Venturi geometry design for flow-generator patient circuit

Details Venturi geometry design for flow-generator patient circuit Venturi geometry design for flow-generator patient circuit

A - Human Necessities

61

M

A61M 16/00 (2006.01) A62B 7/00 (2006.01)

Patent

CA 2624514

Provided is a universal interface adapted for providing continuous positive airway 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 about 120 centimeters of H2O in order to deliver pressure to the patient of up to about 15 cm of H2O at a flow rate of up to about 12 liters/minute. The universal interface may comprise an interface body having a space pair of breathing passageways intersecting a corresponding of supply passageways. Each one of the breathing passageways is comprised of a patient passageway and an exhalation passageway. Each one of the supply passageways includes a jet venturi having a taper portion. Each one of the exhalation passageways includes a taper portion which tapers outwardly along a direction from the patient passageway toward the exhalation passageway.

La présente invention concerne une interface polyvalente conçue pour fournir une pression positive expiratoire continue à un patient lorsque l'interface est utilisée avec un ventilateur classique. Cette interface est conçue pour fonctionner à un pression d'alimentation qui ne dépasse pas 120 cm environ de H2O afin de fournir une pression d'environ 15 cm de H2O au patient à un débit d'environ 12 litres/minute. L'interface polyvalente peut comprendre un corps d'interface présentant une paire de passages de respiration espacés qui recoupent un passage d'alimentation correspondant. Chacun des passages de respiration est constitué d'un passage d'alimentation patient et d'un passage d'expiration. Chacun des passages d'alimentation comprend un venturi à jet présentant une portion conique. Chacun des passages d'expiration comprend une portion conique qui s'amincit vers l'extérieur le long d'une direction depuis le passage d'alimentation patient vers le passage d'expiration.

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