation include a source (12, 14) of a predetermined, preinspiratory, constant flow of breathing gas to a patient, one or more flow sensors (16, 18, 32, 41, 42, 43) for measuring the rate of gas flow in a flow path communicating with the patient, means (46) for determining when inhalation from the flow path has occurred, and means (20, 22) for generating breath support in the delivered gas flow in response to inhala- tion by the patient, means (44) to terminate breath support when inspiratory phase concludes, and means (46) to re-establish the predetermined, preinspiratory, continuous flow of breathing prior to the patient's next inspiratory effort. A plurality of individual gas sources (12, 14) preferably provide a controlled mixture of breathing gas. In combination with breath support to the patient during the inspiration effort, the flow triggering strategy of the invention offers significant improvements in providing breath support to patients having weakened respiratory capabilities.