Automatic patient ventilator system and method

A ventilator apparatus, comprising:

• a portable housing;
• a pneumatic assembly disposed in the portable housing, the pneumatic assembly being configured to output gas to be delivered to a patient's airway;
• a controller disposed in the portable housing and in communication with the pneumatic assembly, the controller being configured to operate the pneumatic assembly to output gas to the patient's airway;
• a barometric pressure sensor in communication with the controller, the barometric pressure sensor being configured to monitor ambient barometric pressure and to communicate the monitored ambient barometric pressure to the controller;
• and
• at least one other sensor in communication with the controller and configured to take measurements with respect to the gas output to the patient's airway by the pneumatic assembly,
• wherein the controller is configured to determine breathing parameter data and to operate the pneumatic assembly to output gas to the patient's airway according to the determined breathing parameter data, the breathing parameter data comprising a ventilation rate and a tidal volume,
• wherein the controller is configured to determine an initial tidal volume based on a patient size characteristic input to the controller,
• wherein the controller is configured to apply correction factors to the measurements made by the at least one other sensor in communication with the controller and to adjust the breathing parameter data based on the monitored ambient barometric pressure,
• wherein the controller is configured to assess a peak inspiratory pressure of the gas output to the patient's airway and adjust the ventilation rate and the tidal volume to reduce the peak inspiratory pressure and maintain a desired minute volume of the gas output to the patient's airway when the assessed peak inspiratory pressure exceeds a predetermined threshold pressure,
• wherein the at least one predefined operational mode comprises one or more CPR operational modes, the controller being configured to determine the breathing parameter data in accordance with the one or more CPR operational modes input to the controller, the one or more CPR operational modes comprising at least a CPR tube mode and a CPR mask mode,
• wherein the controller is configured to receive a selection between the CPR tube mode and the CPR mask mode,
• wherein the CPR tube mode is selected when the patient's airway requires the use of a tube device for ventilation and the CPR mask mode is selected when the patient's airway requires the use of a mask for ventilation, and
• wherein the controller is configured to determine different breathing parameter data when the CPR tube mode is input to the controller than when the CPR mask mode is input to the controller.