Interface
AssigneeFisher & Paykel Healthcare Limited
InventorStanislav Tatkov
Life of this patent
Estimating the term…
Abstract
A user interface having a non-sealing nasal cannula and a mask arranged about the nasal cannula, the mask including a seal configured to seal with a user's face to allow the interface to be pressurised, the cannula configured to deliver breathing gases to the nares of a user at a flow rate exceeding the intended user's peak inspiratory flow requirements so that the mask and the user's pharynx are flushed continuously with fresh breathing gases to reduce dead space.
Claims29
A method of delivering breathing gases to a patient, the method comprising:
- applying a patient interface to the patient, the patient interface comprising:
- a mask body forming a chamber;
- a seal configured to seal with the patient's face to allow the chamber to be pressurized with breathing gases;
- a pair of non-sealing prongs configured to direct the breathing gases towards the patient's nares;
- and
- a gas inlet that receives the breathing gases from a pressurized gas source;
- directing a flow of breathing gases from the pressurized gas source toward the gas inlet;
- introducing the flow of breathing gases through the gas inlet;
- providing the flow of breathing gases introduced through the gas inlet to the chamber at a location upstream of the pair of non-sealing prongs;
- downstream of providing the flow of breathing gases to the chamber, providing at least a portion of the breathing gases introduced through the gas inlet through an internal passage of each of the pair of non-sealing prongs, the portion of breathing gases passing through the internal passage of each of the pair of non-sealing prongs being directed toward the nares;
- and
- exhausting expired gases from the patient interface through an exhaust in the mask body, and providing continuous breathing gases through the pair of non-sealing prongs and through the location upstream of the pair of non-sealing prongs to flush anatomical dead space in a nasal cavity of the patient and expired gases in the chamber.
A method of delivering breathing gases to a patient, the method comprising:
- applying a patient interface to the patient, the patient interface comprising:
- a mask body forming a chamber;
- a seal configured to seal with the patient's face to prevent uncontrolled leaks between the patient's face and the mask body;
- a non-sealing prong configured to direct the breathing gases toward a naris of the patient;
- and
- a gas inlet that receives the breathing gases from a pressurized gas source;
- directing a flow of breathing gases from the pressurized gas source toward the gas inlet;
- introducing the flow of breathing gases through the gas inlet;
- providing the flow of breathing gases introduced through the gas inlet to the chamber at a location upstream of the non-sealing prong;
- downstream of providing the flow of breathing gases to the patient's mouth, providing at least a portion of the breathing gases introduced through the gas inlet to the patient's nares via an internal passage of the non-sealing prong, the portion of the breathing gases passing through the internal passage of the non-sealing prong being directed toward the nares;
- and
- exhausting expired gases from the patient interface through an exhaust in the mask body, and providing continuous breathing gases through the non-sealing prong and through the location upstream of the non-sealing prong to flush anatomical dead space in a nasal cavity of the patient and expired gases in the chamber.
Dependencies are inferred from the claim text.