NASAL PILLOWS WITH HIGH VOLUME BYPASS FLOW AND METHOD OF USING SAME

摘要

A fan unit which in use forms part of a gases supply unit, the gases supply unit suitable for use as part of a system for providing heated humidified gases to a user, the fan unit having a casing that has an inlet aperture and an outlet passage, the outlet passage including an exit aperture, the fan unit also including a fan which is located inside the casing and which is adapted for connection to a motor to drive rotation of the fan in use, the fan drawing gases into the casing via the inlet aperture, and forcing these gases out of the casing via the outlet passage as a gases stream, the outlet passage further including at least one bypass vent hole independent of the exit aperture and arranged at an angle to the path of the gases stream through the outlet passage.

主权项

1. A method of providing gases to an airway of a patient via a system that includes an interface having a pressure sensor, a gasses source configured to provide a gases stream, control circuitry configured to control a flow rate of said gases stream, and a conduit having first and second ends, said conduit in fluid communication with said gases source at said first end and in fluid communication with said patient interface at said second end, said method comprising:
receiving, by said control circuitry, a parameter value that defines a rate at which said gases are to be provided to said airway of said patient; determining, by said control circuitry, an airway pressure in said airway of said patient; processing, by said control circuitry, said determined airway pressure and said set parameter value to determine a pressure comparison value; and adjusting, by said control circuitry, said flow rate of said gases stream in response to said pressure comparison value being beyond a predetermined threshold.