Patent ID: 7243649
Filing Date: 2007-07-17
Classification: A61M

Abstract:
1. An anesthesia delivery device capable of being coupled to a ventilation system comprising an inspiratory gas input for delivering gas to a patient and an exhaust gas output for delivering gas from the patient to the ventilation system, the anesthesia delivery device comprising: an inspiratory gas line having a machine end and a patient end portion, the machine end being capable of being fluidly coupled to the inspiratory gas input of the ventilation system, and the patient end portion being configured for being received within the naris of the patient for delivering inspiratory gas to the naris of the patient, a face mask comprising a dome portion sized to cover the patient's nose without covering the patient's mouth, the dome portion defining an inside air space between the patient's nose and the dome portion, and an outside air space exterior of the dome portion, the dome portion including a gas port, the patient end portion comprising a flexible cannula having a source end disposed in the outside air space, a middle portion extending through the dome portion, and a patient end configured for being received within the naris of the patient for delivering inspiratory gas to the naris of the patient, the gas port of the face mask being sized to slidably receive the flexible cannula for permitting the user to move the cannula relative to the face mask and gas port to enable a user to place an end of the flexible cannula in a desired position within the naris of the patient a vent for allowing gas to pass between the inside air space and the outside air space, and an exhaust port capable of being fluidly coupled to the exhaust gas output of the ventilation system for allowing gas to pass from the inside air space to the exhaust gas output of the ventilation system; wherein the exhaust port and vent are capable of cooperatively exerting a negative pressure on the outside air space adjacent to the face mask for preventing inspiratory gases from entering the outside air space adjacent to the face mask.