초록 ▼

A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow l

A ventilator device and system comprising a rotating compressor, preferably a drag compressor, which, at the beginning of each inspiratory ventilation phase, is accelerated to a sufficient speed to deliver the desired inspiratory gas flow, and is subsequently stopped or decelerated to a basal flow level to permit the expiratory ventilation phase to occur. The ventilator device is small and light weight enough to be utilized in portable applications. The ventilator device is power efficient enough to operate for extended periods of time on internal or external batteries. Also provided is an oxygen blending apparatus which utilizes solenoid valves having specific orifice sizes for blending desired amounts of oxygen into the inspiratory gas flow. Also provided is an exhalation valve having an exhalation flow transducer which incorporates a radio frequency data base to provide an attendant controller with specific calibration information for the exhalation flow transducer.

대표청구항 ▼

[ What is claimed is:] [9.] An exhalation valve comprising:a housing defining an expiratory gas flow path connectable to a mammalian patient such that expiratory gas exhaled by the patient will pass through said flow path in a first direction;a valve associated with said flow path to permit gas exha

[ What is claimed is:] [9.] An exhalation valve comprising:a housing defining an expiratory gas flow path connectable to a mammalian patient such that expiratory gas exhaled by the patient will pass through said flow path in a first direction;a valve associated with said flow path to permit gas exhaled by the patient to pass through said flow path in said first direction, but to prevent gas from being drawn through said flow path in a second direction, opposite said first direction, when said patient inhales;a flow measuring apparatus for monitoring the flow rate of expiratory gas passing through said exhalation valve; andspecific flow-pressure calibration information for the flow measuring apparatus stored on a storage medium contained within the exhalation valve housing.