Patent ID: 7931023
Filing Date: 2011-04-26
Classification: A61M

Abstract:
1. A patient interface assembly adapted to be connected to a gas supply pump to deliver pressurized breathable gas to a patient, comprising: a patient interface in the form of a nasal-only mask or nasal prongs adapted to seal with the patient's nostrils to provide pressurized gas to the patient in the range of about 5-20 cmH one and only one supply tube connected to the patient interface, said supply tube being flexible along at least a part thereof and having a first end portion connected to the aperture of the patient interface and a second end portion connected to a swivel connector, the first end portion having an internal diameter ranging between about 9-15 mm; and at least one strap structured to hold the patient interface in position on the patient's head, the at least one strap adapted to pass around the rear of the patient's head, wherein the swivel connector includes a bore that is substantially larger than the diameter of the one and only one supply tube to connect to a gas delivery tube having an internal diameter of about 20 mm, whereby, in use, pressure swings that would otherwise result from a change in diameter are compensated for by controlling the pressure in the patient interface.