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Publication Number
US-11344692-B2
Publication Date
2022-05-31
Expiration Date
Abstract
A passive valve for use as a fixed leak valve. The valve includes a body having an internal chamber, first and second body ports in fluid communication with the chamber with the first port configured for fluid communication with a patient connection and the second body port configured for fluid communication with a ventilator, a body passageway in fluid communication with the chamber and with ambient air exterior of the body, and a check valve seal positioned to seal the body passageway to permit the flow of gas within the chamber through the body passageway to the exterior of the body and to prevent the flow of ambient air exterior of the body through the body passageway into the chamber. In alternative embodiments, the valve is incorporated into the patient connection or constructed as a separate part connectable to the patient connection.
Core Innovation
The disclosed invention relates to a portable ventilator system for providing respiratory therapy to a patient. The system includes an air source and an oxygen source, and a patient connection configured to interface with the patient. A patient circuit fluidly couples the air source and the oxygen source to the patient connection and includes a first lumen configured to receive air and a second lumen configured to receive oxygen, with the first lumen and the second lumen configured to isolate the received air and the received oxygen along at least a portion of the patient circuit.
A leak valve is positioned in the patient connection and/or the patient circuit. The second lumen extends downstream of the leak valve, thereby preventing the received oxygen from leaking out of the leak valve.
The disclosed architecture further includes passive and active patient circuit components and ventilator-related routing using rotary valve assemblies and control signals. The described control and actuation architecture includes an active exhalation valve with pilot pressure control using a double bellows member, a control system, blower, suction assembly, nebulizer interface, an oxygen assembly using a VPSA process, and rotary valve assemblies configured to route gases for suction, nebulization, oxygen metering, and delivery to a patient circuit.
Claims Coverage
This section identifies the independent claims, focusing on the separation of air and oxygen into isolated lumens and the relationship of the oxygen lumen to a leak valve so that oxygen does not leak out of the leak valve.
Isolated air and oxygen lumens along the patient circuit
A patient circuit configured to fluidly couple an air source and an oxygen source to the patient connection, the patient circuit having a first lumen configured to receive air from the air source and direct the received air to the patient connection, and a second lumen configured to receive oxygen from the oxygen source and direct the received oxygen to the patient connection, wherein the first lumen and the second lumen are configured to isolate the received air and the received oxygen along at least a portion of the patient circuit.
Oxygen lumen extends downstream of the leak valve to prevent oxygen leakage
A leak valve positioned in the patient connection and/or the patient circuit, wherein the second lumen extends downstream of the leak valve to prevent the received oxygen from leaking out of the leak valve.
Delivering oxygen by bypassing a leak valve between isolated lumens
A method of providing respiratory therapy to a patient, comprising delivering air to the patient via a first lumen extending between an air source and a patient connection, and delivering oxygen to the patient via a second lumen extending between an oxygen source and the patient connection, wherein at least a portion of the second lumen is isolated from the first lumen, and wherein delivering oxygen to the patient via the second lumen includes bypassing a leak valve in the first lumen and/or the patient connection.
Across the independent claims, the inventive concept is the combination of separated, isolating lumens for air and oxygen with a leak valve arrangement such that the oxygen lumen extends downstream of, or bypasses, the leak valve to prevent received oxygen from leaking out of the leak valve.
Stated Advantages
Prevents the received oxygen from leaking out of the leak valve.
Documented Applications
Portable ventilator system including integrated cough assist, a nebulizer, and oxygen delivery using patient circuits implemented as passive or active.
Respiratory therapy delivery to a patient via a patient connection configured to interface with the patient.
Rotary valve assemblies configured to route gases for suction, nebulization, oxygen metering, and delivery to a patient circuit.
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