Patent ID: 9492629
Filing Date: 2016-11-15
CPC Classification: A61M

Claim Text:
1. A method for ventilating a patient with a ventilator, comprising: monitoring inspiratory flow, expiratory flow, and expiratory pressure during ventilation of the patient with the ventilator; monitoring features associated with at least one of an expiratory flow sensor, an expiratory pressure sensor, and a main driver; delivering ventilation for any breath type during a predetermined or a selected mode of ventilation based at least on the expiratory flow and the expiratory pressure, wherein the predetermined or the selected mode of ventilation includes a spontaneous mode, an assist mode, or a mandatory mode; determining, with the ventilator, a malfunction in at least one of the expiratory flow sensor, the expiratory pressure sensor, and the main driver that makes at least one of the expiratory flow and the expiratory pressure unreliable based on the features associated with at least one of the expiratory flow sensor, the expiratory pressure sensor, and the main driver; in response to the malfunction, automatically ceasing the delivering of the predetermined or the selected mode of ventilation based at least on the expiratory flow and the expiratory pressure and instead automatically delivering an exhalation backup ventilation mode based on at least one of the inspiratory flow and an inspiratory pressure by the ventilator; controlling pressure delivered during the ventilation based at least on controlling an exhalation valve; controlling the exhalation valve with the main driver; in response to the malfunction, controlling the exhalation valve with a backup driver includes: inputting the inspiratory flow and the inspiratory pressure during inspiration into an inspiratory control algorithm; and inputting the inspiratory flow and the inspiratory pressure during exhalation into an expiratory control algorithm.