Patent ID: 7077132

Claim:
A method for treatment of Cheyne-Stokes breathing during the provision of ventilatory support comprising the steps of: delivering a controlled supply of breathable gas at a pressure above atmospheric to a subject to provide the subject with ventilatory support during an inspiratory portion and an expiratory portion of a respiratory cycle of the subject; deriving a measure of respiratory airflow from the subject; selecting a ventilatory support target measure to oppose a Cheyne-Stokes pattern of breathing, said ventilatory support target measure being determined as a function of the measure of respiratory airflow; and modulating the degree of ventilatory support as a function of said ventilatory support target measure and said measure of respiratory airflow, wherein said ventilatory support counteracts a Cheyne Stokes waxing-waning pattern of breathing by changing pressure levels in the inspiratory portion and the expiratory portion, said changing pressure levels varying from previous pressure levels delivered in a previous inspiratory portion and a previous expiratory portion of a previous respiratory cycle of the subject.