Patent ID: 11904094
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A method for controlling oxygen mix for a single-limb non-invasive ventilator comprising a pressure controller, and further comprising both an air blower and a pressurized oxygen source, wherein the pressurized oxygen source is downstream of the air blower, wherein the air blower comprises a blower flow controller and the pressurized oxygen source comprises a pressurized oxygen source flow controller, and wherein the pressurized oxygen source comprises a proportional flow valve controlling flow, the method comprising:
receiving, by the ventilator, a target pressure and target oxygen mix;
generating, from an output of the pressure controller, a total flow trajectory;
providing the generated total flow trajectory from the pressure controller to a pair of complimentary flow coupling filters, the pair of complimentary flow coupling filters comprising a blower flow coupling filter and an oxygen flow coupling filter;
generating an output from each of the blower flow coupling filter and the oxygen flow coupling filter, comprising an input flow trajectory for the blower flow controller and an input flow trajectory for the pressurized oxygen source flow controller, respectively; and
adjusting, by the blower flow controller and/or oxygen flow controller based on the input flow trajectory and the received target pressure and target oxygen mix, the blower speed and/or the proportional flow valve.