Patent ID: 11872349
Assignee: COVIDIEN LP
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 12:
13. A system for increasing oxygen concentration, the system comprising:
an oxygen valve configured to be coupled to an oxygen source;
an oxygen plenum coupled to the oxygen valve;
a mixing valve comprising:
an oxygen inlet coupled to the oxygen plenum;
an ambient-air inlet, wherein the ambient-air inlet of the mixing valve further comprises a check valve; and
an outlet configured to be attached to an inlet of a blower of a ventilator;

a pressure sensor coupled to the oxygen plenum, the pressure sensor configured to measure a differential pressure between gas in the oxygen plenum and ambient air; and
a control device communicatively coupled to the pressure sensor and the oxygen valve, the control device configured to perform a set of operations including:
receiving the differential pressure measured by the pressure sensor; and
based on the measured differential pressure, generating a control signal to control the oxygen valve to maintain a target pressure of gas within the oxygen plenum.