Patent ID: 9345850
Filing Date: 2016-05-24
CPC Classification: A61M

Claim Text:
1. A ventilator system comprising: a pressurized gas supply; at least two containers comprising a first container comprising a body of fluid and a second container filled to a level with a body of fluid; a primary duct including proximal and distal ends, the proximal end adapted for connection to the pressurized gas supply, the primary duct also adapted for connection to a patient interface between the proximal and distal ends; a three-port valve comprising one inlet port, a first outlet port and a second outlet port, the inlet port connected to the distal end of the primary duct; wherein the ventilator system further comprises: (i) at least one peak inspiratory pressure (PIP) control duct connected to the first outlet port of the valve and having a length immersed in the body of fluid in the first container; (ii) at least one positive end-expiratory pressure (PEEP) control duct connected to the second outlet port of the valve and having a length immersed in the body of fluid in the second container; (iii) wherein the immersed length of the PIP control duct in the first container is greater than the immersed length of the PEEP control duct in the second container; and (iv) wherein the three-port valve is configured to cycle between the first outlet port and the second outlet port thereby switching flow of a gas from the inlet port to only the first outlet port and from the inlet port to only the second outlet port.