초록 ▼

A pneumatic system is provided for a ventilator is provided for controlling inspired and expired patient gas flow during respiratory therapy. The pneumatic system includes a pneumatic circuit for controlling a supply of one or more selected gases to a patient and a disposable patient breathing circu

A pneumatic system is provided for a ventilator is provided for controlling inspired and expired patient gas flow during respiratory therapy. The pneumatic system includes a pneumatic circuit for controlling a supply of one or more selected gases to a patient and a disposable patient breathing circuit for isolating exhaled patient gasses from the pneumatic circuit. The pneumatic circuit includes a dual venturi for assisting compression and expansion of a flexible gas reservoir of the patient breathing circuit.

대표청구항 ▼

A pneumatic system for a ventilator in fluid communication with a source of gas comprising: a pneumatic circuit including a sealed canister, a valve, a double venturi having first and second jets and a proportional control valve for providing a selected volume of said gas to said valve, said valve d

A pneumatic system for a ventilator in fluid communication with a source of gas comprising: a pneumatic circuit including a sealed canister, a valve, a double venturi having first and second jets and a proportional control valve for providing a selected volume of said gas to said valve, said valve directing said gas to one of said first jet and said second jet of said double venturi, said double venturi being in fluid communication with said sealed canister; and a patient breathing circuit including a first port for introducing said gas into said patient breathing circuit, a humidifier downstream from said source of gas for humidifying said gas, a flexible reservoir for containing a variable volume of said gas, said flexible reservoir located within said sealed canister downstream from said humidifier, and a second port downstream from said flexible reservoir, wherein gas directed through said first jet entrains gas within said sealed canister away from said sealed canister to reduce the pressure on the exterior of said flexible reservoir, and gas directed through said second jet entrains gas toward said sealed canister to increase pressure on the exterior of said flexible reservoir.