Ventilator system with gas flow control

A method for flow control, the method comprising:

• controlling, using an inspiratory gas pressure controller, provision of an inspiratory gaseous flow through an inspiratory lumen to a first portion of an airway of a patient while the inspiratory lumen is at least partially inserted into the airway;
• controlling, using an expiratory gas pressure controller, evacuation of an expiratory gaseous flow through an expiratory lumen from a second portion of the airway of the patient while the expiratory lumen is at least partially inserted into the airway, wherein the expiratory gas pressure controller is configured to vary expiratory pressure over time;
• and
• controlling, by a controller, the inspiratory gas pressure controller and the expiratory gas pressure controller based on respective properties of the inspiratory gaseous flow and the expiratory gaseous flow.

An apparatus for flow control, the apparatus comprising:

• an inspiratory lumen, wherein an inspiratory gas pressure controller is configured to control provision of an inspiratory gaseous flow through the inspiratory lumen to a first portion of an airway of a patient while the inspiratory lumen is at least partially inserted into the airway;
• a filter in the inspiratory lumen, wherein the filter is configured to filter at least a portion of the inspiratory gaseous flow as the inspiratory gaseous flow passes through the inspiratory lumen;
• an expiratory lumen, wherein an expiratory gas pressure controller is configured to control evacuation of an expiratory gaseous flow through the expiratory lumen from a second portion of the airway of the patient while the expiratory lumen is at least partially inserted into the airway;
• a one-way flow valve configured to restrict the expiratory gaseous flow from reaching the filter;
• and
• a processor that is configured to control at least the inspiratory gas pressure controller and the expiratory gas pressure controller based on respective properties of the inspiratory gaseous flow and the expiratory gaseous flow.

An apparatus for flow control, the apparatus comprising:

• an inspiratory lumen, wherein an inspiratory gas pressure controller is configured to control provision of an inspiratory gaseous flow through the inspiratory lumen to a first portion of an airway of a patient while the inspiratory lumen is at least partially inserted into the airway;
• an expiratory lumen, wherein an expiratory gas pressure controller is configured to control evacuation of an expiratory gaseous flow through the expiratory lumen from a second portion of the airway of the patient while the expiratory lumen is at least partially inserted into the airway;
• a pressure sensor configured to be located at a trachea of the patient, wherein the pressure sensor measures a pressure associated with a gas flow within the trachea of the patient;
• and
• a processor that is configured to control at least the inspiratory gas pressure controller and the expiratory gas pressure controller based on respective properties of the inspiratory gaseous flow and the expiratory gaseous flow and based on a pressure measurement from the pressure sensor.