Resuscitation bag system with a gas control unit
Inventors
BOULANGER, Thierry • Richard, Jean-Christophe
Assignees
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude • Air Liquide Medical Systems SA
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Publication Number
US-11666717-B2
Publication Date
2023-06-06
Expiration Date
Abstract
A resuscitation bag system (1) useable for resuscitating a person in cardiac arrest, and having a gas control unit (90) with a first valve (92) fluidly connected to a first (922) and to a second conduit (923), the first (922) and second conduits (923) being arranged in parallel and further fluidly connected to the first conduit element (56), the first conduit (922) having a first flow restriction (924) configured for limiting the gas flow to a first flowrate, and the second conduit (923) comprising second flow restriction (925) configured for limiting the gas flow to a second flowrate, with the second flowrate being less than the first flowrate.
Core Innovation
The invention provides a resuscitation bag system useable for resuscitating a person in cardiac arrest. The system includes a hollow flexible bag comprising an inlet and an outlet, a first conduit element fluidly connected to the inlet to provide gas to the flexible bag, and a main conduit fluidly connected to the outlet to convey gas provided by the flexible bag.
The system further includes a gas control unit comprising a first valve fluidly connected to a first and to a second conduit arranged in parallel and further fluidly connected to the first conduit element. The first conduit comprises a first flow restrictor configured for limiting the gas flow to a first flowrate, and the second conduit comprises a second flow restrictor configured for limiting the gas flow to a second flowrate, the second flowrate being less than the first flowrate.
A recirculation unit senses oxygen concentration using a fluorescent oxygen sensor with a light emitter/receiver, and uses this sensing to decide between operations that include flushing nitrogen-rich gas to atmosphere at higher flow or recirculating purified gas via a CO2 adsorbent for lower flow operation. The monitoring module controls the valve(s) and oxygen flow to extend oxygen-cylinder autonomy during extended CPR by enabling lower-flow oxygen delivery when the sensed oxygen concentration indicates lower-flow operation.
Claims Coverage
The independent claim defines a resuscitation bag system for cardiac arrest with a gas control unit that uses first and second parallel conduits having flow restrictors such that the second flowrate is less than the first. The dependent claims add quant constraints for calibrated orifices and specify monitoring-module-controlled valve switching and additional valve/venting and mounting/architecture relationships.
Resuscitation bag system with parallel conduit flow restriction
A resuscitation bag system for resuscitating a person in cardiac arrest comprising a hollow flexible bag with an inlet and an outlet, a first conduit element connected to the inlet, a main conduit connected to the outlet, and a gas control unit with a first valve connected to first and second conduits arranged in parallel and connected to the first conduit element, where the first conduit has a first flow restrictor for limiting flow to a first flowrate and the second conduit has a second flow restrictor for limiting flow to a second flowrate, the second flowrate being less than the first flowrate.
Monitoring-module-controlled conduit switching via first valve
The gas control unit includes a first valve controlled by a monitoring module to direct gas into either a first or a second conduit.
Calibrated first orifice with a first flowrate threshold
The resuscitation bag system includes a first calibrated orifice configured to restrict gas flow to a first flowrate greater than 10 L/min.
Calibrated second orifice with a second flowrate limit
The resuscitation bag system includes a second calibrated orifice configured to limit gas flow to a second flowrate of less than 2 L/min.
Vent port and main one-way valve in main conduit
The resuscitation bag system includes a valve element with a venting port in a main conduit and a main one-way valve arranged between a hollow flexible bag and the valve element.
Monitoring module fixed to the valve element
The resuscitation bag system includes a monitoring module fixed to the valve element.
Overall, the claim set centers on a hollow flexible resuscitation bag system with a gas control unit using parallel conduits with flow restrictors to provide a lower second flowrate than a first flowrate, with dependent refinements specifying monitoring-controlled switching, calibrated orifice flow constraints, and additional valve/venting and mounting relationships.
Stated Advantages
Documented Applications
Extended CPR by extending oxygen-cylinder autonomy using operations including recirculating purified gas via a CO2 adsorbent for lower flow operation based on sensed oxygen concentration.
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