Patent ID: 9144658
Filing Date: 2015-09-29
Classification: A61M

Abstract:
1. A method for controlling exhalation during ventilation of a patient on a ventilator, the method comprising: determining a control command for an exhalation valve, wherein the control command targets a pressure at the exhalation valve between a minimum pressure and a steady-state pressure for a period of time; controlling the exhalation valve based on the control command during one or more exhalation cycles; monitoring an end exhalation pressure and a flow undershoot during the one or more exhalation cycles; comparing the end exhalation pressure to a predetermined pressure range; comparing the flow undershoot to a predetermined flow threshold; and based on the comparing, updating the control command in order to maintain a positive-end expiratory pressure (PEEP) at the end of the one or more exhalation cycles.