Automatically controlled ventilation system

Abstract

A system for controlling and regulating breathing gas supplied to a patient that includes a pressure generator system that provides breathing gas to a patient and a patent circuit that delivers the breathing gas to the patient. The system includes an interface device coupled to the patient circuit to communicate the flow of gas to the patient' airway. A sensor detects a parameter indicative of a flow of breathing gas delivered to the patient. A controller coupled to the sensor and the pressure generator system measures at least one characteristic of respiratory airflow of a patient and calculates a target breath-amplitude -based parameter and a time -based parameter of at least a portion of the patient's respiratory cycle to be delivered to the patient based on the at least one characteristic of respiratory airflow.

Description

[0001] This patent application claims the benefit of priority under 35 U.S.C. §119(e) to U.S. Provisional Application No. 61 / 297400, filed January 22, 2010, the contents of which are hereby incorporated by reference. technical field

[0002] The present invention relates to a ventilator and a method of controlling the ventilator to provide a desired target volume of fluid, such as air or an oxygen mixture, to a patient. Background technique

[0003] Conventional ventilators can be used to deliver a fluid, such as air or an oxygen mixture, to a patient in a set target volume ventilation mode, in which the ventilator attempts to deliver a preset volume of fluid to the patient during inspiration. To adjust the volume of fluid delivered to the patient during inhalation to achieve this target volume during each inhalation, the ventilator adjusts the pressure of the fluid provided to the patient. For example, for a given inspiratory phase over multiple breathing cycles, increasing...

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