Provided is a universal interface adapted for providing continuous positiveairway pressure to a patient when the interface is used with a standard ventilator.The interface is configured to operate at a supply pressure no greater than about120 centimeters of H2O in order to deliver pressure to the patient of up to about15 cm of H2O at a flow rate of up to about 12 liters/minute. The universal interfacemay comprise an interface body having a space pair of breathing passageways intersectinga corresponding of supply passageways. Each one of the breathing passagewaysis comprised of a patient passageway and an exhalation passageway. Each one ofthe supply passageways includes a jet venturi having a taper portion. Each oneof the exhalation passageways includes a taper portion which tapers outwardlyalong a direction from the patient passageway toward the exhalation passageway.
