US 12,102,767 B2
O2 concentrator with sieve bed bypass and control method thereof
Tom Westfall, Irvine, CA (US); and Enrico Brambilla, Irvine, CA (US)
Assigned to Breathe Technologies, Inc., Irvine, CA (US)
Filed by Breathe Technologies, Inc., Irvine, CA (US)
Filed on Feb. 14, 2023, as Appl. No. 18/109,560.
Application 18/109,560 is a division of application No. 16/874,472, filed on May 14, 2020, granted, now 11,607,519.
Claims priority of provisional application 62/851,204, filed on May 22, 2019.
Prior Publication US 2023/0181861 A1, Jun. 15, 2023
Int. Cl. B01D 53/04 (2006.01); A61M 16/00 (2006.01); A61M 16/10 (2006.01); A61M 16/20 (2006.01); B01D 53/047 (2006.01)
CPC A61M 16/101 (2014.02) [A61M 16/006 (2014.02); A61M 16/0063 (2014.02); A61M 16/20 (2013.01); B01D 53/047 (2013.01); A61M 2202/0208 (2013.01); A61M 2202/0266 (2013.01); A61M 2205/3337 (2013.01); B01D 2253/108 (2013.01); B01D 2256/12 (2013.01); B01D 2257/102 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for determining a total flow of gas and entrained air delivered by a ventilator to a patient, the method comprising:
measuring a flow of gas expelled by one or more nozzles of a patient ventilation interface connected to the ventilator, the patient ventilation interface including, in addition to the one or more nozzles, one or more apertures for the entrainment of additional ambient air for delivery to the patient;
measuring a pressure in the patient ventilation interface; and
determining the total flow based on the measured flow and the measured pressure, the total flow including the flow of gas expelled by the one or more nozzles and an entrainment flow of ambient air entrained by the one or more nozzles through the one or more apertures.
 
18. A ventilator comprising:
a processor or programmable circuit configured to measure a flow of gas expelled by one or more nozzles of a patient ventilation interface connected to the ventilator, the patient ventilation interface including, in addition to the one or more nozzles, one or more apertures for the entrainment of additional ambient air for delivery to the patient, measure a pressure in the patient ventilation interface, and determine the total flow based on the measured flow and the measured pressure, the total flow including the flow of gas expelled by the one or more nozzles and an entrainment flow of ambient air entrained by the one or more nozzles through the one or more apertures;
a flow sensor; and
a pressure sensor, wherein
said measuring the flow includes communicating with the flow sensor, and
said measuring the pressure includes communicating with the pressure sensor.